Srinivas Pandruvada [Tue, 6 Dec 2016 21:32:16 +0000 (13:32 -0800)]
cpufreq: intel_pstate: Support for energy performance hints with HWP
It is possible to provide hints to the HWP algorithms in the processor
to be more performance centric to more energy centric. These hints are
provided by using HWP energy performance preference (EPP) or energy
performance bias (EPB) settings.
The scope of these settings is per logical processor, which means that
each of the logical processors in the package can be programmed with a
different value.
This change provides cpufreq sysfs interface to provide hint. For each
policy, two additional attributes will be available to check and provide
hint. These attributes will only be present when the intel_pstate driver
is using HWP mode.
These attributes are:
- energy_performance_available_preferences
- energy_performance_preference
To get list of supported hints:
$ cat energy_performance_available_preferences
default performance balance_performance balance_power power
The current preference can be read or changed via cpufreq sysfs
attribute "energy_performance_preference". Reading from this attribute
will display current effective setting changed via any method. User can
write any of the valid preference string to this attribute. User can
always restore to power-on default by writing "default".
Implementation
Since these hints can be provided by direct MSR write or using some tools
like x86_energy_perf_policy, the driver internally doesn't maintain any
state. The user operation will result in direct read/write of MSR: 0x774
(HWP_REQUEST_MSR). Also driver use read modify write to update other
fields in this MSR.
Summary of changes:
- struct cpudata field epp_saved is renamed to epp_powersave, as this
stores the value to restore once policy is switched from performance
to powersave to restore original powersave EPP value.
- A new struct cpudata field epp_saved is used to store the raw MSR
EPP/EPB value when a CPU goes offline or on suspend and restore on
online/resume. This ensures that EPP value is restored to correct
value irrespective of the means used to set.
- EPP/EPB value ranges are fixed for each preference, which can be
set for the cpufreq sysfs, so user request is mapped to/from this
range.
- New attributes are only added when HWP is present.
- Since EPP value of 0 is valid the fields are initialized to
-EINVAL when not valid. The field epp_default is read only once
after powerup to avoid reading on subsequent CPU online operation
- New suspend callback to store epp on suspend operation
- Don't invalidate old epp_saved field on resume and online as now
we can restore last epp value on suspend and this field can still
have old EPP value sampled during switch to performance from
powersave.
- While here optimized setting of cpu_data->epp_powersave = epp in
intel_pstate_hwp_set() as this was done in both true and false
paths.
- epp/epb set function returns error to caller on failure to pass
on to user space for display.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Tue, 6 Dec 2016 21:32:15 +0000 (13:32 -0800)]
cpufreq: intel_pstate: Add locking around HWP requests
To avoid race conditions from multiple threads, increase the scope
of intel_pstate_limits_lock to include HWP requests also.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Chen Yu [Mon, 4 Jan 2016 04:14:45 +0000 (12:14 +0800)]
cpufreq: ondemand: Set MIN_FREQUENCY_UP_THRESHOLD to 1
Currently the minimal up_threshold is 11, and user may want to
use a smaller minimal up_threshold for performance tuning,
so MIN_FREQUENCY_UP_THRESHOLD could be set to 1 because:
1. Current systems wouldn't be affected as they have already
a value >= 11.
2. New systems with a default kernel would keep still the default
value that is >= 11.
Users now have the advantage that they can make their own decisions
and customize the 'trip point' to switch to the max frequency.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=65501
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Piotr Luc [Thu, 13 Oct 2016 15:31:00 +0000 (17:31 +0200)]
cpufreq: intel_pstate: Add Knights Mill CPUID
Add Knights Mill (KNM) to the list of CPUIDs supported by intel_pstate.
Signed-off-by: Piotr Luc <piotr.luc@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Rafael J. Wysocki [Wed, 30 Nov 2016 01:31:02 +0000 (02:31 +0100)]
MAINTAINERS: Add bug tracking system location entry for cpufreq
The kernel Bugzilla is used for tracking cpufreq bugs, so document
that.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Len Brown <len.brown@intel.com>
Baoyou Xie [Wed, 30 Nov 2016 07:35:29 +0000 (15:35 +0800)]
cpufreq: dt: Add support for zx296718
Add the compatible string for supporting the generic cpufreq driver on
the ZTE's zx296718 SoC.
Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Sebastian Andrzej Siewior [Mon, 28 Nov 2016 09:52:03 +0000 (10:52 +0100)]
cpufreq: acpi-cpufreq: drop rdmsr_on_cpus() usage
The online / pre_down callback is invoked on the target CPU since commit
1cf4f629d9d2 ("cpu/hotplug: Move online calls to hotplugged cpu") which means
for the hotplug callback we can use rmdsrl() instead of rdmsr_on_cpus().
This leaves us with set_boost() as the only user which still needs to
read/write the MSR on different CPUs. There is no point in doing that
update on all cpus with the read modify write magic via per cpu data. We
simply can issue a function call on all online CPUs which also means that we
need half that many IPIs.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Sebastian Andrzej Siewior [Mon, 28 Nov 2016 09:51:02 +0000 (10:51 +0100)]
cpufreq: acpi-cpufreq: Convert to hotplug state machine
Install the callbacks via the state machine.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Arnd Bergmann [Fri, 25 Nov 2016 16:50:20 +0000 (17:50 +0100)]
cpufreq: intel_pstate: fix intel_pstate_exit_perf_limits() prototype
The addition of the generic governor support marked the
intel_pstate_exit_perf_limits as inline(), which fixed a warning,
but it introduced another warning:
drivers/cpufreq/intel_pstate.c: In function ‘intel_pstate_exit_perf_limits’:
drivers/cpufreq/intel_pstate.c:483:1: error: no return statement in function returning non-void [-Werror=return-type]
This changes it back to a 'void' return type, and changes the
corresponding intel_pstate_init_acpi_perf_limits() function to
be inline as well for consistency.
Fixes:
001c76f05b01 (cpufreq: intel_pstate: Generic governors support)
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Fri, 25 Nov 2016 00:07:10 +0000 (16:07 -0800)]
cpufreq: intel_pstate: Set EPP/EPB to 0 in performance mode
When user has selected performance policy, then set the EPP (Energy
Performance Preference) or EPB (Energy Performance Bias) to maximum
performance mode.
Also when user switch back to powersave, then restore EPP/EPB to last
EPP/EPB value before entering performance mode. If user has not changed
EPP/EPB manually then it will be power on default value.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Tue, 22 Nov 2016 00:33:20 +0000 (16:33 -0800)]
cpufreq: intel_pstate: increase precision of performance limits
Even with round up of limits->min_perf and limits->max_perf, in some
cases resultant performance is 100 MHz less than the desired.
For example when the maximum frequency is 3.50 GHz, setting
scaling_min_frequency to 2.3 GHz always results in 2.2 GHz minimum.
Currently the fixed floating point operation uses 8 bit precision for
calculating limits->min_perf and limits->max_perf. For some operations
in this driver the 14 bit precision is used. Using the 14 bit precision
also for calculating limits->min_perf and limits->max_perf, addresses
this issue.
Introduced fp_ext_toint() equivalent to fp_toint() and int_ext_tofp()
equivalent to int_tofp() with 14 bit precision.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Tue, 22 Nov 2016 00:33:19 +0000 (16:33 -0800)]
cpufreq: intel_pstate: round up min_perf limits
In some use cases, user wants to enforce a minimum performance limit on
CPUs. But because of simple division the resultant performance is 100 MHz
less than the desired in some cases.
For example when the maximum frequency is 3.50 GHz, setting
scaling_min_frequency to 1.6 GHz always results in 1.5 GHz minimum. With
simple round up, the frequency can be set to 1.6 GHz to minimum in this
case. This round up is already done to max_policy_pct and max_perf, so do
the same for min_policy_pct and min_perf.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Rafael J. Wysocki [Fri, 18 Nov 2016 12:59:21 +0000 (13:59 +0100)]
cpufreq: Make cpufreq_update_policy() void
The return value of cpufreq_update_policy() is never used, so make
it void.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Rafael J. Wysocki [Fri, 18 Nov 2016 12:57:54 +0000 (13:57 +0100)]
ACPI / processor: Make acpi_processor_ppc_has_changed() void
The return value of acpi_processor_ppc_has_changed() is never used,
so make it void.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Rafael J. Wysocki [Fri, 18 Nov 2016 12:40:45 +0000 (13:40 +0100)]
cpufreq: Avoid using inactive policies
There are two places in the cpufreq core in which low-level driver
callbacks may be invoked for an inactive cpufreq policy, which isn't
guaranteed to work in general. Both are due to possible races with
CPU offline.
First, in cpufreq_get(), the policy may become inactive after
the check against policy->cpus in cpufreq_cpu_get() and before
policy->rwsem is acquired, in which case using it going forward may
not be correct.
Second, an analogous situation is possible in cpufreq_update_policy().
Avoid using inactive policies by adding policy_is_inactive() checks
to the code in the above places.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Rafael J. Wysocki [Thu, 17 Nov 2016 22:34:17 +0000 (23:34 +0100)]
cpufreq: intel_pstate: Generic governors support
There may be reasons to use generic cpufreq governors (eg. schedutil)
on Intel platforms instead of the intel_pstate driver's internal
governor. However, that currently can only be done by disabling
intel_pstate altogether and using the acpi-cpufreq driver instead
of it, which is subject to limitations.
First of all, acpi-cpufreq only works on systems where the _PSS
object is present in the ACPI tables for all logical CPUs. Second,
on those systems acpi-cpufreq will only use frequencies listed by
_PSS which may be suboptimal. In particular, by convention, the
whole turbo range is represented in _PSS as a single P-state and
the frequency assigned to it is greater by 1 MHz than the greatest
non-turbo frequency listed by _PSS. That may confuse governors to
use turbo frequencies less frequently which may lead to suboptimal
performance.
For this reason, make it possible to use the intel_pstate driver
with generic cpufreq governors as a "normal" cpufreq driver. That
mode is enforced by adding intel_pstate=passive to the kernel
command line and cannot be disabled at run time. In that mode,
intel_pstate provides a cpufreq driver interface including
the ->target() and ->fast_switch() callbacks and is listed in
scaling_driver as "intel_cpufreq".
