platform/kernel/linux-exynos.git
13 years agoOMAP2+: hwmod: Update the sysc_cache in case module context is lost
Rajendra Nayak [Tue, 14 Dec 2010 19:42:36 +0000 (12:42 -0700)]
OMAP2+: hwmod: Update the sysc_cache in case module context is lost

Do not skip the sysc programming in the hmwod framework based
on the cached value alone, since at times the module might have lost
context (due to the Powerdomain in which the module belongs
transitions to either Open Switch RET or OFF).

Identifying if a module has lost context requires atleast one
register read, and since a register read has more latency than
a write, it makes sense to do a blind write always.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
13 years agoOMAP2+: hwmod: fix a warning, add some docs, remove unused fields
Paul Walmsley [Tue, 14 Dec 2010 19:42:36 +0000 (12:42 -0700)]
OMAP2+: hwmod: fix a warning, add some docs, remove unused fields

Trivial cleanup and documentation changes on the hwmod code and data:

- add some hwmod documentation to indicate flags that should be moved
  outside the static hwmod data in a future patch

- remove some unused fields in the struct omap_hwmod_ocp_if and
  struct omap_hwmod structures

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
13 years agoOMAP2+: hwmod: upgrade per-hwmod mutex to a spinlock
Paul Walmsley [Tue, 14 Dec 2010 19:42:35 +0000 (12:42 -0700)]
OMAP2+: hwmod: upgrade per-hwmod mutex to a spinlock

Change the per-hwmod mutex to a spinlock.  (The per-hwmod lock
serializes most post-initialization hwmod operations such as enable,
idle, and shutdown.)  Spinlocks are needed, because in some cases,
hwmods must be enabled from timer interrupt disabled-context, such as
an ISR.  The current use-case that is driving this is the OMAP GPIO
block ISR: it can trigger interrupts even with its clocks disabled,
but these clocks are needed for register accesses in the ISR to succeed.

This patch also effectively reverts commit
848240223c35fcc71c424ad51a8e8aef42d3879c - this patch makes
_omap_hwmod_enable() and _omap_hwmod_init() static, renames them back
to _enable() and _idle(), and changes their callers to call the
spinlocking versions.  Previously, since omap_hwmod_{enable,init}()
attempted to take mutexes, these functions could not be called while
the timer interrupt was disabled; but now that the functions use
spinlocks and save and restore the IRQ state, it is appropriate to
call them directly.

Kevin Hilman <khilman@deeprootsystems.com> originally proposed this
patch - thanks Kevin.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Benoît Cousson <b-cousson@ti.com>
13 years agoOMAP2+: hwmod: add support for per-class custom device reset functions
Paul Walmsley [Tue, 14 Dec 2010 19:42:35 +0000 (12:42 -0700)]
OMAP2+: hwmod: add support for per-class custom device reset functions

The standard omap_hwmod.c _reset() code relies on an IP block's
OCP_SYSCONFIG.SOFTRESET register bit to reset the IP block.  This
works for most IP blocks on the chip, but unfortunately not all.  For
example, initiator-only IP blocks often don't have any MPU-accessible
OCP-header registers, and therefore the MPU can't write to any
OCP_SYSCONFIG registers in that block.  Other IP blocks, such as the
IVA and I2C, require a specialized reset sequence.

Since we need to be able to reset these IP blocks as well, allow
custom IP block reset functions to be passed into the hwmod code via a
per-hwmod-class reset function pointer, struct omap_hwmod_class.reset.
If .reset is non-null, then the hwmod _reset() code will call the custom
function instead of the standard OCP SOFTRESET-based code.

As part of this change, rename most of the existing _reset() function
code to _ocp_softreset(), to indicate more clearly that it does not work
for all cases.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Paul Hunt <hunt@ti.com>
Cc: Stanley Liu <stanley_liu@ti.com>
13 years agoOMAP2+: hwmod: add postsetup state
Paul Walmsley [Tue, 14 Dec 2010 19:42:35 +0000 (12:42 -0700)]
OMAP2+: hwmod: add postsetup state

Allow board files and OMAP core code to control the state that some or
all of the hwmods end up in at the end of _setup() (called by
omap_hwmod_late_init() ).  Reimplement the old skip_setup_idle code in
terms of this new postsetup state code.

There are two use-cases for this patch: the !CONFIG_PM_RUNTIME case,
in which all IP blocks should stay enabled after _setup() finishes;
and the MPU watchdog case, in which the watchdog IP block should enter
idle if watchdog coverage of kernel initialization is desired, and
should be disabled otherwise.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Charulatha Varadarajan <charu@ti.com>
13 years agoOMAP2+: hwmod: allow custom pre-shutdown functions
Paul Walmsley [Tue, 14 Dec 2010 19:42:34 +0000 (12:42 -0700)]
OMAP2+: hwmod: allow custom pre-shutdown functions

Some OMAP IP blocks, such as the watchdog timers, cannot be completely
shut down via the standard hwmod shutdown mechanism.  This patch
enables the hwmod data files to supply a pointer to a custom
pre-shutdown function via the struct omap_hwmod_class.pre_shutdown
function pointer.  If the struct omap_hwmod_class.pre_shutdown
function pointer is non-null, the function will be executed before the
existing hwmod shutdown code runs.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
13 years agoOMAP2+: io: split omap2_init_common_hw()
Paul Walmsley [Tue, 21 Dec 2010 22:25:10 +0000 (15:25 -0700)]
OMAP2+: io: split omap2_init_common_hw()

Split omap2_init_common_hw() into two functions.  The first,
omap2_init_common_infrastructure(), initializes the hwmod code and
data, the OMAP PM code, and the clock code and data.  The second,
omap2_init_common_devices(), handles any other early device
initialization that, for whatever reason, has not been or cannot be
moved to initcalls or early platform devices.

