Rusty Russell [Mon, 24 Nov 2008 16:05:12 +0000 (02:35 +1030)]
sched: convert cpu_isolated_map to cpumask_var_t.
Impact: stack usage reduction, (future) size reduction, cleanup
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space for small nr_cpu_ids but big CONFIG_NR_CPUS. cpumask_var_t
is just a struct cpumask for !CONFIG_CPUMASK_OFFSTACK.
We can also use cpulist_parse() instead of doing it manually in
isolated_cpu_setup.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:12 +0000 (02:35 +1030)]
sched: convert sched_domain_debug to cpumask_var_t.
Impact: stack usage reduction
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
stack space. cpumask_var_t is just a struct cpumask for
!CONFIG_CPUMASK_OFFSTACK.
In this case, we always alloced, but we don't need to any more.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:11 +0000 (02:35 +1030)]
sched: convert struct (sys_)sched_setaffinity() to cpumask_var_t.
Impact: stack usage reduction
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space on the stack. cpumask_var_t is just a struct cpumask for
!CONFIG_CPUMASK_OFFSTACK.
Note the removal of the initializer of new_mask: since the first thing
we did was "cpus_and(new_mask, new_mask, cpus_allowed)" I just changed
that to "cpumask_and(new_mask, in_mask, cpus_allowed);".
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:11 +0000 (02:35 +1030)]
sched: avoid stack var in move_task_off_dead_cpu
Impact: stack usage reduction
With some care, we can avoid needing a temporary cpumask (we can't
really allocate here, since we can't fail).
This version calls cpuset_cpus_allowed_locked() with the task_rq_lock
held. I'm fairly sure this works, but there might be a deadlock
hiding.
And of course, we can't get rid of the last cpumask on stack until we
can use cpumask_of_node instead of node_to_cpumask.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:11 +0000 (02:35 +1030)]
sched: convert sys_sched_getaffinity() to cpumask_var_t.
Impact: stack usage reduction
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space in the stack. cpumask_var_t is just a struct cpumask for
!CONFIG_CPUMASK_OFFSTACK.
Some jiggling here to make sure we always exit at the bottom (so we hit
the free_cpumask_var there).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:11 +0000 (02:35 +1030)]
sched: convert rebalance_domains() to cpumask_var_t.
Impact: stack usage reduction
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space in the stack. cpumask_var_t is just a struct cpumask for
!CONFIG_CPUMASK_OFFSTACK.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:10 +0000 (02:35 +1030)]
sched: convert idle_balance() to cpumask_var_t.
Impact: stack usage reduction
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space in the stack. cpumask_var_t is just a struct cpumask for
!CONFIG_CPUMASK_OFFSTACK.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:09 +0000 (02:35 +1030)]
sched: convert nohz struct to cpumask_var_t.
Impact: (future) size reduction for large NR_CPUS.
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space for small nr_cpu_ids but big CONFIG_NR_CPUS. cpumask_var_t
is just a struct cpumask for !CONFIG_CPUMASK_OFFSTACK.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:05 +0000 (02:35 +1030)]
sched: convert struct root_domain to cpumask_var_t.
Impact: (future) size reduction for large NR_CPUS.
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space for small nr_cpu_ids but big CONFIG_NR_CPUS. cpumask_var_t
is just a struct cpumask for !CONFIG_CPUMASK_OFFSTACK.
def_root_domain is static, and so its masks are initialized with
alloc_bootmem_cpumask_var. After that, alloc_cpumask_var is used.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:04 +0000 (02:35 +1030)]
sched: convert nohz_cpu_mask to cpumask_var_t.
Impact: (future) size reduction for large NR_CPUS.
Dynamically allocating cpumasks (when CONFIG_CPUMASK_OFFSTACK) saves
space for small nr_cpu_ids but big CONFIG_NR_CPUS. cpumask_var_t
is just a struct cpumask for !CONFIG_CPUMASK_OFFSTACK.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:04 +0000 (02:35 +1030)]
sched: convert struct sched_group/sched_domain cpumask_ts to variable bitmaps
Impact: (future) size reduction for large NR_CPUS.