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Doug Smythies <dsmythies@telus.net>
Rafael J. Wysocki [Thu, 17 Nov 2016 21:47:47 +0000 (22:47 +0100)]
cpufreq: intel_pstate: Request P-states control from SMM if needed
Currently, intel_pstate is unable to control P-states on my
IvyBridge-based Acer Aspire S5, because they are controlled by SMM
on that machine by default and it is necessary to request OS control
of P-states from it via the SMI Command register exposed in the ACPI
FADT. intel_pstate doesn't do that now, but acpi-cpufreq and other
cpufreq drivers for x86 platforms do.
Address this problem by making intel_pstate use the ACPI-defined
mechanism as well. However, intel_pstate is not modular and it
doesn't need the module refcount tricks played by
acpi_processor_notify_smm(), so export the core of this function
to it as acpi_processor_pstate_control() and make it call that.
[The changes in processor_perflib.c related to this should not
make any functional difference for the acpi_processor_notify_smm()
users].
To be safe, only call acpi_processor_notify_smm() from intel_pstate
if ACPI _PPC support is enabled in it.
Suggested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Geert Uytterhoeven [Wed, 16 Nov 2016 10:05:51 +0000 (11:05 +0100)]
cpufreq: dt: Add support for r8a7743 and r8a7745
Add the compatible strings for supporting the generic cpufreq driver on
the Renesas RZ/G1M (r8a7743) and RZ/G1E (r8a7745) SoCs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Denis Kirjanov [Tue, 8 Nov 2016 10:39:28 +0000 (05:39 -0500)]
cpufreq: powernv: Disable preemption while checking CPU throttling state
With preemption turned on we can read incorrect throttling state
while being switched to CPU on a different chip.
BUG: using smp_processor_id() in preemptible [
00000000] code: cat/7343
caller is .powernv_cpufreq_throttle_check+0x2c/0x710
CPU: 13 PID: 7343 Comm: cat Not tainted 4.8.0-rc5-dirty #1
Call Trace:
[
c0000007d25b75b0] [
c000000000971378] .dump_stack+0xe4/0x150 (unreliable)
[
c0000007d25b7640] [
c0000000005162e4] .check_preemption_disabled+0x134/0x150
[
c0000007d25b76e0] [
c0000000007b63ac] .powernv_cpufreq_throttle_check+0x2c/0x710
[
c0000007d25b7790] [
c0000000007b6d18] .powernv_cpufreq_target_index+0x288/0x360
[
c0000007d25b7870] [
c0000000007acee4] .__cpufreq_driver_target+0x394/0x8c0
[
c0000007d25b7920] [
c0000000007b22ac] .cpufreq_set+0x7c/0xd0
[
c0000007d25b79b0] [
c0000000007adf50] .store_scaling_setspeed+0x80/0xc0
[
c0000007d25b7a40] [
c0000000007ae270] .store+0xa0/0x100
[
c0000007d25b7ae0] [
c0000000003566e8] .sysfs_kf_write+0x88/0xb0
[
c0000007d25b7b70] [
c0000000003553b8] .kernfs_fop_write+0x178/0x260
[
c0000007d25b7c10] [
c0000000002ac3cc] .__vfs_write+0x3c/0x1c0
[
c0000007d25b7cf0] [
c0000000002ad584] .vfs_write+0xc4/0x230
[
c0000007d25b7d90] [
c0000000002aeef8] .SyS_write+0x58/0x100
[
c0000007d25b7e30] [
c00000000000bfec] system_call+0x38/0xfc
Fixes:
09a972d16209 (cpufreq: powernv: Report cpu frequency throttling)
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Stratos Karafotis [Wed, 16 Nov 2016 19:27:22 +0000 (21:27 +0200)]
cpufreq: conservative: Fix comment explaining frequency updates
The original comment about the frequency increase to maximum is wrong.
Both increase and decrease happen at steps.
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Stratos Karafotis [Wed, 16 Nov 2016 17:26:29 +0000 (19:26 +0200)]
cpufreq: conservative: Decrease frequency faster for deferred updates
Conservative governor changes the CPU frequency in steps.
That means that if a CPU runs at max frequency, it will need several
sampling periods to return to min frequency when the workload
is finished.
If the update function that calculates the load and target frequency
is deferred, the governor might need even more time to decrease the
frequency.
This may have impact to power consumption and after all conservative
should decrease the frequency if there is no workload at every sampling
rate.
To resolve the above issue calculate the number of sampling periods
that the update is deferred. Considering that for each sampling period
conservative should drop the frequency by a freq_step because the
CPU was idle apply the proper subtraction to requested frequency.
Below, the kernel trace with and without this patch. First an
intensive workload is applied on a specific CPU. Then the workload
is removed and the CPU goes to idle.
WITHOUT
<idle>-0 [007] dN.. 620.329153: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 620.350857: cpu_frequency: state=1700000 cpu_id=7
kworker/7:2-556 [007] .... 620.370856: cpu_frequency: state=1900000 cpu_id=7
kworker/7:2-556 [007] .... 620.390854: cpu_frequency: state=2100000 cpu_id=7
kworker/7:2-556 [007] .... 620.411853: cpu_frequency: state=2200000 cpu_id=7
kworker/7:2-556 [007] .... 620.432854: cpu_frequency: state=2400000 cpu_id=7
kworker/7:2-556 [007] .... 620.453854: cpu_frequency: state=2600000 cpu_id=7
kworker/7:2-556 [007] .... 620.494856: cpu_frequency: state=2900000 cpu_id=7
kworker/7:2-556 [007] .... 620.515856: cpu_frequency: state=3100000 cpu_id=7
kworker/7:2-556 [007] .... 620.536858: cpu_frequency: state=3300000 cpu_id=7
kworker/7:2-556 [007] .... 620.557857: cpu_frequency: state=3401000 cpu_id=7
<idle>-0 [007] d... 669.591363: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 669.591939: cpu_idle: state=
4294967295 cpu_id=7
<idle>-0 [007] d... 669.591980: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] dN.. 669.591989: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 670.201224: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 670.221975: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 670.222016: cpu_frequency: state=3300000 cpu_id=7
<idle>-0 [007] d... 670.222026: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 670.234964: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 670.801251: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 671.236046: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 671.236073: cpu_frequency: state=3100000 cpu_id=7
<idle>-0 [007] d... 671.236112: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 671.393437: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 671.401277: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 671.404083: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 671.404111: cpu_frequency: state=2900000 cpu_id=7
<idle>-0 [007] d... 671.404125: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 671.404974: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 671.501180: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 671.995414: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 671.995459: cpu_frequency: state=2800000 cpu_id=7
<idle>-0 [007] d... 671.995469: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 671.996287: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 672.001305: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.078374: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 672.078410: cpu_frequency: state=2600000 cpu_id=7
<idle>-0 [007] d... 672.078419: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.158020: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 672.158040: cpu_frequency: state=2400000 cpu_id=7
<idle>-0 [007] d... 672.158044: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.160038: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 672.234557: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.237121: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 672.237174: cpu_frequency: state=2100000 cpu_id=7
<idle>-0 [007] d... 672.237186: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.237778: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 672.267902: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.269860: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 672.269906: cpu_frequency: state=1900000 cpu_id=7
<idle>-0 [007] d... 672.269914: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.271902: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 672.751342: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 672.823056: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-556 [007] .... 672.823095: cpu_frequency: state=1600000 cpu_id=7
WITH
<idle>-0 [007] dN.. 4380.928009: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-399 [007] .... 4380.949767: cpu_frequency: state=2000000 cpu_id=7
kworker/7:2-399 [007] .... 4380.969765: cpu_frequency: state=2200000 cpu_id=7
kworker/7:2-399 [007] .... 4381.009766: cpu_frequency: state=2500000 cpu_id=7
kworker/7:2-399 [007] .... 4381.029767: cpu_frequency: state=2600000 cpu_id=7
kworker/7:2-399 [007] .... 4381.049769: cpu_frequency: state=2800000 cpu_id=7
kworker/7:2-399 [007] .... 4381.069769: cpu_frequency: state=3000000 cpu_id=7
kworker/7:2-399 [007] .... 4381.089771: cpu_frequency: state=3100000 cpu_id=7
kworker/7:2-399 [007] .... 4381.109772: cpu_frequency: state=3400000 cpu_id=7
kworker/7:2-399 [007] .... 4381.129773: cpu_frequency: state=3401000 cpu_id=7
<idle>-0 [007] d... 4428.226159: cpu_idle: state=1 cpu_id=7
<idle>-0 [007] d... 4428.226176: cpu_idle: state=
4294967295 cpu_id=7
<idle>-0 [007] d... 4428.226181: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 4428.227177: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 4428.551640: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 4428.649239: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-399 [007] .... 4428.649268: cpu_frequency: state=2800000 cpu_id=7
<idle>-0 [007] d... 4428.649278: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 4428.689856: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 4428.799542: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 4428.801683: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-399 [007] .... 4428.801748: cpu_frequency: state=1700000 cpu_id=7
<idle>-0 [007] d... 4428.801761: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 4428.806545: cpu_idle: state=
4294967295 cpu_id=7
...
<idle>-0 [007] d... 4429.051880: cpu_idle: state=4 cpu_id=7
<idle>-0 [007] d... 4429.086240: cpu_idle: state=
4294967295 cpu_id=7
kworker/7:2-399 [007] .... 4429.086293: cpu_frequency: state=1600000 cpu_id=7
Without the patch the CPU dropped to min frequency after 3.2s
With the patch applied the CPU dropped to min frequency after 0.86s
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Viresh Kumar [Mon, 14 Nov 2016 07:00:43 +0000 (12:30 +0530)]
cpufreq: conservative: Rename get_freq_target() to get_freq_step()
What's returned from this function is the delta by which the frequency
must be increased or decreased and not the final frequency that should
be selected.
Name it properly to match its purpose. Also update the variables used to
store that value.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Akshay Adiga [Mon, 14 Nov 2016 11:59:27 +0000 (17:29 +0530)]
cpufreq: powernv: Fix uninitialized lpstate_idx in gpstates_timer_handler()
lpstate_idx remains uninitialized in the case when elapsed_time
is greater than MAX_RAMP_DOWN_TIME. At the end of rampdown the
global pstate should be equal to the local pstate.