This patch is required for the hwmod postsetup patch, which allows
board files to change the state that hwmods should be placed into at
the conclusion of the hwmod _setup() function.  For example, for a
board whose creators wish to ensure watchdog coverage across the
entire kernel boot process, code to change the watchdog's postsetup
state will be added in the board-*.c file between the
omap2_init_common_infrastructure() and omap2_init_common_devices() function
calls.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>
13 years agoMerge branch 'pm-opp' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman...
Tony Lindgren [Wed, 22 Dec 2010 01:05:57 +0000 (17:05 -0800)]
Merge branch 'pm-opp' of ssh:///linux/kernel/git/khilman/linux-omap-pm into omap-for-linus

13 years agoMerge branch 'pm-next' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman...
Tony Lindgren [Wed, 22 Dec 2010 00:53:00 +0000 (16:53 -0800)]
Merge branch 'pm-next' of ssh:///linux/kernel/git/khilman/linux-omap-pm into omap-for-linus

13 years agoMerge branch 'devel-dma' into omap-for-linus
Tony Lindgren [Wed, 22 Dec 2010 00:48:20 +0000 (16:48 -0800)]
Merge branch 'devel-dma' into omap-for-linus

13 years agoOMAP3: ASM sleep code format rework
Jean Pihet [Sat, 18 Dec 2010 15:49:57 +0000 (16:49 +0100)]
OMAP3: ASM sleep code format rework

Cosmetic fixes to the code:
- white spaces and tabs,
- alignement,
- comments rephrase and typos,
- multi-line comments

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: add comments for low power code errata
Jean Pihet [Sat, 18 Dec 2010 15:44:46 +0000 (16:44 +0100)]
OMAP3: add comments for low power code errata

Errata covered:
- 1.157 & 1.185
- i443
- i581

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: rework of the ASM sleep code execution paths
Jean Pihet [Sat, 18 Dec 2010 15:44:45 +0000 (16:44 +0100)]
OMAP3: rework of the ASM sleep code execution paths

- Reworked and simplified the execution paths for better
  readability and to avoid duplication of code,
- Added comments on the entry and exit points and the interaction
  with the ROM code for OFF mode restore,
- Reworked the existing comments for better readability.

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: re-organize the ASM sleep code
Jean Pihet [Sat, 18 Dec 2010 15:44:44 +0000 (16:44 +0100)]
OMAP3: re-organize the ASM sleep code

Organize the code in the following sections:
- register access macros,
- API functions,
- internal functions.

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: remove hardcoded values from the ASM sleep code
Jean Pihet [Sat, 18 Dec 2010 15:44:43 +0000 (16:44 +0100)]
OMAP3: remove hardcoded values from the ASM sleep code

Using macros from existing include files for registers addresses.

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Based on original patch from Vishwa.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Cc: Vishwanath BS <vishwanath.bs@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP2+: use global values for the SRAM PA addresses
Jean Pihet [Sat, 18 Dec 2010 15:44:42 +0000 (16:44 +0100)]
OMAP2+: use global values for the SRAM PA addresses

The SRAM PA addresses are locally defined and used at
different places, i.e. SRAM management code and idle sleep code.

The macros are now defined at a centralized place, for
easier maintenance.

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon<nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: remove unused code from the ASM sleep code
Jean Pihet [Sat, 18 Dec 2010 15:44:41 +0000 (16:44 +0100)]
OMAP3: remove unused code from the ASM sleep code

Remove unused code:
- macros,
- variables,
- unused semaphore locking API. This API shall be added back
  when needed,
- infinite loops for debug.

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Nishanth Menon <nm@ti.com>
Tested-by: Nishanth Menon<nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3630: PM: Erratum i583: disable coreoff if < ES1.2
Eduardo Valentin [Mon, 20 Dec 2010 20:05:09 +0000 (14:05 -0600)]
OMAP3630: PM: Erratum i583: disable coreoff if < ES1.2

Limitation i583: Self_Refresh Exit issue after OFF mode

Issue:
When device is waking up from OFF mode, then SDRC state machine sends
inappropriate sequence violating JEDEC standards.

Impact:
OMAP3630 < ES1.2 is impacted as follows depending on the platform:
CS0: for 38.4MHz as internal sysclk, DDR content seen to be stable, while
for all other sysclk frequencies, varied levels of instability
seen based on varied parameters.
CS1: impacted

This patch takes option #3 as recommended by the Silicon erratum:
Avoid core power domain transitioning to OFF mode. Power consumption
impact is expected in this case.
To do this, we route core OFF requests to RET request on the impacted
revisions of silicon.

Acked-by: Jean Pihet <j-pihet@ti.com>
[nm@ti.com: rebased the code to 2.6.37-rc2- short circuit code changed a bit]
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: PM: make omap3_cpuidle_update_states independent of enable_off_mode
Nishanth Menon [Mon, 20 Dec 2010 20:05:08 +0000 (14:05 -0600)]
OMAP3: PM: make omap3_cpuidle_update_states independent of enable_off_mode

Currently omap3_cpuidle_update_states makes whole sale decision
on which C states to update based on enable_off_mode variable
Instead, achieve the same functionality by independently providing
mpu and core deepest states the system is allowed to achieve and
update the idle states accordingly.

Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
[khilman: fixed additional user of this API in OMAP CPUidle driver]
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3630: PM: Disable L2 cache while invalidating L2 cache
Peter 'p2' De Schrijver [Mon, 20 Dec 2010 20:05:07 +0000 (14:05 -0600)]
OMAP3630: PM: Disable L2 cache while invalidating L2 cache

While coming out of MPU OSWR/OFF states, L2 controller is reseted.
The reset behavior is implementation specific as per ARMv7 TRM and
hence $L2 needs to be invalidated before it's use. Since the
AUXCTRL register is also reconfigured, disable L2 cache before
invalidating it and re-enables it afterwards. This is as per
Cortex-A8 ARM documentation.
Currently this is identified as being needed on OMAP3630 as the
disable/enable is done from "public side" while, on OMAP3430, this
is done in the "secure side".

Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Tony Lindgren <tony@atomide.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
[nm@ti.com: ported to 2.6.37-rc2, added hooks to enable the logic only on 3630]
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Signed-off-by: Peter 'p2' De Schrijver <peter.de-schrijver@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3630: PM: Erratum i608: disable RTA
Nishanth Menon [Mon, 20 Dec 2010 20:05:06 +0000 (14:05 -0600)]
OMAP3630: PM: Erratum i608: disable RTA

Erratum id: i608
RTA (Retention Till Access) feature is not supported and leads to device
stability issues when enabled. This impacts modules with embedded memories
on OMAP3630

Workaround is to disable RTA on boot and coming out of core off.
For disabling RTA coming out of off mode, we do this by overriding the
restore pointer for 3630 as the first point of entry before caches are
touched and is common for GP and HS devices. To disable earlier than
this could be possible by modifying the PPA for HS devices, but not for
GP devices.

Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Tony Lindgren <tony@atomide.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
[ambresh@ti.com: co-developer]
Signed-off-by: Ambresh K <ambresh@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: pm: introduce errata handling
Nishanth Menon [Mon, 20 Dec 2010 20:05:05 +0000 (14:05 -0600)]
OMAP3: pm: introduce errata handling

Introduce errata handling for OMAP3. This patch introduces
errata variable and stub for initialization which will be
filled up by follow-on patches.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: PM: Erratum i581 support: dll kick strategy
Peter 'p2' De Schrijver [Mon, 20 Dec 2010 20:05:04 +0000 (14:05 -0600)]
OMAP3: PM: Erratum i581 support: dll kick strategy

Erratum i581 impacts OMAP3 platforms.
PRCM DPLL control FSM removes SDRC_IDLEREQ before DPLL3 locks causing
the DPLL not to be locked at times.