We move the 'cpumask' member of sched_group to the end, so when we
kmalloc it we can do a minimal allocation: saves space for small
nr_cpu_ids but big CONFIG_NR_CPUS. Similar trick for 'span' in
sched_domain.
This isn't quite as good as converting to a cpumask_var_t, as some
sched_groups are actually static, but it's safer: we don't have to
figure out where to call alloc_cpumask_var/free_cpumask_var.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:04 +0000 (02:35 +1030)]
sched: wrap sched_group and sched_domain cpumask accesses.
Impact: trivial wrap of member accesses
This eases the transition in the next patch.
We also get rid of a temporary cpumask in find_idlest_cpu() thanks to
for_each_cpu_and, and sched_balance_self() due to getting weight before
setting sd to NULL.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:03 +0000 (02:35 +1030)]
sched: remove any_online_cpu()
Impact: use new API
any_online_cpu() is a good name, but it takes a cpumask_t, not a
pointer.
There are several places where any_online_cpu() doesn't really want a
mask arg at all. Replace all callers with cpumask_any() and
cpumask_any_and().
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:03 +0000 (02:35 +1030)]
sched: get rid of boutique sched.c allocations, use cpumask_var_t.
Impact: use new general API
Using lots of allocs rather than one big alloc is less efficient, but
who cares for this setup function?
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Mon, 24 Nov 2008 16:05:02 +0000 (02:35 +1030)]
sched: convert sched.c from for_each_cpu_mask to for_each_cpu.
Impact: trivial API conversion
This is a simple conversion, but note that for_each_cpu() terminates
with i >= nr_cpu_ids, not i == NR_CPUS like for_each_cpu_mask() did.
I don't convert all of them: sd->span changes in a later patch, so
change those iterators there rather than here.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Mike Travis [Mon, 24 Nov 2008 16:05:02 +0000 (02:35 +1030)]
sched: reduce stack size requirements in kernel/sched.c
Impact: cleanup
* use node_to_cpumask_ptr in place of node_to_cpumask to reduce stack
requirements in sched.c
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Mon, 24 Nov 2008 16:46:57 +0000 (17:46 +0100)]
Merge branches 'sched/core', 'core/core' and 'tracing/core' into cpus4096
Ingo Molnar [Mon, 24 Nov 2008 16:46:24 +0000 (17:46 +0100)]
Merge branches 'tracing/branch-tracer', 'tracing/fastboot', 'tracing/ftrace', 'tracing/function-return-tracer', 'tracing/power-tracer', 'tracing/powerpc', 'tracing/ring-buffer', 'tracing/stack-tracer' and 'tracing/urgent' into tracing/core
Ingo Molnar [Mon, 24 Nov 2008 16:44:55 +0000 (17:44 +0100)]
Merge branches 'core/debug', 'core/futexes', 'core/locking', 'core/rcu', 'core/signal', 'core/urgent' and 'core/xen' into core/core
Ingo Molnar [Mon, 24 Nov 2008 16:37:12 +0000 (17:37 +0100)]
Merge branch 'sched/rt' into sched/core
Török Edwin [Mon, 24 Nov 2008 08:17:42 +0000 (10:17 +0200)]
mutex: __used is needed for function referenced only from inline asm
Impact: fix build failure on llvm-gcc-4.2
According to the gcc manual, the 'used' attribute should be applied to
functions referenced only from inline assembly.
This fixes a build failure with llvm-gcc-4.2, which deleted
__mutex_lock_slowpath, __mutex_unlock_slowpath.
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Török Edwin [Sun, 23 Nov 2008 21:24:53 +0000 (23:24 +0200)]
vfs, seqfile: fix comment style on mangle_path
Impact: use standard docbook tags
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Frederic Weisbecker [Sun, 23 Nov 2008 17:43:39 +0000 (18:43 +0100)]
tracing/function-return-tracer: free the return stack on free_task()
Impact: avoid losing some traces when a task is freed
do_exit() is not the last function called when a task finishes.