Fixes:
20b15b766354 (cpufreq: powernv: Use PMCR to verify global and localpstate)
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Mon, 14 Nov 2016 18:31:11 +0000 (10:31 -0800)]
cpufreq: intel_pstate: Use CPU load based algorithm for PM_MOBILE
Use get_target_pstate_use_cpu_load() to calculate target P-State for
devices, with the preferred power management profile in ACPI FADT
set to PM_MOBILE.
This may help in resolving some thermal issues caused by low sustained
cpu bound workloads. The current algorithm tend to over provision in this
case as it doesn't look at the CPU busyness.
Also included the fix from Arnd Bergmann <arnd@arndb.de> to solve compile
issue, when CONFIG_ACPI is not defined.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Robert Jarzmik [Mon, 31 Oct 2016 19:54:53 +0000 (20:54 +0100)]
cpufreq: pxa: use generic platdev driver for device-tree
For device-tree based pxa25x and pxa27x platforms, cpufreq-dt driver is
doing the job as well as pxa2xx-cpufreq, so add these platforms to the
compatibility list.
This won't work for legacy non device-tree platforms where
pxa2xx-cpufreq is still required.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Markus Mayer [Mon, 7 Nov 2016 18:02:23 +0000 (10:02 -0800)]
cpufreq: stats: New sysfs attribute for clearing statistics
Allow CPUfreq statistics to be cleared by writing anything to
/sys/.../cpufreq/stats/reset.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Viresh Kumar [Tue, 8 Nov 2016 05:36:33 +0000 (11:06 +0530)]
cpufreq: governor: Don't use 'timer' keyword
The earlier implementation of governors used background timers and so
functions, mutex, etc had 'timer' keyword in their names.
But that's not true anymore. Replace 'timer' with 'update', as those
functions, variables are based around updates to frequency.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Akshay Adiga [Tue, 8 Nov 2016 13:33:28 +0000 (19:03 +0530)]
cpufreq: powernv: Use PMCR to verify global and local pstate
As fast_switch() may get called with interrupt disable mode, we cannot
hold a mutex to update the global_pstate_info. So currently, fast_switch()
does not update the global_pstate_info and it will end up with stale data
whenever pstate is updated through fast_switch().
As the gpstate_timer can fire after fast_switch() has updated the pstates,
the timer handler cannot rely on the cached values of local and global
pstate and needs to read it from the PMCR.
Only gpstate_timer_handler() is affected by the stale cached pstate data
beacause either fast_switch() or target_index() routines will be called
for a given govenor, but gpstate_timer can fire after the governor has
changed to schedutil.
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Akshay Adiga [Tue, 8 Nov 2016 13:33:27 +0000 (19:03 +0530)]
cpufreq: powernv: Adding fast_switch for schedutil
Adding fast_switch which does light weight operation to set the desired
pstate. Both global and local pstates are set to the same desired pstate.
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Wei Yongjun [Thu, 10 Nov 2016 15:19:05 +0000 (15:19 +0000)]
cpufreq: brcmstb-avs-cpufreq: make symbol brcm_avs_cpufreq_attr static
Fixes the following sparse warning:
drivers/cpufreq/brcmstb-avs-cpufreq.c:982:18: warning:
symbol 'brcm_avs_cpufreq_attr' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Fri, 28 Oct 2016 17:44:52 +0000 (10:44 -0700)]
cpufreq: intel_pstate: protect limits variable
The limits variable gets modified from intel_pstate sysfs and also gets
modified from cpufreq sysfs. So protect with a mutex to keep data
integrity, when they are getting modified from multiple threads.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Markus Mayer [Thu, 27 Oct 2016 21:05:36 +0000 (14:05 -0700)]
cpufreq: brcmstb-avs-cpufreq: add debugfs support
In order to aid debugging, we add a debugfs interface to the driver
that allows direct interaction with the AVS co-processor.
The debugfs interface provides a means for reading all and writing some
of the mailbox registers directly from the shell prompt and enables a
user to execute the communications protocol between ARM CPU and AVS CPU
step-by-step.
This interface should be used for debugging purposes only.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Markus Mayer [Thu, 27 Oct 2016 21:05:35 +0000 (14:05 -0700)]
cpufreq: brcmstb-avs-cpufreq: AVS CPUfreq driver for Broadcom STB SoCs
This driver supports voltage and frequency scaling on Broadcom STB SoCs
using AVS firmware with DFS and DVFS support.
Actual frequency or voltage scaling is done exclusively by the AVS
firmware. The driver merely provides a standard CPUfreq interface to
other kernel components and userland, and instructs the AVS firmware to
perform frequency or voltage changes on its behalf.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Markus Mayer [Thu, 27 Oct 2016 21:05:34 +0000 (14:05 -0700)]
dt: cpufreq: brcm: New binding document for brcmstb-avs-cpufreq
Add the binding document for the new brcmstb-avs-cpufreq driver.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Masahiro Yamada [Wed, 26 Oct 2016 16:41:33 +0000 (01:41 +0900)]
cpufreq: dt: add Socionext UniPhier SoCs support
Add compatible strings for Pro5, PXs2, LD6b, LD11, LD20 SoCs to use
the generic cpufreq driver.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Tue, 25 Oct 2016 20:20:43 +0000 (13:20 -0700)]
Documentation: kernel parameters: per core P-State control
Additional command line control to enable per core performance
control.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Tue, 25 Oct 2016 20:20:42 +0000 (13:20 -0700)]
Documentation: intel_pstate: Update per core limits
Document restriction on per core P-State control.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Tue, 25 Oct 2016 20:20:41 +0000 (13:20 -0700)]
cpufreq: intel_pstate: Reduce impact due to rounding error
When policy->max and policy->min are same, in some cases they don't
result in the same frequency cap. The max_policy_pct is rounded up but
not min_perf_pct. So even when they are same, results in different
percentage or maximum and minimum.
Since minimum is a conservative value for power, a lower value without
rounding is better in most of the cases, unless user wants
policy->max = policy->min.
This change uses use the same policy percentage when policy->max and
policy->min are same.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Tue, 25 Oct 2016 20:20:40 +0000 (13:20 -0700)]
cpufreq: intel_pstate: Per CPU P-State limits
Intel P-State offers two interface to set performance limits:
- Intel P-State sysfs
/sys/devices/system/cpu/intel_pstate/max_perf_pct
/sys/devices/system/cpu/intel_pstate/min_perf_pct
- cpufreq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq
In the current implementation both of the above methods, change limits
to every CPU in the system. Moreover the limits placed using cpufreq
policy interface also presented in the Intel P-State sysfs via modified
max_perf_pct and min_per_pct during sysfs reads. This allows to check
percent of reduced/increased performance, irrespective of method used to
limit.
There are some new generations of processors, where it is possible to
have limits placed on individual CPU cores. Using cpufreq interface it
is possible to set limits on each CPU. But the current processing will
use last limits placed on all CPUs. So the per core limit feature of
CPUs can't be used.
This change brings in capability to set P-States limits for each CPU,
with some limitations. In this case what should be the read of
max_perf_pct and min_perf_pct? It can be most restrictive limits placed
on any CPU or max possible performance on any given CPU on which no
limits are placed. In either case someone will have issue.
So the consensus is, we can't have both sysfs controls present when user
wants to use limit per core limits.
- By default per-core-control feature is not enabled. So no one will
notice any difference.
- The way to enable is by kernel command line
intel_pstate=per_cpu_perf_limits
- When the per-core-controls are enabled there is no display of for both
read and write on
/sys/devices/system/cpu/intel_pstate/max_perf_pct
/sys/devices/system/cpu/intel_pstate/min_perf_pct
- User can change limits using
/sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
- User can still observe turbo percent and number of P-States from
/sys/devices/system/cpu/intel_pstate/turbo_pct
/sys/devices/system/cpu/intel_pstate/num_pstates
- User can read write system wide turbo status
/sys/devices/system/cpu/no_turbo
While changing this BUG_ON is changed to WARN_ON, as they are not fatal
errors for the system.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Linus Walleij [Tue, 25 Oct 2016 07:21:25 +0000 (09:21 +0200)]
cpufreq: retire the Integrator cpufreq driver
After switching the core module clocks controlling the Integrator
clock frequencies to the common clock framework, defining the
operating points in the device tree, and activating the generic
DT-based CPUfreq driver, we can retire the old Integrator
cpufreq driver.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Linus Walleij [Tue, 25 Oct 2016 07:21:24 +0000 (09:21 +0200)]
cpufreq: enable the DT cpufreq driver on the Integrators
This enables the generic DT and OPP-based cpufreq driver on the
ARM Integrator/AP and Integrator/CP.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Rafael J. Wysocki [Sun, 30 Oct 2016 05:12:50 +0000 (06:12 +0100)]
Merge back earlier cpufreq material for v4.10.
Rafael J. Wysocki [Mon, 24 Oct 2016 21:20:25 +0000 (23:20 +0200)]
cpufreq: intel_pstate: Always set max P-state in performance mode
The only times at which intel_pstate checks the policy set for
a given CPU is the initialization of that CPU and updates of its
policy settings from cpufreq when intel_pstate_set_policy() is
invoked.
That is insufficient, however, because intel_pstate uses the same
P-state selection function for all CPUs regardless of the policy
setting for each of them and the P-state limits are shared between
them. Thus if the policy is set to "performance" for a particular
CPU, it may not behave as expected if the cpufreq settings are
changed subsequently for another CPU.
That can be easily demonstrated by writing "performance" to
scaling_governor for all CPUs and then switching it to "powersave"
for one of them in which case all of the CPUs will behave as though
their scaling_governor were all "powersave" (even though the policy
still appears to be "performance" for the remaining CPUs).
Fix this problem by modifying intel_pstate_adjust_busy_pstate() to
always set the P-state to the maximum allowed by the current limits
for all CPUs whose policy is set to "performance".
Note that it still is recommended to always change the policy setting
in the same way for all CPUs even with this fix applied to avoid
confusion.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Rafael J. Wysocki [Wed, 19 Oct 2016 00:57:22 +0000 (02:57 +0200)]
cpufreq: intel_pstate: Set P-state upfront in performance mode
After commit
a4675fbc4a7a (cpufreq: intel_pstate: Replace timers with
utilization update callbacks) the cpufreq governor callbacks may not
be invoked on NOHZ_FULL CPUs and, in particular, switching to the
"performance" policy via sysfs may not have any effect on them. That
is a problem, because it usually is desirable to squeeze the last
bit of performance out of those CPUs, so work around it by setting
the maximum P-state (within the limits) in intel_pstate_set_policy()
upfront when the policy is CPUFREQ_POLICY_PERFORMANCE.