IMPORTANT:
*) This is not a complete workaround implementation as recommended
by the silicon erratum. This is a support logic for detecting lockups and
attempting to recover where possible and is known to provide stability
in multiple platforms.
*) This code is mostly important for inactive and retention. The ROM code
waits for the maximum DLL lock time when resuming from off mode. So for
off mode this code isn't really needed.
*) counters are introduced here for eventual export to userspace once the
cleanups are completed.

This should eventually get refactored as part of cleanups to sleep34xx.S

Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Peter 'p2' De Schrijver <peter.de-schrijver@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: PM: Update clean_l2 to use v7_flush_dcache_all
Richard Woodruff [Mon, 20 Dec 2010 20:05:03 +0000 (14:05 -0600)]
OMAP3: PM: Update clean_l2 to use v7_flush_dcache_all

Analysis in TI kernel with ETM showed that using cache mapped flush
in kernel instead of SO mapped flush cost drops by 65% (3.39mS down
to 1.17mS) for clean_l2 which is used during sleep sequences.
Overall:
- speed up
- unfortunately there isn't a good alternative flush method today
- code reduction and less maintenance and potential bug in
  unmaintained code

This also fixes the bug with the clean_l2 function usage.

Reported-by: Tony Lindgren <tony@atomide.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Tony Lindgren <tony@atomide.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
[nm@ti.com: ported rkw's proposal to 2.6.37-rc2]
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Richard Woodruff <r-woodruff2@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP3: remove OPP interfaces from OMAP PM layer
Kevin Hilman [Thu, 9 Dec 2010 15:13:48 +0000 (09:13 -0600)]
OMAP3: remove OPP interfaces from OMAP PM layer

With new OPP layer, OPP users will access OPP API directly instead of
using OMAP PM layer, so remove all notions of OPPs from the OMAP PM
layer.

Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoomap4: opp: add OPP table data
Nishanth Menon [Thu, 9 Dec 2010 15:13:47 +0000 (09:13 -0600)]
omap4: opp: add OPP table data

This patch adds OPP tables for OMAP4. New file has been added to keep
the OMAP4 opp tables and the registration of these tables with the
generic opp framework by OMAP SoC OPP interface.

Based on:
http://dev.omapzoom.org/?p=santosh/kernel-omap4-base.git;a=blob;f=arch/arm/mach-omap2/opp44xx_data.c;h=252e3d0cb6050a64f390b9311c1c4977d74f762a;hb=refs/heads/omap4_next

Signed-off-by: Thara Gopinath <thara@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoomap: opp: add OMAP3 OPP table data and common init
Nishanth Menon [Thu, 9 Dec 2010 15:13:46 +0000 (09:13 -0600)]
omap: opp: add OMAP3 OPP table data and common init

Add OPP data for OMAP34xx and OMAP36xx and initialization functions
to populate OPP tables based on current SoC.
introduce an OMAP generic opp initialization routine which OMAP3
and OMAP4+ SoCs can use to register their OPP definitions.

Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP: pm.c correct the initcall for an early init.
Thara Gopinath [Mon, 20 Dec 2010 15:47:21 +0000 (21:17 +0530)]
OMAP: pm.c correct the initcall for an early init.

omap2_common_pm_init is the API where generic system devices like
mpu, l3 etc get initialized. This has to happen really early on
during the boot and not at a later time. This is especially important
with the new opp changes as these devices need to be built before the
opp tables init happen. Today both are device initcalls and it works
just because of the order of compilation. Making this postcore_initcall
is ideal because the omap device layer init happens as a core_initcall
and typically rest of the driver/device inits are arch_initcall or
something lower.

Signed-off-by: Thara Gopinath <thara@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoOMAP2+: disable idle early in the suspend sequence
Jean Pihet [Thu, 9 Dec 2010 17:39:58 +0000 (18:39 +0100)]
OMAP2+: disable idle early in the suspend sequence

Some bad interaction between the idle and the suspend paths has been
identified: the idle code is called during the suspend enter and exit
sequences. This could cause corruption or lock-up of resources.

The solution is to move the calls to disable_hlt at the very beginning
of the suspend sequence (ex. in omap3_pm_begin instead of
omap3_pm_prepare), and the call to enable_hlt at the very end of
the suspend sequence (ex. in omap3_pm_end instead of omap3_pm_finish).

Tested with RET and OFF on Beagle and OMAP3EVM.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
13 years agoLinux 2.6.37-rc7 v2.6.37-rc7
Linus Torvalds [Tue, 21 Dec 2010 19:26:40 +0000 (11:26 -0800)]
Linux 2.6.37-rc7

13 years agoMerge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Tue, 21 Dec 2010 05:34:16 +0000 (21:34 -0800)]
Merge branch 'tty-linus' of git://git./linux/kernel/git/gregkh/tty-2.6

* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  n_gsm: gsm_data_alloc buffer allocation could fail and it is not being checked
  n_gsm: Fix message length handling when building header

13 years agoMerge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Tue, 21 Dec 2010 05:33:12 +0000 (21:33 -0800)]
Merge branch 'usb-linus' of git://git./linux/kernel/git/gregkh/usb-2.6

* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  Revert "USB: gadget: Allow function access to device ID data during bind()"
  USB: misc: uss720.c: add another vendor/product ID
  USB: usb-storage: unusual_devs entry for the Samsung YP-CP3
  USB: gadget: Remove suspended sysfs file before freeing cdev
  USB: core: Add input prompt and help text for USB_OTG config
  USB: ftdi_sio: Add D.O.Tec PID
  xhci: Fix issue with port array setup and buggy hosts.

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Tue, 21 Dec 2010 05:32:20 +0000 (21:32 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: handle partial result from get_user_pages
  ceph: mark user pages dirty on direct-io reads
  ceph: fix null pointer dereference in ceph_init_dentry for nfs reexport
  ceph: fix direct-io on non-page-aligned buffers
  ceph: fix msgr_init error path

13 years agoFix build error in drivers/block/cciss.c
Linus Torvalds [Tue, 21 Dec 2010 05:21:49 +0000 (21:21 -0800)]
Fix build error in drivers/block/cciss.c

.. caused by a missing semi-colon, introduced in commit 0fc13c8995cd
("cciss: fix cciss_revalidate panic").