There are still some functions which are to be called such as
ree_task(). So we delay the freeing of the return stack to the
last moment.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Pekka Paalanen [Sun, 23 Nov 2008 19:24:59 +0000 (21:24 +0200)]
tracing, doc: update mmiotrace documentation
Impact: update documentation
Update to reflect the current state of the tracing framework:
- "none" tracer has been replaced by "nop" tracer
- tracing_enabled must be toggled when changing buffer size
Signed-off-by: Pekka Paalanen <pq@iki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Pekka Paalanen [Sun, 23 Nov 2008 19:24:30 +0000 (21:24 +0200)]
x86, mmiotrace: fix buffer overrun detection
Impact: fix mmiotrace overrun tracing
When ftrace framework moved to use the ring buffer facility, the buffer
overrun detection was broken after 2.6.27 by commit
| commit
3928a8a2d98081d1bc3c0a84a2d70e29b90ecf1c
| Author: Steven Rostedt <rostedt@goodmis.org>
| Date: Mon Sep 29 23:02:41 2008 -0400
|
| ftrace: make work with new ring buffer
|
| This patch ports ftrace over to the new ring buffer.
The detection is now fixed by using the ring buffer API.
When mmiotrace detects a buffer overrun, it will report the number of
lost events. People reading an mmiotrace log must know if something was
missed, otherwise the data may not make sense.
Signed-off-by: Pekka Paalanen <pq@iki.fi>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Frederic Weisbecker [Sun, 23 Nov 2008 16:33:12 +0000 (17:33 +0100)]
tracing/function-return-tracer: don't trace kfree while it frees the return stack
Impact: fix a crash
While I killed the cat process, I got sometimes the following (but rare)
crash:
[ 65.689027] Pid: 2969, comm: cat Not tainted (2.6.28-rc6-tip #83) AMILO Li 2727
[ 65.689027] EIP: 0060:[<
00000000>] EFLAGS:
00010082 CPU: 1
[ 65.689027] EIP is at 0x0
[ 65.689027] EAX:
00000000 EBX:
f66cd780 ECX:
c019a64a EDX:
f66cd780
[ 65.689027] ESI:
00000286 EDI:
f66cd780 EBP:
f630be2c ESP:
f630be24
[ 65.689027] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 65.689027] Process cat (pid: 2969, ti=
f630a000 task=
f66cd780 task.ti=
f630a000)
[ 65.689027] Stack:
[ 65.689027]
00000012 f630bd54 f630be7c c012c853 00000000 c0133cc9 f66cda54 f630be5c
[ 65.689027]
f630be68 f66cda54 f66cd88c f66cd878 f7070000 00000001 f630be90 c0135dbc
[ 65.689027]
f614a614 f630be68 f630be68 f65ba200 00000002 f630bf10 f630be90 c012cad6
[ 65.689027] Call Trace:
[ 65.689027] [<
c012c853>] ? do_exit+0x603/0x850
[ 65.689027] [<
c0133cc9>] ? next_signal+0x9/0x40
[ 65.689027] [<
c0135dbc>] ? dequeue_signal+0x8c/0x180
[ 65.689027] [<
c012cad6>] ? do_group_exit+0x36/0x90
[ 65.689027] [<
c013709c>] ? get_signal_to_deliver+0x20c/0x390
[ 65.689027] [<
c0102b69>] ? do_notify_resume+0x99/0x8b0
[ 65.689027] [<
c02e6d1a>] ? tty_ldisc_deref+0x5a/0x80
[ 65.689027] [<
c014db9b>] ? trace_hardirqs_on+0xb/0x10
[ 65.689027] [<
c02e6d1a>] ? tty_ldisc_deref+0x5a/0x80
[ 65.689027] [<
c02e39b0>] ? n_tty_write+0x0/0x340
[ 65.689027] [<
c02e1812>] ? redirected_tty_write+0x82/0x90
[ 65.689027] [<
c019ee99>] ? vfs_write+0x99/0xd0
[ 65.689027] [<
c02e1790>] ? redirected_tty_write+0x0/0x90
[ 65.689027] [<
c019f342>] ? sys_write+0x42/0x70
[ 65.689027] [<
c01035ca>] ? work_notifysig+0x13/0x19
[ 65.689027] Code: Bad EIP value.