Fixes:
a4675fbc4a7a (cpufreq: intel_pstate: Replace timers with utilization update callbacks)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Srinivas Pandruvada [Thu, 20 Oct 2016 20:37:06 +0000 (13:37 -0700)]
Documentation: intel_pstate: PID tuning is not always available
PID tuning is not available when the get_target_pstate_use_cpu_load()
is used to calculate target_state. So update the documentation.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Srinivas Pandruvada [Fri, 21 Oct 2016 16:38:20 +0000 (09:38 -0700)]
cpufreq: intel_pstate: Remove PID debugfs when not used
When target state is calculated using get_target_pstate_use_cpu_load(),
PID controller is not used, hence it has no effect on performance.
So don't present debugfs entries to tune PID controller.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Rafael J. Wysocki [Wed, 19 Oct 2016 00:53:26 +0000 (02:53 +0200)]
cpufreq: intel_pstate: Drop boost_iowait flag
The "IOwait boosting" mechanism is only used by the
get_target_pstate_use_cpu_load() governor function and the
boost_iowait flag in pid_params is always set when that function
is in use (and it is never set otherwise). This means that the
boost_iowait flag is in fact redundant and may be dropped.
For this reason, replace the boost_iowait flag check in
intel_pstate_update_util() with an equivalent check against
pstate_funcs.get_target_pstate and drop that flag.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Prakash, Prashanth [Fri, 14 Oct 2016 18:00:23 +0000 (12:00 -0600)]
cpufreq / CPPC: Add MODULE_DEVICE_TABLE for cppc_cpufreq driver
MODULE_DEVICE_TABLE is added so that CPPC cpufreq module can be
automatically loaded when we have a acpi processor device with
"ACPI0007" hid.
Signed-off-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Sergey Senozhatsky [Mon, 17 Oct 2016 15:41:12 +0000 (00:41 +0900)]
cpufreq: fix overflow in cpufreq_table_find_index_dl()
'best' is always less or equals to 'pos', so `best - pos' returns
a negative value which is then getting casted to `unsigned int'
and passed to __cpufreq_driver_target()->acpi_cpufreq_target()
for policy->freq_table selection. This results in
BUG: unable to handle kernel paging request at
ffff881019b469f8
IP: [<
ffffffffa00356c1>] acpi_cpufreq_target+0x4f/0x190 [acpi_cpufreq]
PGD 267f067
PUD 0
Oops: 0000 [#1] PREEMPT SMP
CPU: 6 PID: 70 Comm: kworker/6:1 Not tainted 4.9.0-rc1-next-
20161017-dbg-dirty
Workqueue: events dbs_work_handler
task:
ffff88041b808000 task.stack:
ffff88041b810000
RIP: 0010:[<
ffffffffa00356c1>] [<
ffffffffa00356c1>] acpi_cpufreq_target+0x4f/0x190 [acpi_cpufreq]
RSP: 0018:
ffff88041b813c60 EFLAGS:
00010282
RAX:
ffff880419b46a00 RBX:
ffff88041b848400 RCX:
ffff880419b20f80
RDX:
00000000001dff38 RSI:
00000000ffffffff RDI:
ffff88041b848400
RBP:
ffff88041b813cb0 R08:
0000000000000006 R09:
0000000000000040
R10:
ffffffff8207f9e0 R11:
ffffffff8173595b R12:
0000000000000000
R13:
ffff88041f1dff38 R14:
0000000000262900 R15:
0000000bfffffff4
FS:
0000000000000000(0000) GS:
ffff88041f000000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
ffff881019b469f8 CR3:
000000041a2d3000 CR4:
00000000001406e0
Stack:
ffff88041b813cb0 ffffffff813347f9 ffff88041b813ca0 ffffffff81334663
ffff88041f1d4bc0 ffff88041b848400 0000000000000000 0000000000000000
0000000000262900 0000000000000000 ffff88041b813d00 ffffffff813355dc
Call Trace:
[<
ffffffff813347f9>] ? cpufreq_freq_transition_begin+0xf1/0xfc
[<
ffffffff81334663>] ? get_cpu_idle_time+0x97/0xa6
[<
ffffffff813355dc>] __cpufreq_driver_target+0x3b6/0x44e
[<
ffffffff81336ca3>] cs_dbs_timer+0x11a/0x135
[<
ffffffff81336fda>] dbs_work_handler+0x39/0x62
[<
ffffffff81057823>] process_one_work+0x280/0x4a5
[<
ffffffff81058719>] worker_thread+0x24f/0x397
[<
ffffffff810584ca>] ? rescuer_thread+0x30b/0x30b
[<
ffffffff81418380>] ? nl80211_get_key+0x29/0x36a
[<
ffffffff8105d2b7>] kthread+0xfc/0x104
[<
ffffffff8107ceea>] ? put_lock_stats.isra.9+0xe/0x20
[<
ffffffff8105d1bb>] ? kthread_create_on_node+0x3f/0x3f
[<
ffffffff814b2092>] ret_from_fork+0x22/0x30
Code: 56 4d 6b ff 0c 41 55 41 54 53 48 83 ec 28 48 8b 15 ad 1e 00 00 44 8b 41
08 48 8b 87 c8 00 00 00 49 89 d5 4e 03 2c c5 80 b2 78 81 <46> 8b 74 38 04 45
3b 75 00 75 11 31 c0 83 39 00 0f 84 1c 01 00
RIP [<
ffffffffa00356c1>] acpi_cpufreq_target+0x4f/0x190 [acpi_cpufreq]
RSP <
ffff88041b813c60>
CR2:
ffff881019b469f8
---[ end trace
16d9fc7a17897d37 ]---
[ rjw: In some cases this bug may also cause incorrect frequencies to
be selected by cpufreq governors. ]
Fixes:
899bb6642f2a (cpufreq: skip invalid entries when searching the frequency)
Link: http://marc.info/?l=linux-kernel&m=147672030714331&w=2
Reported-and-tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reported-and-tested-by: Jörg Otte <jrg.otte@gmail.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.8+ <stable@vger.kernel.org> # 4.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Linus Torvalds [Sat, 15 Oct 2016 19:17:50 +0000 (12:17 -0700)]
Linux 4.9-rc1
Linus Torvalds [Sat, 15 Oct 2016 19:09:13 +0000 (12:09 -0700)]
Merge tag 'befs-v4.9-rc1' of git://github.com/luisbg/linux-befs
Pull befs fixes from Luis de Bethencourt:
"I recently took maintainership of the befs file system [0]. This is
the first time I send you a git pull request, so please let me know if
all the below is OK.
Salah Triki and myself have been cleaning the code and fixing a few
small bugs.
Sorry I couldn't send this sooner in the merge window, I was waiting
to have my GPG key signed by kernel members at ELCE in Berlin a few
days ago."
[0] https://lkml.org/lkml/2016/7/27/502
* tag 'befs-v4.9-rc1' of git://github.com/luisbg/linux-befs: (39 commits)
befs: befs: fix style issues in datastream.c
befs: improve documentation in datastream.c
befs: fix typos in datastream.c
befs: fix typos in btree.c
befs: fix style issues in super.c
befs: fix comment style
befs: add check for ag_shift in superblock
befs: dump inode_size superblock information
befs: remove unnecessary initialization
befs: fix typo in befs_sb_info
befs: add flags field to validate superblock state
befs: fix typo in befs_find_key
befs: remove unused BEFS_BT_PARMATCH
fs: befs: remove ret variable
fs: befs: remove in vain variable assignment
fs: befs: remove unnecessary *befs_sb variable
fs: befs: remove useless initialization to zero
fs: befs: remove in vain variable assignment
fs: befs: Insert NULL inode to dentry
fs: befs: Remove useless calls to brelse in befs_find_brun_dblindirect
...
Linus Torvalds [Sat, 15 Oct 2016 17:03:15 +0000 (10:03 -0700)]
Merge tag 'gcc-plugins-v4.9-rc1' of git://git./linux/kernel/git/kees/linux
Pull gcc plugins update from Kees Cook:
"This adds a new gcc plugin named "latent_entropy". It is designed to
extract as much possible uncertainty from a running system at boot
time as possible, hoping to capitalize on any possible variation in
CPU operation (due to runtime data differences, hardware differences,
SMP ordering, thermal timing variation, cache behavior, etc).
At the very least, this plugin is a much more comprehensive example
for how to manipulate kernel code using the gcc plugin internals"
* tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
latent_entropy: Mark functions with __latent_entropy
gcc-plugins: Add latent_entropy plugin
Linus Torvalds [Sat, 15 Oct 2016 16:26:12 +0000 (09:26 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
"This is the main MIPS pull request for 4.9:
MIPS core arch code:
- traps: 64bit kernels should read CP0_EBase 64bit
- traps: Convert ebase to KSEG0
- c-r4k: Drop bc_wback_inv() from icache flush
- c-r4k: Split user/kernel flush_icache_range()
- cacheflush: Use __flush_icache_user_range()
- uprobes: Flush icache via kernel address
- KVM: Use __local_flush_icache_user_range()
- c-r4k: Fix flush_icache_range() for EVA
- Fix -mabi=64 build of vdso.lds
- VDSO: Drop duplicated -I*/-E* aflags
- tracing: move insn_has_delay_slot to a shared header
- tracing: disable uprobe/kprobe on compact branch instructions
- ptrace: Fix regs_return_value for kernel context
- Squash lines for simple wrapper functions
- Move identification of VP(E) into proc.c from smp-mt.c
- Add definitions of SYNC barrierstype values
- traps: Ensure full EBase is written
- tlb-r4k: If there are wired entries, don't use TLBINVF
- Sanitise coherentio semantics
- dma-default: Don't check hw_coherentio if device is non-coherent
- Support per-device DMA coherence
- Adjust MIPS64 CAC_BASE to reflect Config.K0
- Support generating Flattened Image Trees (.itb)
- generic: Introduce generic DT-based board support
- generic: Convert SEAD-3 to a generic board
- Enable hardened usercopy
- Don't specify STACKPROTECTOR in defconfigs
Octeon:
- Delete dead code and files across the platform.
- Change to use all memory into use by default.
- Rename upper case variables in setup code to lowercase.
- Delete legacy hack for broken bootloaders.