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: Thiago Farina <tfransosi@gmail.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branches 'devel-iommu-mailbox' and 'devel-l2x0' into omap-for-linus
Tony Lindgren [Tue, 21 Dec 2010 03:13:40 +0000 (19:13 -0800)]
Merge branches 'devel-iommu-mailbox' and 'devel-l2x0' into omap-for-linus

13 years agoomap: rx51: Switch rx51_tpa6130a2_data __initdata to__initdata_or_module
Jarkko Nikula [Sat, 18 Dec 2010 18:17:10 +0000 (18:17 +0000)]
omap: rx51: Switch rx51_tpa6130a2_data __initdata to__initdata_or_module

If the TPA6130 is compiled as module the id and power_gpio values are
arbitrary at module probing time since the rx51_tpa6130a2_data was marked as
__initdata. Fix this by using __initdata_or_module. Then __initdata is
defined only if the kernel is built without CONFIG_MODULES and omitted
otherwise.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap: pandora: fix wifi support
Grazvydas Ignotas [Sun, 19 Dec 2010 22:33:36 +0000 (22:33 +0000)]
omap: pandora: fix wifi support

After commit ed919b0 "mmc: sdio: fix runtime PM anomalies by introducing
MMC_CAP_POWER_OFF_CARD" it is required to specify MMC_CAP_POWER_OFF_CARD
to have runtime PM support. As the wl1251 driver expects card to be
powered down when it's not used, wifi will no longer work after interface
is brought down at least once without functioning runtime PM.

Fix this by declaring MMC_CAP_POWER_OFF_CARD for MMC3.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP4: Pandaboard: Add omap_reserve functionality
Raghuveer Murthy [Sat, 18 Dec 2010 02:15:07 +0000 (18:15 -0800)]
OMAP4: Pandaboard: Add omap_reserve functionality

This patch adds omap_reserve functionality to board-omap4panda.c.
Helps in the reserving boot time memory in SDRAM, used here for
framebuffer allocation.

This patch is in similar lines to commit id 71ee7dad9b6991, from
Russell king

Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Raghuveer Murthy <raghuveer.murthy@ti.com>
[tony@atomide.com: fixed to be before .map_io as pointed out by Russell King]
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap4: Add platform changes for PWM LED
Hemanth V [Sat, 18 Dec 2010 02:15:08 +0000 (18:15 -0800)]
omap4: Add platform changes for PWM LED

Register TWL6030 PWM, which is used as charging LED

Signed-off-by: Hemanth V <hemanthv@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap4: Add platform changes for Ambient Light sensor
Hemanth V [Sat, 18 Dec 2010 02:15:08 +0000 (18:15 -0800)]
omap4: Add platform changes for Ambient Light sensor

Register BH1780GLI Ambient light sensor, which is an I2C device
for 4430SDP board.

Signed-off-by: Hemanth V <hemanthv@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap3: igepv2: LED gpio-led:green:d1 is active low
Laurent Pinchart [Sat, 18 Dec 2010 02:15:08 +0000 (18:15 -0800)]
omap3: igepv2: LED gpio-led:green:d1 is active low

Make sure the LED is turned off at boot time, and configure the GPIO LED
device as active low.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap3: igepv2: Don't call gpio_set_value right aftergpio_direction_output
Laurent Pinchart [Sat, 18 Dec 2010 02:15:07 +0000 (18:15 -0800)]
omap3: igepv2: Don't call gpio_set_value right aftergpio_direction_output

gpio_direction_output() has a value argument, there's no need to call
gpio_set_value() explicitly right after.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap1: Fix innovator FPGA init for multi-omap
Tony Lindgren [Sat, 18 Dec 2010 02:37:08 +0000 (18:37 -0800)]
omap1: Fix innovator FPGA init for multi-omap

No need to call this early from init_irq. Also recent changes
initialize GPIO now later, so calling gpio_request from init_irq
will make it fail.

While at it, also remove the unnecessary EXPORT_SYMBOL.

Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoFix IGEPv2 second MMC channel power supply
Marc Zyngier [Tue, 21 Dec 2010 02:48:16 +0000 (18:48 -0800)]
Fix IGEPv2 second MMC channel power supply

Commit 72f381ba056 (omap3: Remove VMMC2 regulator on IGEP v2)
removed an unused regulator entry, but left the second MMC channel
(used by the Libertas WLAN module) without link to power regulator.
This causes the SDIO module to fail being detected.

This patch adds the two regulators that actually feed the WLAN module
(1v8 from the TWL4030 VIO LDO, and a fixed 3v3). With that patch, the
second channel is properly detected. Details of the power supply
implementation were kindly provided by Enric Balletbo i Serra.

Also change vmmc1 to use symbolic names instead of direct device
reference.

Tested on an IGEPv2 Rev-B.

Signed-off-by: Marc Zyngier <maz@misterjones.org>
Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap2430: hwmod: remove stray declaration
Anand Gadiyar [Tue, 21 Dec 2010 02:48:16 +0000 (18:48 -0800)]
omap2430: hwmod: remove stray declaration

Patch "OMAP2xxx: hwmod: add I2C hwmods for OMAP2420, 2430"
in linux-next as of 20101203 introduced the following build
warning - fix this by removing the stray i2c_dev_attr.

arch/arm/mach-omap2/omap_hwmod_2430_data.c:483: warning: 'i2c_dev_attr' defined but not used

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoAdded video data to support tvout on rx51
Srikar [Tue, 21 Dec 2010 02:48:16 +0000 (18:48 -0800)]
Added video data to support tvout on rx51

To support tvout on rx51,added Intilization data,
tvout as display device and enabled venc through gpio
on rx51

Signed-off-by: Srikar <ext-srikar.1.bhavanarayana@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap: rx51: Add supplies and data for codec b part ofTLV320AIC34
Jarkko Nikula [Tue, 21 Dec 2010 02:48:16 +0000 (18:48 -0800)]
omap: rx51: Add supplies and data for codec b part ofTLV320AIC34

Upcoming ASoC core and tlv320aic3x changes makes possible to take b part of
TLV320AIC34 into use on RX51/N900. Prepare to this by adding virtual supplies
and platform data for b part of the codec.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap: rx51: Remove extra tlv320aic3x.h inclusion
Jarkko Nikula [Tue, 21 Dec 2010 02:48:15 +0000 (18:48 -0800)]
omap: rx51: Remove extra tlv320aic3x.h inclusion

Remove second tlv320aic3x.h inclusion that came along the commit f0fba2a
"ASoC: multi-component - ASoC Multi-Component Support".