[ 65.689027] EIP: [<
00000000>] 0x0 SS:ESP 0068:
f630be24
This is because on do_exit(), kfree is called to free the return addresses stack
but kfree is traced and stored its return address in this stack.
This patch fixes it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Sun, 23 Nov 2008 12:47:54 +0000 (13:47 +0100)]
Merge branch 'ppc/ftrace' of git://git./linux/kernel/git/rostedt/linux-2.6-trace into tracing/powerpc
Török Edwin [Sun, 23 Nov 2008 11:08:10 +0000 (13:08 +0200)]
tracing/stack-tracer: avoid races accessing file
Impact: fix race
vma->vm_file reference is only stable while holding the mmap_sem,
so move usage of it to within the critical section.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Török Edwin [Sun, 23 Nov 2008 10:39:08 +0000 (12:39 +0200)]
tracing/stack-tracer: introduce CONFIG_USER_STACKTRACE_SUPPORT
Impact: cleanup
User stack tracing is just implemented for x86, but it is not x86 specific.
Introduce a generic config flag, that is currently enabled only for x86.
When other arches implement it, they will have to
SELECT USER_STACKTRACE_SUPPORT.
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Török Edwin [Sun, 23 Nov 2008 10:39:07 +0000 (12:39 +0200)]
tracing/stack-tracer: fix locking and refcounts
Impact: fix refcounting/object-access bug
Hold mmap_sem while looking up/accessing vma.
Hold the RCU lock while using the task we looked up.
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Török Edwin [Sun, 23 Nov 2008 10:39:06 +0000 (12:39 +0200)]
tracing/stack-tracer: fix style issues
Impact: cleanup
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Fri, 21 Nov 2008 19:44:57 +0000 (14:44 -0500)]
trace: fix compiler warning in branch profiler
Impact: fix compiler warning
The ftrace_pointers used in the branch profiler are constant values.
They should never change. But the compiler complains when they are
passed into the debugfs_create_file as a data pointer, because the
function discards the qualifier.
This patch typecasts the parameter to debugfs_create_file back to
a void pointer. To remind the callbacks that they are pointing to
a constant value, I also modified the callback local pointers to
be const struct ftrace_pointer * as well.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Fri, 21 Nov 2008 17:59:38 +0000 (12:59 -0500)]
ftrace: add ftrace_off_permanent
Impact: add new API to disable all of ftrace on anomalies
It case of a serious anomaly being detected (like something caught by
lockdep) it is a good idea to disable all tracing immediately, without
grabing any locks.
This patch adds ftrace_off_permanent that disables the tracers, function
tracing and ring buffers without a way to enable them again. This should
only be used when something serious has been detected.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Fri, 21 Nov 2008 17:41:55 +0000 (12:41 -0500)]
ring-buffer: add tracing_off_permanent
Impact: feature to permanently disable ring buffer
This patch adds a API to the ring buffer code that will permanently
disable the ring buffer from ever recording. This should only be
called when some serious anomaly is detected, and the system
may be in an unstable state. When that happens, shutting down the
recording to the ring buffers may be appropriate.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Jim Radford [Fri, 21 Nov 2008 03:48:39 +0000 (19:48 -0800)]
ftrace: scripts/recordmcount.pl support for ARM
Impact: extend scripts/recordmcount.pl to ARM
Arm uses %progbits instead of @progbits and requires only 4 byte alignment.