- Leave maintaining the link state to the actual ethernet/PHY drivers.
- Add DTS for D-Link DSR-500N.
- Fix PCI interrupt routing on D-Link DSR-500N.
Pistachio:
- Remove ANDROID_TIMED_OUTPUT from defconfig
TX39xx:
- Move GPIO setup from .mem_setup() to .arch_init()
- Convert to Common Clock Framework
TX49xx:
- Move GPIO setup from .mem_setup() to .arch_init()
- Convert to Common Clock Framework
txx9wdt:
- Add missing clock (un)prepare calls for CCF
BMIPS:
- Add PW, GPIO SDHCI and NAND device node names
- Support APPENDED_DTB
- Add missing bcm97435svmb to DT_NONE
- Rename bcm96358nb4ser to bcm6358-neufbox4-sercom
- Add DT examples for BCM63268, BCM3368 and BCM6362
- Add support for BCM3368 and BCM6362
PCI
- Reduce stack frame usage
- Use struct list_head lists
- Support for CONFIG_PCI_DOMAINS_GENERIC
- Make pcibios_set_cache_line_size an initcall
- Inline pcibios_assign_all_busses
- Split pci.c into pci.c & pci-legacy.c
- Introduce CONFIG_PCI_DRIVERS_LEGACY
- Support generic drivers
CPC
- Convert bare 'unsigned' to 'unsigned int'
- Avoid lock when MIPS CM >= 3 is present
GIC:
- Delete unused file smp-gic.c
mt7620:
- Delete unnecessary assignment for the field "owner" from PCI
BCM63xx:
- Let clk_disable() return immediately if clk is NULL
pm-cps:
- Change FSB workaround to CPU blacklist
- Update comments on barrier instructions
- Use MIPS standard lightweight ordering barrier
- Use MIPS standard completion barrier
- Remove selection of sync types
- Add MIPSr6 CPU support
- Support CM3 changes to Coherence Enable Register
SMP:
- Wrap call to mips_cpc_lock_other in mips_cm_lock_other
- Introduce mechanism for freeing and allocating IPIs
cpuidle:
- cpuidle-cps: Enable use with MIPSr6 CPUs.
SEAD3:
- Rewrite to use DT and generic kernel feature.
USB:
- host: ehci-sead3: Remove SEAD-3 EHCI code
FBDEV:
- cobalt_lcdfb: Drop SEAD3 support
dt-bindings:
- Document a binding for simple ASCII LCDs
auxdisplay:
- img-ascii-lcd: driver for simple ASCII LCD displays
irqchip i8259:
- i8259: Add domain before mapping parent irq
- i8259: Allow platforms to override poll function
- i8259: Remove unused i8259A_irq_pending
Malta:
- Rewrite to use DT
of/platform:
- Probe "isa" busses by default
CM:
- Print CM error reports upon bus errors
Module:
- Migrate exception table users off module.h and onto extable.h
- Make various drivers explicitly non-modular:
- Audit and remove any unnecessary uses of module.h
mailmap:
- Canonicalize to Qais' current email address.
Documentation:
- MIPS supports HAVE_REGS_AND_STACK_ACCESS_API
Loongson1C:
- Add CPU support for Loongson1C
- Add board support
- Add defconfig
- Add RTC support for Loongson1C board
All this except one Documentation fix has sat in linux-next and has
survived Imagination's automated build test system"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (127 commits)
Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API
MIPS: ptrace: Fix regs_return_value for kernel context
MIPS: VDSO: Drop duplicated -I*/-E* aflags
MIPS: Fix -mabi=64 build of vdso.lds
MIPS: Enable hardened usercopy
MIPS: generic: Convert SEAD-3 to a generic board
MIPS: generic: Introduce generic DT-based board support
MIPS: Support generating Flattened Image Trees (.itb)
MIPS: Adjust MIPS64 CAC_BASE to reflect Config.K0
MIPS: Print CM error reports upon bus errors
MIPS: Support per-device DMA coherence
MIPS: dma-default: Don't check hw_coherentio if device is non-coherent
MIPS: Sanitise coherentio semantics
MIPS: PCI: Support generic drivers
MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACY
MIPS: PCI: Split pci.c into pci.c & pci-legacy.c
MIPS: PCI: Inline pcibios_assign_all_busses
MIPS: PCI: Make pcibios_set_cache_line_size an initcall
MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERIC
MIPS: PCI: Use struct list_head lists
...
Linus Torvalds [Sat, 15 Oct 2016 16:20:54 +0000 (09:20 -0700)]
Merge tag 'sound-fix-4.9-rc1' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Just a few trivial small fixes"
* tag 'sound-fix-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: line6: fix a crash in line6_hwdep_write()
ALSA: seq: fix passing wrong pointer in function call of compatibility layer
ALSA: hda - Fix a failure of micmute led when having multi adcs
ALSA: line6: Fix POD X3 Live audio input
Linus Torvalds [Sat, 15 Oct 2016 01:19:05 +0000 (18:19 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull more misc uaccess and vfs updates from Al Viro:
"The rest of the stuff from -next (more uaccess work) + assorted fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
score: traps: Add missing include file to fix build error
fs/super.c: don't fool lockdep in freeze_super() and thaw_super() paths
fs/super.c: fix race between freeze_super() and thaw_super()
overlayfs: Fix setting IOP_XATTR flag
iov_iter: kernel-doc import_iovec() and rw_copy_check_uvector()
blackfin: no access_ok() for __copy_{to,from}_user()
arm64: don't zero in __copy_from_user{,_inatomic}
arm: don't zero in __copy_from_user_inatomic()/__copy_from_user()
arc: don't leak bits of kernel stack into coredump
alpha: get rid of tail-zeroing in __copy_user()
Linus Torvalds [Sat, 15 Oct 2016 00:47:31 +0000 (17:47 -0700)]
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Including:
- nine bug fixes for stable. Some of these we found at the recent two
weeks of SMB3 test events/plugfests.
- significant improvements in reconnection (e.g. if server or network
crashes) especially when mounted with "persistenthandles" or to
server which advertises Continuous Availability on the share.
- a new mount option "idsfromsid" which improves POSIX compatibility
in some cases (when winbind not configured e.g.) by better (and
faster) fetching uid/gid from acl (when "cifsacl" mount option is
enabled). NB: we are almost complete work on "cifsacl" (querying
mode/uid/gid from ACL) for SMB3, but SMB3 support for cifsacl is
not included in this set.
- improved handling for SMB3 "credits" (even if server is buggy)
Still working on two sets of changes:
- cifsacl enablement for SMB3
- cleanup of RFC1001 length calculation (so we can handle encryption
and multichannel and RDMA)
And a couple of new bugs were reported recently (unrelated to above)
so will probably have another merge request next week"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6: (21 commits)
CIFS: Retrieve uid and gid from special sid if enabled
CIFS: Add new mount option to set owner uid and gid from special sids in acl
CIFS: Reset read oplock to NONE if we have mandatory locks after reopen
CIFS: Fix persistent handles re-opening on reconnect
SMB2: Separate RawNTLMSSP authentication from SMB2_sess_setup
SMB2: Separate Kerberos authentication from SMB2_sess_setup
Expose cifs module parameters in sysfs
Cleanup missing frees on some ioctls
Enable previous version support
Do not send SMB3 SET_INFO request if nothing is changing
SMB3: Add mount parameter to allow user to override max credits
fs/cifs: reopen persistent handles on reconnect
Clarify locking of cifs file and tcon structures and make more granular
Fix regression which breaks DFS mounting
fs/cifs: keep guid when assigning fid to fileinfo
SMB3: GUIDs should be constructed as random but valid uuids
Set previous session id correctly on SMB3 reconnect
cifs: Limit the overall credit acquired
Display number of credits available
Add way to query creation time of file via cifs xattr
...
Linus Torvalds [Sat, 15 Oct 2016 00:44:56 +0000 (17:44 -0700)]
Merge branch 'for-linus-4.9' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"Some fixes from Omar and Dave Sterba for our new free space tree.
This isn't heavily used yet, but as we move toward making it the new
default we wanted to nail down an endian bug"
* 'for-linus-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: tests: uninline member definitions in free_space_extent
btrfs: tests: constify free space extent specs
Btrfs: expand free space tree sanity tests to catch endianness bug
Btrfs: fix extent buffer bitmap tests on big-endian systems
Btrfs: catch invalid free space trees
Btrfs: fix mount -o clear_cache,space_cache=v2
Btrfs: fix free space tree bitmaps on big-endian systems
Al Viro [Sat, 15 Oct 2016 00:42:44 +0000 (20:42 -0400)]
Merge branch 'work.uaccess' into for-linus
Guenter Roeck [Wed, 12 Oct 2016 20:42:23 +0000 (13:42 -0700)]
score: traps: Add missing include file to fix build error
score images fail to build as follows.
arch/score/kernel/traps.c: In function 'show_stack':
arch/score/kernel/traps.c:55:3: error:
implicit declaration of function '__get_user'
__get_user() is declared in asm/uaccess.h, which was previously included
through asm/module.h.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Fixes:
88dd4a748da7 ("score: separate extable.h, switch module.h to it")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Oleg Nesterov [Mon, 26 Sep 2016 16:55:25 +0000 (18:55 +0200)]
fs/super.c: don't fool lockdep in freeze_super() and thaw_super() paths
sb_wait_write()->percpu_rwsem_release() fools lockdep to avoid the
false-positives. Now that xfs was fixed by Dave's commit
dbad7c993053
("xfs: stop holding ILOCK over filldir callbacks") we can remove it and
change freeze_super() and thaw_super() to run with s_writers.rw_sem locks
held; we add two trivial helpers for that, lockdep_sb_freeze_release()
and lockdep_sb_freeze_acquire().
xfstests-dev/check `grep -il freeze tests/*/???` does not trigger any
warning from lockdep.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Sat, 15 Oct 2016 00:23:33 +0000 (17:23 -0700)]
Merge branch 'overlayfs-linus' of git://git./linux/kernel/git/mszeredi/vfs
Pull overlayfs updates from Miklos Szeredi:
"This update contains fixes to the "use mounter's permission to access
underlying layers" area, and miscellaneous other fixes and cleanups.