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: mach-omap2: Kconfig: fix incorrect option
Aaro Koskinen [Tue, 21 Dec 2010 02:48:15 +0000 (18:48 -0800)]
arm: mach-omap2: Kconfig: fix incorrect option

There is no MFD config option, MFD_SUPPORT should be selected instead.
This will prevent build errors when trying out different configurations.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: mach-omap2: hsmmc_reset: fix clk_get() error handling
Aaro Koskinen [Tue, 21 Dec 2010 02:48:15 +0000 (18:48 -0800)]
arm: mach-omap2: hsmmc_reset: fix clk_get() error handling

clk_get() return value should be checked with IS_ERR(). Furthermore,
clocks should be put and disabled properly.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP: DMA: Convert DMA library into platform driver
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:19 +0000 (18:27 -0800)]
OMAP: DMA: Convert DMA library into platform driver

Convert DMA library into DMA platform driver and make use of
platform data provided by hwmod data base for OMAP2+ onwards.

For OMAP1 processors, the DMA driver in mach-omap uses resource
structures for getting platform data.

Thanks to Tony Lindgren <tony@atomide.com> for fixing various
omap1 issues and testing the same on OSK5912 board.

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP2+: DMA: hwmod: Device registration
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:19 +0000 (18:27 -0800)]
OMAP2+: DMA: hwmod: Device registration

Prepare OMAP2+ DMA to use hwmod infrastructure so that DMA can register
as platform device.

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP1: DMA: Implement in platform device model
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:19 +0000 (18:27 -0800)]
OMAP1: DMA: Implement in platform device model

Implement OMAP1 DMA as platform device and add support for
registering through platform device layer using resource
structures.

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP4: hwmod data: add system DMA
Benoit Cousson [Tue, 21 Dec 2010 02:27:19 +0000 (18:27 -0800)]
OMAP4: hwmod data: add system DMA

Add OMAP4 DMA hwmod data. In addition to original dma hwmod data,
the following changes are added.

1. DMA device attributes structure is introduced for diffenrenciating
OMAP cpu's based on DMA features.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP3: hwmod data: add system DMA
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:19 +0000 (18:27 -0800)]
OMAP3: hwmod data: add system DMA

Add OMAP3 DMA hwmod data

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP2430: hwmod data: add system DMA
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:18 +0000 (18:27 -0800)]
OMAP2430: hwmod data: add system DMA

Add OMAP2430 DMA hwmod data and also add required
DMA device attributes.

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP2420: hwmod data: add system DMA
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:18 +0000 (18:27 -0800)]
OMAP2420: hwmod data: add system DMA

Add OMAP2420 DMA hwmod data and also add required
DMA device attributes.

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP: DMA: Introduce errata handling feature
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:18 +0000 (18:27 -0800)]
OMAP: DMA: Introduce errata handling feature

Implement errata handling to use flags instead of cpu_is_* and
cpu_class_* in the code.

The errata flags are initialized at init time and during runtime we are
using the errata variable (via the IS_DMA_ERRATA macro) to execute the
required errata workaround.

Reused errata handling patch from: Peter Ujfalusi
<peter.ujfalusi@nokia.com>
https://patchwork.kernel.org/patch/231191/

Changes to above patch:
1. Changes are done for converting all the existing errata work arounds
to use this feature.
2. Detailed description for each errata is added.
3. Fixed bug in SET_DMA_ERRATA macro
4. Bit shifting in macro definitions are replaced with BIT() macro

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP: DMA: Replace read/write macros with functions
G, Manjunath Kondaiah [Tue, 21 Dec 2010 02:27:17 +0000 (18:27 -0800)]
OMAP: DMA: Replace read/write macros with functions

Prepare DMA library to get converted into DMA driver using platform
device model and hwmod infrastucture(for omap2+, resource structures
for omap1)

The low level read/write macros are replaced with static inline
functions and register offsets are handled through static register
offset tables mapped through  enumeration constants.

These low level read/write functions along with static register offset
tables will be moved to respective mach-omap dma files in the later
patches of this series.

There are no functionality changes with these changes except change in
logic for handling 16bit registers of OMAP1.

Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoI2C: i2c-omap: Change device name: i2c_omap -> omap_i2c
Benoit Cousson [Thu, 9 Dec 2010 14:24:16 +0000 (14:24 +0000)]
I2C: i2c-omap: Change device name: i2c_omap -> omap_i2c

The convention for omap device naming is omap_XXX.

Rename the device and driver name in order to stick
to this naming convention.

Change device name in clock nodes as well.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Ben Dooks <ben-i2c@fluff.org>
Acked-by: Paul Walmsley <paul@pwsan.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap1: pm_bus: Fix compilation warning
Marek Belisko [Mon, 6 Dec 2010 13:23:48 +0000 (13:23 +0000)]
omap1: pm_bus: Fix compilation warning

Fix following compilation warning:
arch/arm/mach-omap1/pm_bus.c: In function 'omap1_pm_runtime_resume':
arch/arm/mach-omap1/pm_bus.c:51: warning: unused variable 'ret'

Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap1: htc_herald: Fix compilation warning
Marek Belisko [Mon, 6 Dec 2010 12:49:05 +0000 (12:49 +0000)]
omap1: htc_herald: Fix compilation warning

Patch fix following compilation warning:
arch/arm/mach-omap1/board-htcherald.c:442:
warning: large integer implicitly truncated to unsigned type

Hopefully this is just a typo.

Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap: serial: Change device name: omap-hsuart -> omap_uart
Benoit Cousson [Thu, 9 Dec 2010 14:24:17 +0000 (14:24 +0000)]
omap: serial: Change device name: omap-hsuart -> omap_uart

The naming convention for omap_device is omap_XXX.

Rename the device and driver name in order to stick
to this naming convention.
Remove the hs prefix that is implicit for every OMAP uarts.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Acked-by: Govindraj Raja <govindraj.raja@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoMerge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Mon, 20 Dec 2010 18:35:04 +0000 (10:35 -0800)]
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-2.6

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  [media] gspca - sonixj: Better handling of the bridge registers 0x01 and 0x17
  [media] gspca - sonixj: Add the bit definitions of the bridge reg 0x01 and 0x17
  [media] gspca - sonixj: Set the flag for some devices
  [media] gspca - sonixj: Add a flag in the driver_info table
  [media] gspca - sonixj: Fix a bad probe exchange
  [media] gspca - sonixj: Move bridge init to sd start
  [media] bttv: remove unneeded locking comments
  [media] bttv: fix mutex use before init (BZ#24602)
  [media] Don't export format_by_forcc on two different drivers

13 years agoMerge branch 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 20 Dec 2010 17:59:08 +0000 (09:59 -0800)]
Merge branch 'rmobile-fixes-for-linus' of git://git./linux/kernel/git/lethal/sh-2.6