[ Thanks to Sam Ravnborg for mentioning that ARM uses %progbits ]
Signed-off-by: Jim Radford <radford@galvanix.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Matt Fleming [Thu, 20 Nov 2008 21:49:52 +0000 (21:49 +0000)]
ftrace: specify $alignment for sh architecture
Impact: extend scripts/recordmcount.pl with default alignment for SH
Set $alignment=2 for the sh architecture so that a ".align 2" directive
will be emitted for all __mcount_loc sections. Fix a whitspace error
while I'm here (converted spaces to tabs).
Signed-off-by: Matt Fleming <mjf@gentoo.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Fri, 21 Nov 2008 06:30:54 +0000 (01:30 -0500)]
trace: profile all if conditionals
Impact: feature to profile if statements
This patch adds a branch profiler for all if () statements.
The results will be found in:
/debugfs/tracing/profile_branch
For example:
miss hit % Function File Line
------- --------- - -------- ---- ----
0 1 100 x86_64_start_reservations head64.c 127
0 1 100 copy_bootdata head64.c 69
1 0 0 x86_64_start_kernel head64.c 111
32 0 0 set_intr_gate desc.h 319
1 0 0 reserve_ebda_region head.c 51
1 0 0 reserve_ebda_region head.c 47
0 1 100 reserve_ebda_region head.c 42
0 0 X maxcpus main.c 165
Miss means the branch was not taken. Hit means the branch was taken.
The percent is the percentage the branch was taken.
This adds a significant amount of overhead and should only be used
by those analyzing their system.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Fri, 21 Nov 2008 06:51:53 +0000 (01:51 -0500)]
trace: branch profiling should not print percent without data
Impact: cleanup on output of branch profiler
When a branch has not been taken, it does not make sense to show
a percentage incorrect or hit. This patch changes the behaviour
to print out a 'X' when the branch has not been executed yet.
For example:
correct incorrect % Function File Line
------- --------- - -------- ---- ----
2096 0 0 do_arch_prctl process_64.c 832
0 0 X do_arch_prctl process_64.c 804
2604 0 0 IS_ERR err.h 34
130228 5765 4 __switch_to process_64.c 673
0 0 X enable_TSC process_64.c 448
0 0 X disable_TSC process_64.c 431
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Fri, 21 Nov 2008 05:40:40 +0000 (00:40 -0500)]
trace: consolidate unlikely and likely profiler
Impact: clean up to make one profiler of like and unlikely tracer
The likely and unlikely profiler prints out the file and line numbers
of the annotated branches that it is profiling. It shows the number
of times it was correct or incorrect in its guess. Having two
different files or sections for that matter to tell us if it was a
likely or unlikely is pretty pointless. We really only care if
it was correct or not.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Fri, 21 Nov 2008 04:57:47 +0000 (23:57 -0500)]
trace: remove extra assign in branch check
Impact: clean up of branch check
The unlikely/likely profiler does an extra assign of the f.line.
This is not needed since it is already calculated at compile time.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Thu, 20 Nov 2008 20:07:34 +0000 (15:07 -0500)]
ftrace: create default variables for archs in recordmcount.pl
Impact: cleanup of recordmcount.pl
Now that more architectures are being ported to the MCOUNT_RECORD
method, there is no reason to have each declare their own arch
specific variable if most of them share the same value. This patch
creates a set of default values for the arch specific variables
based off of i386.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Thu, 20 Nov 2008 15:16:16 +0000 (07:16 -0800)]
ftrace: add support for powerpc to recordmcount.pl script
Impact: Add PowerPC port to recordmcount.pl script
This patch updates the recordmcount.pl script to process
PowerPC.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Matt Fleming [Wed, 12 Nov 2008 11:11:47 +0000 (20:11 +0900)]
sh: dynamic ftrace support.
First cut at dynamic ftrace support.
[
Steven Rostedt - only updated the recordmcount.pl file.
There are updates for PowerPC that will conflict with this,
and we need to base off of these changes.