No new features this time"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: use vfs_get_link()
vfs: add vfs_get_link() helper
ovl: use generic_readlink
ovl: explain error values when removing acl from workdir
ovl: Fix info leak in ovl_lookup_temp()
ovl: during copy up, switch to mounter's creds early
ovl: lookup: do getxattr with mounter's permission
ovl: copy_up_xattr(): use strnlen
Oleg Nesterov [Mon, 26 Sep 2016 16:07:48 +0000 (18:07 +0200)]
fs/super.c: fix race between freeze_super() and thaw_super()
Change thaw_super() to check frozen != SB_FREEZE_COMPLETE rather than
frozen == SB_UNFROZEN, otherwise it can race with freeze_super() which
drops sb->s_umount after SB_FREEZE_WRITE to preserve the lock ordering.
In this case thaw_super() will wrongly call s_op->unfreeze_fs() before
it was actually frozen, and call sb_freeze_unlock() which leads to the
unbalanced percpu_up_write(). Unfortunately lockdep can't detect this,
so this triggers misc BUG_ON()'s in kernel/rcu/sync.c.
Reported-and-tested-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Vivek Goyal [Fri, 14 Oct 2016 01:03:36 +0000 (03:03 +0200)]
overlayfs: Fix setting IOP_XATTR flag
ovl_fill_super calls ovl_new_inode to create a root inode for the new
superblock before initializing sb->s_xattr. This wrongly causes
IOP_XATTR to be cleared in i_opflags of the new inode, causing SELinux
to log the following message:
SELinux: (dev overlay, type overlay) has no xattr support
Fix this by initializing sb->s_xattr and similar fields before calling
ovl_new_inode.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Vegard Nossum [Sat, 8 Oct 2016 09:18:07 +0000 (11:18 +0200)]
iov_iter: kernel-doc import_iovec() and rw_copy_check_uvector()
Both import_iovec() and rw_copy_check_uvector() take an array
(typically small and on-stack) which is used to hold an iovec array copy
from userspace. This is to avoid an expensive memory allocation in the
fast path (i.e. few iovec elements).
The caller may have to check whether these functions actually used
the provided buffer or allocated a new one -- but this differs between
the too. Let's just add a kernel doc to clarify what the semantics are
for each function.
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Fri, 14 Oct 2016 22:17:12 +0000 (15:17 -0700)]
Merge tag 'linux-kselftest-4.9-rc1-update' of git://git./linux/kernel/git/shuah/linux-kselftest
Pull kselftest updates from Shuah Khan:
"This update consists of:
- Fixes and improvements to existing tests
- Moving code from Documentation to selftests, samples, and tools:
* Moves dnotify_test, prctl, ptp, vDSO, ia64, watchdog, and
networking tests from Documentation to selftests.
* Moves mic/mpssd, misc-devices/mei, timers, watchdog, auxdisplay,
and blackfin examples from Documentation to samples.
* Moves accounting, laptops/dslm, and pcmcia/crc32hash tools from
Documentation to tools.
* Deletes BUILD_DOCSRC and its dependencies"
* tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (21 commits)
selftests/futex: Check ANSI terminal color support
Doc: update 00-INDEX files to reflect the runnable code move
samples: move blackfin gptimers-example from Documentation
tools: move pcmcia crc32hash tool from Documentation
tools: move laptops dslm tool from Documentation
tools: move accounting tool from Documentation
samples: move auxdisplay example code from Documentation
samples: move watchdog example code from Documentation
samples: move timers example code from Documentation
samples: move misc-devices/mei example code from Documentation
samples: move mic/mpssd example code from Documentation
selftests: Move networking/timestamping from Documentation
selftests: move watchdog tests from Documentation/watchdog
selftests: move ia64 tests from Documentation/ia64
selftests: move vDSO tests from Documentation/vDSO
selftests: move ptp tests from Documentation/ptp
selftests: move prctl tests from Documentation/prctl
selftests: move dnotify_test from Documentation/filesystems
selftests/timers: Add missing error code assignment before test
selftests/zram: replace ZRAM_LZ4_COMPRESS
...
Linus Torvalds [Fri, 14 Oct 2016 22:03:08 +0000 (15:03 -0700)]
Merge branch 'misc' of git://git./linux/kernel/git/mmarek/kbuild
Pull misc kbuild changes from Michal Marek:
"Just a few patches on the kbuild.git#misc branch this time:
- New Coccinelle patch by Nicholas Mc Guire
- Existing patch fixes by Julia Lawall
- Minor comment fix by Markus Elfring"
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
Coccinelle: flag conditions with no effect
scripts/coccicheck: Update reference for the corresponding documentation
Coccinelle: pm_runtime: ensure relevance of pm_runtime reports
Coccinelle: limit memdup_user transformation to GFP_KERNEL case
Linus Torvalds [Fri, 14 Oct 2016 21:26:58 +0000 (14:26 -0700)]
Merge branch 'kbuild' of git://git./linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek:
- EXPORT_SYMBOL for asm source by Al Viro.
This does bring a regression, because genksyms no longer generates
checksums for these symbols (CONFIG_MODVERSIONS). Nick Piggin is
working on a patch to fix this.
Plus, we are talking about functions like strcpy(), which rarely
change prototypes.
- Fixes for PPC fallout of the above by Stephen Rothwell and Nick
Piggin
- fixdep speedup by Alexey Dobriyan.
- preparatory work by Nick Piggin to allow architectures to build with
-ffunction-sections, -fdata-sections and --gc-sections
- CONFIG_THIN_ARCHIVES support by Stephen Rothwell
- fix for filenames with colons in the initramfs source by me.
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (22 commits)
initramfs: Escape colons in depfile
ppc: there is no clear_pages to export
powerpc/64: whitelist unresolved modversions CRCs
kbuild: -ffunction-sections fix for archs with conflicting sections
kbuild: add arch specific post-link Makefile
kbuild: allow archs to select link dead code/data elimination
kbuild: allow architectures to use thin archives instead of ld -r
kbuild: Regenerate genksyms lexer
kbuild: genksyms fix for typeof handling
fixdep: faster CONFIG_ search
ia64: move exports to definitions
sparc32: debride memcpy.S a bit
[sparc] unify 32bit and 64bit string.h
sparc: move exports to definitions
ppc: move exports to definitions
arm: move exports to definitions
s390: move exports to definitions
m68k: move exports to definitions
alpha: move exports to actual definitions
x86: move exports to actual definitions
...
Linus Torvalds [Fri, 14 Oct 2016 21:11:22 +0000 (14:11 -0700)]
Merge tag 'docs-4.9-2' of git://git.lwn.net/linux
Pull one more documentation update from Jonathan Corbet:
"A single commit converting the mac80211 DocBook template over to
Sphinx. Only 32 more to go..."
* tag 'docs-4.9-2' of git://git.lwn.net/linux:
docs-rst: sphinxify 802.11 documentation
Linus Torvalds [Fri, 14 Oct 2016 20:43:08 +0000 (13:43 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma
Pull rdma qedr RoCE driver from Doug Ledford:
"Early on in the merge window I mentioned I had a backlog of new
drivers waiting to be reviewed and that, in addition to the hns-roce
driver, I wanted to get possible a couple more reviewed. I ended up
only having the time to complete one of the additional drivers.
During Dave Miller's pull request this go around, there were a series
of 9 patches to the QLogic qed net driver that add basic support for a
paired RoCE driver. That support is currently not functional because
it is missing the matching RoCE driver in the RDMA subsystem. I
managed to finish that review. However, because it goes against part
of Dave's net pull, and a part that was accepted a day or two after
the merge window opened, to apply cleanly it has to be applied to
either the tip of Dave's net branch, or as I did in this case, I just
applied it to your master after you had taken Dave's pull request."
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
qedr: Add events support and register IB device
qedr: Add GSI support
qedr: Add LL2 RoCE interface
qedr: Add support for data path
qedr: Add support for memory registeration verbs
qedr: Add support for QP verbs
qedr: Add support for PD,PKEY and CQ verbs
qedr: Add support for user context verbs
qedr: Add support for RoCE HW init
qedr: Add RoCE driver framework
Linus Torvalds [Fri, 14 Oct 2016 20:35:05 +0000 (13:35 -0700)]
Merge tag 'for-linus-2' of git://git./linux/kernel/git/dledford/rdma
Pull more rdma updates from Doug Ledford:
"This merge window was the first where Huawei had to try and coordinate
their patches between their net driver and their new roce driver
(similar to mlx4 and mlx5).
They didn't do horribly, but there were some issues (and we knew that
because they simply didn't know what to do in the beginning). As a
result, I had a set of patches that depended on some patches that
normally would have come to you via Dave's tree. Those patches have
been on netdev@ for a while, so I got Dave to give me his approval to
send them to you. As such, the other 29 patches I had behind them are
also now ready to go.
This catches the hns and hns-roce drivers up to current, and for
future patches we are working with them to get them up to speed on how
to do joint driver development so that they don't have these sorts of
cross tree dependency issues again. BTW, Dave gave me permission to
add his Acked-by: to the patches against the net tree, but I've had
this branch through 0day (but not linux-next since it was off by
itself) and I didn't want to rebase the series just to add Dave's ack
for the 8 patches in the net area.
Updates to the hns drivers:
- Small patch set for hns net driver that the roce patches depend on
- Various fixes to the hns-roce driver
- Add connection manager support to the hns-roce driver"
* tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (36 commits)
IB/hns: Fix for removal of redundant code
IB/hns: Delete the redundant lines in hns_roce_v1_m_qp()
IB/hns: Fix the bug when platform_get_resource() exec fail
IB/hns: Update the rq head when modify qp state
IB/hns: Cq has not been freed
IB/hns: Validate mtu when modified qp
IB/hns: Some items of qpc need to take user param
IB/hns: The Ack timeout need a lower limit value
IB/hns: Return bad wr while post send failed
IB/hns: Fix bug of memory leakage for registering user mr
IB/hns: Modify the init of iboe lock
IB/hns: Optimize code of aeq and ceq interrupt handle and fix the bug of qpn
IB/hns: Delete the sqp_start from the structure hns_roce_caps
IB/hns: Fix bug of clear hem
IB/hns: Remove unused parameter named qp_type
IB/hns: Simplify function of pd alloc and qp alloc
IB/hns: Fix bug of using uninit refcount and free
IB/hns: Remove parameters of resize cq
IB/hns: Remove unused parameters in some functions
IB/hns: Add node_guid definition to the bindings document
...