* 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  ARM: mach-shmobile: INTC interrupt priority level demux fix
  ARM: mach-shmobile: fix compile warning in mm/init.c

13 years agoMerge branch 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 20 Dec 2010 17:53:50 +0000 (09:53 -0800)]
Merge branch 'sh-fixes-for-linus' of git://git./linux/kernel/git/lethal/sh-2.6

* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  clocksource: sh_cmt: Remove nested spinlock fix

13 years agoMerge branch 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 20 Dec 2010 17:49:54 +0000 (09:49 -0800)]
Merge branch 'fbdev-fixes-for-linus' of git://git./linux/kernel/git/lethal/fbdev-2.6

* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6:
  OMAP: OMAPFB: disable old omapfb for OMAP4 builds
  OMAP: DSS: VRAM: Align start & size of vram to 2M

13 years agoMerge branch 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 20 Dec 2010 17:46:46 +0000 (09:46 -0800)]
Merge branch 's5p-fixes-for-linus' of git://git./linux/kernel/git/kgene/linux-samsung

* 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: S5PV210: update MAX8998 platform data to get rid of WARN()
  ARM S3C24XX: Fix compilation of PM code for S3C2416
  ARM: S3C24XX: Fix CONFIG_S3C_DEV_NAND Kconfig entry

13 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Mon, 20 Dec 2010 17:19:46 +0000 (09:19 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  cciss: fix cciss_revalidate panic
  block: max hardware sectors limit wrapper
  block: Deprecate QUEUE_FLAG_CLUSTER and use queue_limits instead
  blk-throttle: Correct the placement of smp_rmb()
  blk-throttle: Trim/adjust slice_end once a bio has been dispatched
  block: check for proper length of iov entries earlier in blk_rq_map_user_iov()
  drbd: fix for spin_lock_irqsave in endio callback
  drbd: don't recvmsg with zero length

13 years agoFix btrfs b0rkage
Al Viro [Mon, 20 Dec 2010 15:53:18 +0000 (15:53 +0000)]
Fix btrfs b0rkage

Buggered-in: 76dda93c6ae2 ("Btrfs: add snapshot/subvolume destroy
ioctl")

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoclarify a usage constraint for cnt32_to_63()
Nicolas Pitre [Mon, 20 Dec 2010 05:29:32 +0000 (00:29 -0500)]
clarify a usage constraint for cnt32_to_63()

The cnt32_to_63 algorithm relies on proper counter data evaluation
ordering to work properly. This was missing from the provided
documentation.

Let's augment the documentation with the missing usage constraint and
fix the only instance that got it wrong.

Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 20 Dec 2010 17:05:26 +0000 (09:05 -0800)]
Merge branch 'sched-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Remove debugging check

13 years agosched: Remove debugging check
Ingo Molnar [Sun, 19 Dec 2010 22:24:27 +0000 (23:24 +0100)]
sched: Remove debugging check

Linus reported that the new warning introduced by commit f26f9aff6aaf
"Sched: fix skip_clock_update optimization" triggers. The need_resched
flag can be set by other CPUs asynchronously so this debug check is
bogus - remove it.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <AANLkTinJ8hAG1TpyC+CSYPR47p48+1=E7fiC45hMXT_1@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
13 years agoMerge branches 'x86-fixes-for-linus' and 'perf-fixes-for-linus' of git://git.kernel...
Linus Torvalds [Sun, 19 Dec 2010 18:44:54 +0000 (10:44 -0800)]
Merge branches 'x86-fixes-for-linus' and 'perf-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86-32: Make sure we can map all of lowmem if we need to
  x86, vt-d: Handle previous faults after enabling fault handling
  x86: Enable the intr-remap fault handling after local APIC setup
  x86, vt-d: Fix the vt-d fault handling irq migration in the x2apic mode
  x86, vt-d: Quirk for masking vtd spec errors to platform error handling logic
  x86, xsave: Use alloc_bootmem_align() instead of alloc_bootmem()
  bootmem: Add alloc_bootmem_align()
  x86, gcc-4.6: Use gcc -m options when building vdso
  x86: HPET: Chose a paranoid safe value for the ETIME check
  x86: io_apic: Avoid unused variable warning when CONFIG_GENERIC_PENDING_IRQ=n

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf: Fix off by one in perf_swevent_init()
  perf: Fix duplicate events with multiple-pmu vs software events
  ftrace: Have recordmcount honor endianness in fn_ELF_R_INFO
  scripts/tags.sh: Add magic for trace-events
  tracing: Fix panic when lseek() called on "trace" opened for writing

13 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 19 Dec 2010 18:37:37 +0000 (10:37 -0800)]
Merge branch 'sched-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Fix the irqtime code for 32bit
  sched: Fix the irqtime code to deal with u64 wraps
  nohz: Fix get_next_timer_interrupt() vs cpu hotplug
  Sched: fix skip_clock_update optimization
  sched: Cure more NO_HZ load average woes

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Linus Torvalds [Sat, 18 Dec 2010 18:28:54 +0000 (10:28 -0800)]
Merge git://git./linux/kernel/git/cmetcalf/linux-tile

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: handle rt_sigreturn() more cleanly
  arch/tile: handle CLONE_SETTLS in copy_thread(), not user space

13 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Sat, 18 Dec 2010 18:23:29 +0000 (10:23 -0800)]
Merge branch 'upstream' of git://git.linux-mips.org/upstream-linus

* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus:
  MIPS: Fix build errors in sc-mips.c

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...
Linus Torvalds [Sat, 18 Dec 2010 18:13:24 +0000 (10:13 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jbarnes/pci-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  x86: avoid high BIOS area when allocating address space
  x86: avoid E820 regions when allocating address space
  x86: avoid low BIOS area when allocating address space
  resources: add arch hook for preventing allocation in reserved areas
  Revert "resources: support allocating space within a region from the top down"
  Revert "PCI: allocate bus resources from the top down"
  Revert "x86/PCI: allocate space from the end of a region, not the beginning"
  Revert "x86: allocate space within a region top-down"
  Revert "PCI: fix pci_bus_alloc_resource() hang, prefer positive decode"
  PCI: Update MCP55 quirk to not affect non HyperTransport variants

13 years agoomap4: l2x0: Enable early BRESP bit
Santosh Shilimkar [Fri, 19 Nov 2010 17:31:06 +0000 (23:01 +0530)]
omap4: l2x0: Enable early BRESP bit

The AXI protocol specifies that the write response can only
be sent back to an AXI master when the last write data has been
accepted. This optimization enables the PL310 to send the write
response of certain write transactions as soon as the store buffer
accepts the write address. This behavior is not compatible with
the AXI protocol and is disabled by default. You enable this
optimization by setting the Early BRESP Enable bit in the
Auxiliary Control Register (bit [30]).