]
Signed-off-by: Matt Fleming <mjf@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Will Newton [Fri, 21 Nov 2008 22:08:59 +0000 (14:08 -0800)]
init/main.c: use ktime accessor function in initcall_debug code
Impact: fix initcall debug output on non-scalar ktime platforms (32-bit embedded)
The initcall_debug code access the tv64 member of ktime. This won't work
correctly for large deltas on platforms that don't use the scalar ktime
implementation.
Signed-off-by: Will Newton <will.newton@gmail.com>
Acked-by: Tim Bird <tim.bird@am.sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Sun, 23 Nov 2008 09:37:12 +0000 (10:37 +0100)]
tracing: allow tracing of suspend/resume & hibernation code again
Impact: widen function-tracing to suspend+resume (and hibernation) sequences
Now that the ftrace kernel thread is gone, we can allow tracing
during suspend/resume again.
So revert these two commits:
f42ac38c5 "ftrace: disable tracing for suspend to ram"
41108eb10 "ftrace: disable tracing for hibernation"
This should be tested very carefully, as it could interact with
altneratives instruction patching, etc.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Török Edwin [Sat, 22 Nov 2008 11:28:48 +0000 (13:28 +0200)]
tracing: identify which executable object the userspace address belongs to
Impact: modify+improve the userstacktrace tracing visualization feature
Store thread group leader id, and use it to lookup the address in the
process's map. We could have looked up the address on thread's map,
but the thread might not exist by the time we are called. The process
might not exist either, but if you are reading trace_pipe, that is
unlikely.
Example usage:
mount -t debugfs nodev /sys/kernel/debug
cd /sys/kernel/debug/tracing
echo userstacktrace >iter_ctrl
echo sym-userobj >iter_ctrl
echo sched_switch >current_tracer
echo 1 >tracing_enabled
cat trace_pipe >/tmp/trace&
.... run application ...
echo 0 >tracing_enabled
cat /tmp/trace
You'll see stack entries like:
/lib/libpthread-2.7.so[+0xd370]
You can convert them to function/line using:
addr2line -fie /lib/libpthread-2.7.so 0xd370
Or:
addr2line -fie /usr/lib/debug/libpthread-2.7.so 0xd370
For non-PIC/PIE executables this won't work:
a.out[+0x73b]
You need to run the following: addr2line -fie a.out 0x40073b
(where 0x400000 is the default load address of a.out)
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Török Edwin [Sat, 22 Nov 2008 11:28:48 +0000 (13:28 +0200)]
vfs, seqfile: make mangle_path() global
Impact: expose new VFS API
make mangle_path() available, as per the suggestions of Christoph Hellwig
and Al Viro:
http://lkml.org/lkml/2008/11/4/338
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Török Edwin [Sat, 22 Nov 2008 11:28:47 +0000 (13:28 +0200)]
tracing: add support for userspace stacktraces in tracing/iter_ctrl
Impact: add new (default-off) tracing visualization feature
Usage example:
mount -t debugfs nodev /sys/kernel/debug
cd /sys/kernel/debug/tracing
echo userstacktrace >iter_ctrl
echo sched_switch >current_tracer
echo 1 >tracing_enabled
.... run application ...
echo 0 >tracing_enabled
Then read one of 'trace','latency_trace','trace_pipe'.
To get the best output you can compile your userspace programs with
frame pointers (at least glibc + the app you are tracing).
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Sun, 23 Nov 2008 08:18:56 +0000 (09:18 +0100)]
tracing/function-return-tracer: clean up task start/exit callbacks
Impact: cleanup
Eliminate #ifdefs in core code by using empty inline functions.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Frederic Weisbecker [Sun, 23 Nov 2008 05:22:56 +0000 (06:22 +0100)]
tracing/function-return-tracer: store return stack into task_struct and allocate it dynamically
Impact: use deeper function tracing depth safely
Some tests showed that function return tracing needed a more deeper depth
of function calls. But it could be unsafe to store these return addresses
to the stack.
So these arrays will now be allocated dynamically into task_struct of current
only when the tracer is activated.
Typical scheme when tracer is activated:
- allocate a return stack for each task in global list.