Linus Torvalds [Fri, 14 Oct 2016 20:19:30 +0000 (13:19 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
Pull some more input subsystem updates from Dmitry Torokhov:
"An update to the ALPS driver to support the V8 protocol with
touchstick, a change for i8042 to skip selftest on many Asus laptops
which helps to keep their touchpads working after resume, and a couple
other driver fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: i8042 - skip selftest on ASUS laptops
Input: melfas_mip4 - add ic_name sysfs attribute
Input: melfas_mip4 - add maintainer information
Input: melfas_mip4 - add devicetree binding documentations
Input: elantech - add Fujitsu Lifebook E556 to force crc_enabled
Input: synaptics-rmi4 - fix error handling in I2C transport driver
Input: synaptics-rmi4 - fix error handling in SPI transport driver
Input: ALPS - add V8 protocol documentation
Input: ALPS - set DualPoint flag for 74 03 28 devices
Input: ALPS - allow touchsticks to report pressure
Input: ALPS - handle 0-pressure 1F events
Input: ALPS - add touchstick support for SS5 hardware
Input: elantech - force needed quirks on Fujitsu H760
Input: elantech - fix Lenovo version typo
Linus Torvalds [Fri, 14 Oct 2016 20:13:44 +0000 (13:13 -0700)]
Merge tag 'rtc-4.9' of git://git./linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"RTC for 4.9
Subsystem:
- delete owner assignment in multiple drivers
- constify rtc_class_ops structures
Drivers:
- ac100: support clock-output-names
- cmos: properly handle ACPI alarms and quirky BIOSes and other fixes
- ds1307: fix century bit support while staying comaptible with
previous behaviour by default
- ds1347: switch to regmap
- isl12057 is now handled by ds1307
- omap: support external wakeup
- rv8803: allow to disable voltage drop detection"
* tag 'rtc-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (25 commits)
rtc: rv8803: set VDETOFF and SWOFF via device tree
dt/bindings: Add bindings for Micro Crystal rv8803
devicetree: Add Micro Crystal AG vendor id
rtc: cmos: avoid unused function warning
rtc: ac100: Add NULL checking for devm_kzalloc call
rtc: ds1347: changed raw spi calls to register map calls
rtc: cmos: Restore alarm after resume
rtc: cmos: Clear ACPI-driven alarms upon resume
rtc: omap: Support ext_wakeup configuration
rtc: cmos: Initialize hpet timer before irq is registered
rtc: asm9260: rework locking
rtc: asm9260: allow COMPILE_TEST
rtc: constify rtc_class_ops structures
rtc: ac100: support clock-output-names in device tree binding
rtc: rx6110: remove owner assignment
rtc: pic32: Delete owner assignment
rtc: bq32k: Fix handling of oscillator failure flag
rtc: bq32k: Use correct mask name for 'minutes' register.
rtc: sysfs: fix a cast removing the const attribute
Documentation: dt: Intersil isl12057 is not a trivial device
...
Linus Torvalds [Fri, 14 Oct 2016 20:09:41 +0000 (13:09 -0700)]
Merge branch 'i2c/for-next' of git://git./linux/kernel/git/wsa/linux
Pull more i2c updates from Wolfram Sang:
"A small update pull request from I2C.
This adds one comment to a change we did in this merge window to
handle lockdep better, and pulls in a branch which should have been in
4.8 already improving DT support for I2C"
* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
gpio: pca953x: add a comment explaining the need for a lockdep subclass
i2c: core: Add support for 'i2c-bus' subnode
dt-bindings: i2c: Add support for 'i2c-bus' subnode
Linus Torvalds [Fri, 14 Oct 2016 19:50:05 +0000 (12:50 -0700)]
Merge tag 'acpi-extra-4.9-rc1' of git://git./linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"This includes a couple of fixes needed after recent changes, two ACPI
driver fixes (fan and "Processor Aggregator"), an update of the ACPI
device properties handling code and a new MAINTAINERS entry for ACPI
on ARM64.
Specifics:
- Fix an unused function warning that started to appear after recent
changes in the ACPI EC driver (Eric Biggers).
- Fix the KERN_CONT usage in acpi_os_vprintf() that has become
(particularly) annoying recently (Joe Perches).
- Fix the fan status checking in the ACPI fan driver to avoid
returning incorrect error codes sometimes (Srinivas Pandruvada).
- Fix the ACPI Processor Aggregator driver (PAD) to always let the
special processor_aggregator driver from Xen take over when running
as Xen dom0 (Juergen Gross).
- Update the handling of reference device properties in ACPI by
allowing empty rows ("holes") to appear in reference property lists
(Mika Westerberg).
- Add a new MAINTAINERS entry for ACPI on ARM64 (Lorenzo Pieralisi)"
* tag 'acpi-extra-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
acpi_os_vprintf: Use printk_get_level() to avoid unnecessary KERN_CONT
ACPI / PAD: don't register acpi_pad driver if running as Xen dom0
ACPI / property: Allow holes in reference properties
MAINTAINERS: Add ARM64-specific ACPI maintainers entry
ACPI / EC: Fix unused function warning when CONFIG_PM_SLEEP=n
ACPI / fan: Fix error reading cur_state
Linus Torvalds [Fri, 14 Oct 2016 19:46:13 +0000 (12:46 -0700)]
Merge tag 'pm-extra-4.9-rc1' of git://git./linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"This includes a couple of fixes for cpufreq regressions introduced in
4.8, a rework of the intel_pstate algorithm used on Atom processors
(that took some time to test) plus a fix and a couple of cleanups in
that driver, a CPPC cpufreq driver fix, and a some devfreq fixes and
cleanups (core and exynos-nocp).
Specifics:
- Fix two cpufreq regressions causing undesirable changes in behavior
to appear (one in the core and one in the conservative governor)
introduced during the 4.8 cycle (Aaro Koskinen, Rafael Wysocki).
- Fix the way the intel_pstate driver accesses MSRs related to the
hardware-managed P-states (HWP) feature during the initialization
which currently is unsafe and may cause the processor to generate a
general protection fault (Srinivas Pandruvada).
- Rework the intel_pstate's P-state selection algorithm used on Atom
processors to avoid known problems with the current one and to make
the computation more straightforward, which also happens to improve
performance in multiple benchmarks a bit (Rafael Wysocki).
- Improve two comments in the intel_pstate driver (Rafael Wysocki).
- Fix the desired performance computation in the CPPC cpufreq driver
(Hoan Tran).
- Fix the devfreq core to avoid printing misleading error messages in
some cases (Tobias Jakobi).
- Fix the error code path in devfreq_add_device() to use proper
locking around list modifications (Axel Lin).
- Fix a build failure and remove a couple of redundant updates of
variables in the exynos-nocp devfreq driver (Axel Lin)"
* tag 'pm-extra-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: CPPC: Correct desired_perf calculation
cpufreq: conservative: Fix next frequency selection
cpufreq: skip invalid entries when searching the frequency
cpufreq: intel_pstate: Fix struct pstate_adjust_policy kerneldoc
cpufreq: intel_pstate: Proportional algorithm for Atom
PM / devfreq: Skip status update on uninitialized previous_freq
PM / devfreq: Add proper locking around list_del()
PM / devfreq: exynos-nocp: Remove redundant code
PM / devfreq: exynos-nocp: Select REGMAP_MMIO
cpufreq: intel_pstate: Clarify comment in get_target_pstate_use_performance()
cpufreq: intel_pstate: Fix unsafe HWP MSR access
Steve French [Fri, 14 Oct 2016 00:06:23 +0000 (19:06 -0500)]
CIFS: Retrieve uid and gid from special sid if enabled
New mount option "idsfromsid" indicates to cifs.ko that
it should try to retrieve the uid and gid owner fields
from special sids. This patch adds the code to parse the owner
sids in the ACL to see if they match, and if so populate the
uid and/or gid from them. This is faster than upcalling for
them and asking winbind, and is a fairly common case, and is
also helpful when cifs.upcall and idmapping is not configured.
Signed-off-by: Steve French <steve.french@primarydata.com>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Steve French [Fri, 23 Sep 2016 06:36:34 +0000 (01:36 -0500)]
CIFS: Add new mount option to set owner uid and gid from special sids in acl
Add "idsfromsid" mount option to indicate to cifs.ko that it should
try to retrieve the uid and gid owner fields from special sids in the
ACL if present. This first patch just adds the parsing for the mount
option.
Signed-off-by: Steve French <steve.french@primarydata.com>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Linus Torvalds [Fri, 14 Oct 2016 19:18:50 +0000 (12:18 -0700)]
Merge branch 'for-4.9' of git://git./linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
- tracepoints for basic cgroup management operations added
- kernfs and cgroup path formatting functions updated to behave in the
style of strlcpy()
- non-critical bug fixes
* 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
blkcg: Unlock blkcg_pol_mutex only once when cpd == NULL
cgroup: fix error handling regressions in proc_cgroup_show() and cgroup_release_agent()
cpuset: fix error handling regression in proc_cpuset_show()
cgroup: add tracepoints for basic operations
cgroup: make cgroup_path() and friends behave in the style of strlcpy()
kernfs: remove kernfs_path_len()
kernfs: make kernfs_path*() behave in the style of strlcpy()
kernfs: add dummy implementation of kernfs_path_from_node()
Ram Amrani [Mon, 10 Oct 2016 10:15:39 +0000 (13:15 +0300)]
qedr: Add events support and register IB device
Add error handling support.
Register ib device with ib stack.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:38 +0000 (13:15 +0300)]
qedr: Add GSI support
Add support for GSI over light L2.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:37 +0000 (13:15 +0300)]
qedr: Add LL2 RoCE interface
Add light L2 interface for RoCE.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:36 +0000 (13:15 +0300)]
qedr: Add support for data path
Implement fastpath verbs like ib_send_post, ib_post_recv and ib_poll_cq.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:35 +0000 (13:15 +0300)]
qedr: Add support for memory registeration verbs
Add support for user, dma and memory regions registration.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:34 +0000 (13:15 +0300)]
qedr: Add support for QP verbs
Add support for Queue Pair verbs which adds, deletes,
modifies and queries Queue Pairs.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:33 +0000 (13:15 +0300)]
qedr: Add support for PD,PKEY and CQ verbs
Add support for protection domain and completion queue verbs.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:32 +0000 (13:15 +0300)]
qedr: Add support for user context verbs
Add support for ucontext, query port, add and del gid verbs.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:31 +0000 (13:15 +0300)]
qedr: Add support for RoCE HW init
Allocate and setup RoCE resources, interrupts and completion queues.