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Mans Rullgard <mans@mansr.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap4: l2x0: Set share override bit
Santosh Shilimkar [Fri, 19 Nov 2010 17:31:05 +0000 (23:01 +0530)]
omap4: l2x0: Set share override bit

Clearing bit 22 in the PL310 Auxiliary Control register (shared
attribute override enable) has the side effect of transforming Normal
Shared Non-cacheable reads into Cacheable no-allocate reads.

Coherent DMA buffers in Linux always have a Cacheable alias via the
kernel linear mapping and the processor can speculatively load cache
lines into the PL310 controller. With bit 22 cleared, Non-cacheable
reads would unexpectedly hit such cache lines leading to buffer
corruption

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap4: l2x0: enable instruction and data prefetching
Mans Rullgard [Fri, 19 Nov 2010 17:31:04 +0000 (23:01 +0530)]
omap4: l2x0: enable instruction and data prefetching

Enabling L2 prefetching improves performance as shown on Panda
ES2.1 board with mem test, and it has measurable impact on
performances. I think we should consider it, even though it damages
"writes" a bit. (rebased to k.org)
Usually the prefetch is used at both levels together L1 + L2, however,
to enable the CP15 prefetch engines, these are under security, and on
GP devices, we cannot enable it(e.g. on PandaBoard). However, just
enabling PL310 prefetch seems to provide performance improvement,
as shown in the data below (from Ubuntu) and would be a great thing
to pull in.

What prefetch does is enable automatic next line prefetching. With this
enabled, whenever the PL310 receives a cachable read request, it
automatically prefetches the following cache line as well.

Measurement Data:
==
STOCK 10.10 WITHOUT PATCH

========================
~# ./memspeed
size    8388608 8192k 8M
offset  8388608, 0
buffers 0x2aaad000 0x2b2ad000
copy  libc          133 MB/s
copy  Android v5    273 MB/s
copy  Android NEON  235 MB/s
copy  INT32         116 MB/s
copy  ASM ARM       187 MB/s
copy  ASM VLDM 64   204 MB/s
copy  ASM VLDM 128  173 MB/s
copy  ASM VLD1      216 MB/s
read  ASM ARM       286 MB/s
read  ASM VLDM      242 MB/s
read  ASM VLD1      286 MB/s
write libc         1947 MB/s
write ASM ARM      1943 MB/s
write ASM VSTM     1942 MB/s
write ASM VST1     1935 MB/s

10.10 + PATCH
=============
~# ./memspeed
size    8388608 8192k 8M
offset  8388608, 0
buffers 0x2ab17000 0x2b317000
copy  libc          129 MB/s
copy  Android v5    256 MB/s
copy  Android NEON  356 MB/s
copy  INT32         127 MB/s
copy  ASM ARM       321 MB/s
copy  ASM VLDM 64   337 MB/s
copy  ASM VLDM 128  321 MB/s
copy  ASM VLD1      350 MB/s
read  ASM ARM       496 MB/s
read  ASM VLDM      470 MB/s
read  ASM VLD1      488 MB/s
write libc         1701 MB/s
write ASM ARM      1682 MB/s
write ASM VSTM     1693 MB/s
write ASM VST1     1681 MB/s

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap4: l2x0: Construct the AUXCTRL value using defines
Santosh Shilimkar [Fri, 19 Nov 2010 17:31:03 +0000 (23:01 +0530)]
omap4: l2x0: Construct the AUXCTRL value using defines

This patch removes the hardcoded value of auxctrl value and
construct it using bitfields

Bit 25 is reserved and is always set to 1. Same value
of this bit is retained in this patch

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoARM: l2x0: Add aux control register bitfields
Santosh Shilimkar [Fri, 19 Nov 2010 17:31:02 +0000 (23:01 +0530)]
ARM: l2x0: Add aux control register bitfields

This patch adds the PL310 Auxiliary Control Register bitfields
so that SOC's can use these bit fields to construct the AUXCTRL
value to be passed/programmed instead of hardcoding it.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoMerge branch 'for_2.6.38' of git://gitorious.org/iommu_mailbox/iommu_mailbox into...
Tony Lindgren [Sat, 18 Dec 2010 03:19:50 +0000 (19:19 -0800)]
Merge branch 'for_2.6.38' of git://gitorious.org/iommu_mailbox/iommu_mailbox into devel-iommu-mailbox

13 years agoomap: remove dead wdt code in plat-omap/devices.c
Anand Gadiyar [Fri, 3 Dec 2010 17:26:56 +0000 (17:26 +0000)]
omap: remove dead wdt code in plat-omap/devices.c

Commit f2ce62312650 (OMAP: WDT: Split OMAP1 and OMAP2PLUS device
registration) removed omap_init_wdt and related structures from
plat-omap/devices.c. However a subsequent commit or merge
seems to have reintroduced these by accident. The caller of
omap_init_wdt was also removed by that commit, and this did
not get restored. So we have the following build warning now:

  CC      arch/arm/plat-omap/devices.o
arch/arm/plat-omap/devices.c:252: warning: 'omap_init_wdt' defined but not used

Fix this by removing this dead code.

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP4: enable smc instruction in new assembler versions
John Rigby [Wed, 1 Dec 2010 05:57:51 +0000 (05:57 +0000)]
OMAP4: enable smc instruction in new assembler versions

New assemblers need -march=armv7-a+sec on command line or
.arch_extension sec inline to enable use of the smc instruction.

This patch uses as-instr to check the latter to conditionally
enable the former in AFLAGS for files that use smc.

Checked on both old and new binutils to verify that it does
not break old versions.

Signed-off-by: John Rigby <john.rigby@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap: kill all section mismatch warning for omap2plus_defconfig
Bryan Wu [Wed, 8 Dec 2010 02:41:25 +0000 (02:41 +0000)]
omap: kill all section mismatch warning for omap2plus_defconfig

This patch will kill following section mismatch warnings:

WARNING: vmlinux.o(.text+0x24a00): Section mismatch in reference from the function zoom_twl_gpio_setup() to the (unknown reference) .init.data:(unknown)
The function zoom_twl_gpio_setup() references
the (unknown reference) __initdata (unknown).
This is often because zoom_twl_gpio_setup lacks a __initdata
annotation or the annotation of (unknown) is wrong.

WARNING: vmlinux.o(.text+0x24bfc): Section mismatch in reference from the function cm_t35_twl_gpio_setup() to the (unknown reference) .init.data:(unknown)
The function cm_t35_twl_gpio_setup() references
the (unknown reference) __initdata (unknown).
This is often because cm_t35_twl_gpio_setup lacks a __initdata
annotation or the annotation of (unknown) is wrong.