- fork: allocate the return stack for the newly created task
- exit: free return stack of current
- idle init: same as fork
I chose a default depth of 50. I don't have overruns anymore.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Sun, 23 Nov 2008 08:10:32 +0000 (09:10 +0100)]
Merge branches 'tracing/profiling', 'tracing/options' and 'tracing/urgent' into tracing/core
Li Zefan [Fri, 21 Nov 2008 07:57:32 +0000 (15:57 +0800)]
lockdep: consistent alignement for lockdep info
Impact: prettify /proc/lockdep_info
Just feel odd that not all lines of lockdep info are aligned.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Vegard Nossum [Fri, 21 Nov 2008 00:30:36 +0000 (01:30 +0100)]
sched: update comment for move_task_off_dead_cpu
Impact: cleanup
This commit:
commit
f7b4cddcc5aca03e80e357360c9424dfba5056c2
Author: Oleg Nesterov <oleg@tv-sign.ru>
Date: Tue Oct 16 23:30:56 2007 -0700
do CPU_DEAD migrating under read_lock(tasklist) instead of write_lock_irq(ta
Currently move_task_off_dead_cpu() is called under
write_lock_irq(tasklist). This means it can't use task_lock() which is
needed to improve migrating to take task's ->cpuset into account.
Change the code to call move_task_off_dead_cpu() with irqs enabled, and
change migrate_live_tasks() to use read_lock(tasklist).
...forgot to update the comment in front of move_task_off_dead_cpu.
Reference: http://lkml.org/lkml/2008/6/23/135
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Fri, 21 Nov 2008 07:57:04 +0000 (08:57 +0100)]
Merge commit 'v2.6.28-rc6' into sched/core
Liming Wang [Fri, 21 Nov 2008 03:00:18 +0000 (11:00 +0800)]
function tracing: fix wrong position computing of stack_trace
Impact: make output of stack_trace complete if buffer overruns
When read buffer overruns, the output of stack_trace isn't complete.
When printing records with seq_printf in t_show, if the read buffer
has overruned by the current record, then this record won't be
printed to user space through read buffer, it will just be dropped in
this printing.
When next printing, t_start should return the "*pos"th record, which
is the one dropped by previous printing, but it just returns
(m->private + *pos)th record.
Here we use a more sane method to implement seq_operations which can
be found in kernel code. Thus we needn't initialize m->private.
About testing, it's not easy to overrun read buffer, but we can use
seq_printf to print more padding bytes in t_show, then it's easy to
check whether or not records are lost.
This commit has been tested on both condition of overrun and non
overrun.
Signed-off-by: Liming Wang <liming.wang@windriver.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Linus Torvalds [Fri, 21 Nov 2008 02:08:09 +0000 (18:08 -0800)]
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 5330/1: mach-pxa: Fixup reset for systems using reboot=cold or other strings
[ARM] pxa: fix incorrect PCMCIA PSKTSEL pin configuration for spitz
[ARM] pxa: fix I2C controller device being registered twice on Akita
pxafb: only initialize the smart panel thread when dealing with a smartpanel
pxafb: introduce LCD_TYPE_MASK and use it.
Linus Torvalds [Thu, 20 Nov 2008 23:19:22 +0000 (15:19 -0800)]
Linux 2.6.28-rc6
Linus Torvalds [Thu, 20 Nov 2008 23:07:40 +0000 (15:07 -0800)]
Merge branch 'release' of git://git./linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] xen: fix xen_get_eflags.
[IA64] ia64/pv_ops/pv_cpu_ops: fix _IA64_REG_IP case.