Adds device attributes.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Ram Amrani [Mon, 10 Oct 2016 10:15:30 +0000 (13:15 +0300)]
qedr: Add RoCE driver framework
Adds a skeletal implementation of the qed* RoCE driver -
basically the ability to communicate with the qede driver and
receive notifications from it regarding various init/exit events.
Signed-off-by: Rajesh Borundia <rajesh.borundia@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Linus Torvalds [Fri, 14 Oct 2016 18:46:25 +0000 (11:46 -0700)]
Merge branch 'for-4.9' of git://git./linux/kernel/git/tj/percpu
Pull percpu updates from Tejun Heo:
- Nick improved generic implementations of percpu operations which
modify the variable and return so that they calculate the physical
address only once.
- percpu_ref percpu <-> atomic mode switching improvements. The
patchset was originally posted about a year ago but fell through the
crack.
- misc non-critical fixes.
* 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
mm/percpu.c: fix potential memory leakage for pcpu_embed_first_chunk()
mm/percpu.c: correct max_distance calculation for pcpu_embed_first_chunk()
percpu: eliminate two sparse warnings
percpu: improve generic percpu modify-return implementation
percpu-refcount: init ->confirm_switch member properly
percpu_ref: allow operation mode switching operations to be called concurrently
percpu_ref: restructure operation mode switching
percpu_ref: unify staggered atomic switching wait behavior
percpu_ref: reorganize __percpu_ref_switch_to_atomic() and relocate percpu_ref_switch_to_atomic()
percpu_ref: remove unnecessary RCU grace period for staggered atomic switching confirmation
Linus Torvalds [Fri, 14 Oct 2016 18:41:28 +0000 (11:41 -0700)]
Merge branch 'for-4.9' of git://git./linux/kernel/git/tj/libata
Pull libata updates from Tejun Heo:
- Write same support added
- Minor ahci MSIX irq handling updates
- Non-critical SCSI command translation fixes
- Controller specific changes
* 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
ahci: qoriq: Revert "ahci: qoriq: Disable NCQ on ls2080a SoC"
libata: remove <asm-generic/libata-portmap.h>
libata: remove unused definitions from <asm/libata-portmap.h>
pata_at91: Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR
ata: Replace BUG() with BUG_ON().
ata: sata_mv: Replacing dma_pool_alloc and memset with a single call dma_pool_zalloc.
libata: Some drives failing on SCT Write Same
ahci: use pci_alloc_irq_vectors
libata: SCT Write Same handle ATA_DFLAG_PIO
libata: SCT Write Same / DSM Trim
libata: Add support for SCT Write Same
libata: Safely overwrite attached page in WRITE SAME xlat
ahci: also use a per-port lock for the multi-MSIX case
ARM: dts: STiH407-family: Add ports-implemented property in sata nodes
ahci: st: Add ports-implemented property in support
ahci: qoriq: enable snoopable sata read and write
ahci: qoriq: adjust sata parameter
libata-scsi: fix MODE SELECT translation for Control mode page
libata-scsi: use u8 array to store mode page copy
Linus Torvalds [Fri, 14 Oct 2016 18:37:50 +0000 (11:37 -0700)]
Merge tag 'scsi-misc' of git://git./linux/kernel/git/jejb/scsi
Pull more SCSI updates from James Bottomley:
"This is just a set of minor updates and fixes which weren't quite
ready in time for the first pull request.
The only real thing of note is Mike Christie is stepping down as
Maintainer of iscsi to be replaced by Lee Duncan and Chris Leech"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: ufs: Kconfig fix
scsi: g_NCR5380: Stop using scsi_module.c
scsi: g_NCR5380: Reduce overrides[] from array to struct
scsi: g_NCR5380: Remove deprecated __setup
scsi: ufs: Fix error return code in ufshcd_init()
scsi: ufs: Data Segment only needed for WRITE DESCRIPTOR
scsi: cxgb4i: Set completion bit in work request
MAINTAINERS: Update open-iscsi maintainers
scsi: ufs: Enable no vccq quirk for skhynix device
scsi: be2iscsi: mark symbols static where possible
Dave Jones [Fri, 14 Oct 2016 18:26:24 +0000 (14:26 -0400)]
pkeys: Remove easily triggered WARN
This easy-to-trigger warning shows up instantly when running
Trinity on a kernel with CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS disabled.
At most this should have been a printk, but the -EINVAL alone should be more
than adequate indicator that something isn't available.
Signed-off-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 14 Oct 2016 18:11:39 +0000 (11:11 -0700)]
Merge tag 'metag-for-v4.9-rc1' of git://git./linux/kernel/git/jhogan/metag
Pull metag architecture fix from James Hogan:
"A simple build fix for irqsoff atomics which has started hitting
meta1_defconfig during the 4.9 merge window"
* tag 'metag-for-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
metag: Only define atomic_dec_if_positive conditionally
Linus Torvalds [Fri, 14 Oct 2016 18:07:42 +0000 (11:07 -0700)]
Merge tag 'powerpc-4.9-2' of git://git./linux/kernel/git/powerpc/linux
Pull more powerpc updates from Michael Ellerman:
"Some more powerpc updates for 4.9:
Freescale updates from Scott Wood:
- qbman support (a prerequisite for datapath drivers such as ethernet)
- a PCI DMA fix+improvement
- reset handler changes
- more 8xx optimizations
- some cleanups and fixes.'
Fixes:
- selftests/powerpc: Add missing binaries to .gitignores (Michael Ellerman)
- selftests/powerpc: Fix build break caused by EXPORT_SYMBOL changes (Michael Ellerman)
- powerpc/pseries: Fix stack corruption in htpe code (Laurent Dufour)
- powerpc/64s: Fix power4_fixup_nap placement (Nicholas Piggin)
- powerpc/64: Fix incorrect return value from __copy_tofrom_user (Paul Mackerras)
- powerpc/mm/hash64: Fix might_have_hea() check (Michael Ellerman)
Other:
- MAINTAINERS: Remove myself from PA Semi entries (Olof Johansson)
- MAINTAINERS: Drop separate pseries entry (Michael Ellerman)
- MAINTAINERS: Update powerpc website & add selftests (Michael Ellerman):
* tag 'powerpc-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (35 commits)
powerpc/mm/hash64: Fix might_have_hea() check
powerpc/64: Fix incorrect return value from __copy_tofrom_user
powerpc/64s: Fix power4_fixup_nap placement
powerpc/pseries: Fix stack corruption in htpe code
selftests/powerpc: Fix build break caused by EXPORT_SYMBOL changes
MAINTAINERS: Update powerpc website & add selftests
MAINTAINERS: Drop separate pseries entry
MAINTAINERS: Remove myself from PA Semi entries
selftests/powerpc: Add missing binaries to .gitignores
arch/powerpc: Add CONFIG_FSL_DPAA to corenetXX_smp_defconfig
soc/qman: Add self-test for QMan driver
soc/bman: Add self-test for BMan driver
soc/fsl: Introduce DPAA 1.x QMan device driver
soc/fsl: Introduce DPAA 1.x BMan device driver
powerpc/8xx: make user addr DTLB miss the short path
powerpc/8xx: Move additional DTLBMiss handlers out of exception area
powerpc/8xx: use r3 to scratch CR in ITLBmiss
soc/fsl/qe: fix gpio save_regs functions
powerpc/8xx: add dedicated machine check handler
powerpc/8xx: add system_reset_exception
...
Ralf Baechle [Wed, 12 Oct 2016 09:48:39 +0000 (11:48 +0200)]
MIPS: Wire up new pkey_{mprotect,alloc,free} syscalls
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14380/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Rafael J. Wysocki [Fri, 14 Oct 2016 12:10:19 +0000 (14:10 +0200)]
Merge branches 'acpi-fan', 'acpi-ec', 'acpi-drivers' and 'acpi-osl'
* acpi-fan:
ACPI / fan: Fix error reading cur_state
* acpi-ec:
ACPI / EC: Fix unused function warning when CONFIG_PM_SLEEP=n
* acpi-drivers:
ACPI / PAD: don't register acpi_pad driver if running as Xen dom0
* acpi-osl:
acpi_os_vprintf: Use printk_get_level() to avoid unnecessary KERN_CONT
Rafael J. Wysocki [Fri, 14 Oct 2016 12:09:57 +0000 (14:09 +0200)]
Merge branches 'device-properties' and 'acpi-misc'
* device-properties:
ACPI / property: Allow holes in reference properties
* acpi-misc:
MAINTAINERS: Add ARM64-specific ACPI maintainers entry
Rafael J. Wysocki [Fri, 14 Oct 2016 12:09:14 +0000 (14:09 +0200)]
Merge branches 'pm-cpufreq' and 'pm-devfreq'
* pm-cpufreq:
cpufreq: CPPC: Correct desired_perf calculation
cpufreq: conservative: Fix next frequency selection
cpufreq: skip invalid entries when searching the frequency
cpufreq: intel_pstate: Fix struct pstate_adjust_policy kerneldoc
cpufreq: intel_pstate: Proportional algorithm for Atom
cpufreq: intel_pstate: Clarify comment in get_target_pstate_use_performance()
cpufreq: intel_pstate: Fix unsafe HWP MSR access
* pm-devfreq:
PM / devfreq: Skip status update on uninitialized previous_freq
PM / devfreq: Add proper locking around list_del()
PM / devfreq: exynos-nocp: Remove redundant code
PM / devfreq: exynos-nocp: Select REGMAP_MMIO
Miklos Szeredi [Tue, 4 Oct 2016 12:40:45 +0000 (14:40 +0200)]
ovl: use vfs_get_link()
Resulting in a complete removal of a function basically implementing the
inverse of vfs_readlink().
As a bonus, now the proper security hook is also called.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Miklos Szeredi [Tue, 4 Oct 2016 12:40:45 +0000 (14:40 +0200)]
vfs: add vfs_get_link() helper
This helper is for filesystems that want to read the symlink and are better
off with the get_link() interface (returning a char *) rather than the
readlink() interface (copy into a userspace buffer).
Also call the LSM hook for readlink (not get_link) since this is for
symlink reading not following.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>