WARNING: vmlinux.o(.data+0x1d3e0): Section mismatch in reference from the variable h4_config to the (unknown reference) .init.data:(unknown)
The variable h4_config references
the (unknown reference) __initdata (unknown)
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: vmlinux.o(.data+0x1dc08): Section mismatch in reference from the variable sdp2430_config to the (unknown reference) .init.data:(unknown)
The variable sdp2430_config references
the (unknown reference) __initdata (unknown)
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

WARNING: vmlinux.o(.data+0x1e1d8): Section mismatch in reference from the variable apollon_config to the (unknown reference) .init.data:(unknown)
The variable apollon_config references
the (unknown reference) __initdata (unknown)
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,

Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoomap: boards w/ wl12xx should select REGULATOR_FIXED_VOLTAGE
Ohad Ben-Cohen [Wed, 24 Nov 2010 10:04:50 +0000 (10:04 +0000)]
omap: boards w/ wl12xx should select REGULATOR_FIXED_VOLTAGE

Power to the wl12xx wlan device is controlled by a fixed regulator.

Boards that have the wl12xx should select REGULATOR_FIXED_VOLTAGE so
users will not be baffled.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoOMAP3: add comments for erratas i540 and i478 workarounds
Jean Pihet [Wed, 17 Nov 2010 17:52:11 +0000 (17:52 +0000)]
OMAP3: add comments for erratas i540 and i478 workarounds

Add comments and IDs for the following erratas:
- i540: MPU cannot exit from Standby,
- i478: Unexpected Cold-Reset is generated when device is coming
   back from OFF mode

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoMerge branch 'devel-board' into omap-for-linus
Tony Lindgren [Fri, 17 Dec 2010 23:14:02 +0000 (15:14 -0800)]
Merge branch 'devel-board' into omap-for-linus

13 years agoarm: omap: add minimal support for RM-680
Aaro Koskinen [Fri, 17 Dec 2010 23:13:47 +0000 (15:13 -0800)]
arm: omap: add minimal support for RM-680

Add minimal support for Nokia RM-680 board.

Tested with omap2plus_defconfig.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
[tony@atomide.com: updated to remove omap_gpio_init
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: omap: sdram-nokia: add 97.6/195.2 MHz timing data
Aaro Koskinen [Fri, 17 Dec 2010 23:13:46 +0000 (15:13 -0800)]
arm: omap: sdram-nokia: add 97.6/195.2 MHz timing data

Introduce 97.6/195.2 MHz memory timing data. Based on patches by Eduardo
Valentin, Igor Dmitriev and Juha Keski-Saari.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Eduardo Valentin <eduardo.valentin@nokia.com>
Cc: Igor Dmitriev <ext-dmitriev.igor@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: omap: sdram-nokia: delete redundant timing data
Aaro Koskinen [Fri, 17 Dec 2010 23:13:46 +0000 (15:13 -0800)]
arm: omap: sdram-nokia: delete redundant timing data

41.5 MHz SDRAM clock is not usable.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: omap: sdram-nokia: improve error handling
Aaro Koskinen [Fri, 17 Dec 2010 23:13:46 +0000 (15:13 -0800)]
arm: omap: sdram-nokia: improve error handling

Actually check for errors: print an error log and return NULL.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: omap: sdram-nokia: use array to list timings
Aaro Koskinen [Fri, 17 Dec 2010 23:13:45 +0000 (15:13 -0800)]
arm: omap: sdram-nokia: use array to list timings

Use an array to make it easier to add new values.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: omap: sdram-nokia: prepare for new memory timings
Aaro Koskinen [Fri, 17 Dec 2010 23:13:45 +0000 (15:13 -0800)]
arm: omap: sdram-nokia: prepare for new memory timings

Rename the current timings to indicate they're for 166 MHz. Based on
patches by Eduardo Valentin and Juha Keski-Saari.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Eduardo Valentin <eduardo.valentin@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: omap: add sdram-nokia.h
Aaro Koskinen [Fri, 17 Dec 2010 23:13:44 +0000 (15:13 -0800)]
arm: omap: add sdram-nokia.h

Add a header file for Nokia SDRAM functions. Based on patches by Juha
Keski-Saari.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarm: omap: rename board-rx51-sdram.c to sdram-nokia.c
Aaro Koskinen [Fri, 17 Dec 2010 23:13:44 +0000 (15:13 -0800)]
arm: omap: rename board-rx51-sdram.c to sdram-nokia.c

Rename the file and functions so that it can be reused by future Nokia
boards. Based on patches by Juha Keski-Saari.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
13 years agoarch/tile: handle rt_sigreturn() more cleanly
Chris Metcalf [Tue, 14 Dec 2010 21:07:25 +0000 (16:07 -0500)]
arch/tile: handle rt_sigreturn() more cleanly

The current tile rt_sigreturn() syscall pattern uses the common idiom
of loading up pt_regs with all the saved registers from the time of
the signal, then anticipating the fact that we will clobber the ABI
"return value" register (r0) as we return from the syscall by setting
the rt_sigreturn return value to whatever random value was in the pt_regs
for r0.

However, this breaks in our 64-bit kernel when running "compat" tasks,
since we always sign-extend the "return value" register to properly
handle returned pointers that are in the upper 2GB of the 32-bit compat
address space.  Doing this to the sigreturn path then causes occasional
random corruption of the 64-bit r0 register.

Instead, we stop doing the crazy "load the return-value register"
hack in sigreturn.  We already have some sigreturn-specific assembly
code that we use to pass the pt_regs pointer to C code.  We extend that
code to also set the link register to point to a spot a few instructions
after the usual syscall return address so we don't clobber the saved r0.
Now it no longer matters what the rt_sigreturn syscall returns, and the
pt_regs structure can be cleanly and completely reloaded.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
13 years agoarch/tile: handle CLONE_SETTLS in copy_thread(), not user space
Chris Metcalf [Tue, 14 Dec 2010 20:57:49 +0000 (15:57 -0500)]
arch/tile: handle CLONE_SETTLS in copy_thread(), not user space

Previously we were just setting up the "tp" register in the
new task as started by clone() in libc.  However, this is not
quite right, since in principle a signal might be delivered to
the new task before it had its TLS set up.  (Of course, this race
window still exists for resetting the libc getpid() cached value
in the new task, in principle.  But in any case, we are now doing
this exactly the way all other architectures do it.)

This change is important for 2.6.37 since the tile glibc we will
be submitting upstream will not set TLS in user space any more,
so it will only work on a kernel that has this fix.  It should
also be taken for 2.6.36.x in the stable tree if possible.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: stable <stable@kernel.org>