[IA64] remove duplicate include iommu.h
[IA64] use mprintk instead of printk, in ia64_mca_modify_original_stack
[IA64] Rationalize kernel mode alignment checking
Linus Torvalds [Thu, 20 Nov 2008 21:53:21 +0000 (13:53 -0800)]
Merge git://git./linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
USB: ACE1001 patch for cp2101.c
USB: usbmon: fix read(2)
USB: gadget rndis: send notifications
USB: gadget rndis: stop windows self-immolation
USB: storage: update unusual_devs entries for Nokia 5300 and 5310
USB: storage: updates unusual_devs entry for the Nokia 6300
usb: musb: fix bug in musb_schedule
USB: fix SB700 usb subsystem hang bug
Isaku Yamahata [Tue, 18 Nov 2008 10:20:51 +0000 (19:20 +0900)]
[IA64] xen: fix xen_get_eflags.
fix xen_get_eflags. It doesn't take any argument.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Isaku Yamahata [Tue, 18 Nov 2008 10:19:50 +0000 (19:19 +0900)]
[IA64] ia64/pv_ops/pv_cpu_ops: fix _IA64_REG_IP case.
pv_cpu_ops.getreg(_IA64_REG_IP) returned constant.
But the returned ip valued should be the one in the caller, not of the callee.
This patch fixes that.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Huang Weiyi [Thu, 20 Nov 2008 21:38:16 +0000 (13:38 -0800)]
[IA64] remove duplicate include iommu.h
arch/ia64/kernel/pci-dma.c only needs to include iommu once.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Hidetoshi Seto [Mon, 17 Nov 2008 01:18:08 +0000 (10:18 +0900)]
[IA64] use mprintk instead of printk, in ia64_mca_modify_original_stack
Using printk from MCA/INIT context is unsafe since it can cause deadlock.
The ia64_mca_modify_original_stack is called from both of mca handler and
init handler, so it should use mprintk instead of printk.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Tony Luck [Thu, 20 Nov 2008 21:27:12 +0000 (13:27 -0800)]
[IA64] Rationalize kernel mode alignment checking
Itanium processors can handle some misaligned data accesses. They
also provide a mode where all such accesses are forced to trap. The
kernel was schizophrenic about use of this mode:
* Base kernel code ran in permissive mode where the only traps
generated were from those cases that the h/w could not handle.
* Interrupt, syscall and trap code ran in strict mode where all
unaligned accesses caused traps to the 0x5a00 unaligned reference
vector.
Use strict alignment checking throughout the kernel, but make
sure that we continue to let user mode use more relaxed mode
as the default.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Matthew Wilcox [Thu, 20 Nov 2008 21:09:33 +0000 (14:09 -0700)]
x86: Fix interrupt leak due to migration
When we migrate an interrupt from one CPU to another, we set the
move_in_progress flag and clean up the vectors later once they're not
being used. If you're unlucky and call destroy_irq() before the vectors
become un-used, the move_in_progress flag is never cleared, which causes
the interrupt to become unusable.
This was discovered by Jesse Brandeburg for whom it manifested as an
MSI-X device refusing to use MSI-X mode when the driver was unloaded
and reloaded repeatedly.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Trond Myklebust [Thu, 20 Nov 2008 21:06:21 +0000 (16:06 -0500)]
SUNRPC: Fix a performance regression in the RPC authentication code
Fix a regression reported by Max Kellermann whereby kernel profiling
showed that his clients were spending 45% of their time in
rpcauth_lookup_credcache.
It turns out that although his processes had identical uid/gid/groups,
generic_match() was failing to detect this, because the task->group_info
pointers were not shared. This again lead to the creation of a huge number
of identical credentials at the RPC layer.
The regression is fixed by comparing the contents of task->group_info
if the actual pointers are not identical.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 20 Nov 2008 21:14:16 +0000 (13:14 -0800)]
Merge git://git./linux/kernel/git/sfrench/cifs-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
[CIFS] Do not attempt to close invalidated file handles
[CIFS] fix check for dead tcon in smb_init
Linus Torvalds [Thu, 20 Nov 2008 21:13:48 +0000 (13:13 -0800)]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
MIPS: csrc-r4k: Fix declaration depending on the wrong CONFIG_ symbol.
MIPS: csrc-r4k: Fix spelling mistake.
MIPS: RB532: Provide functions for gpio configuration
MIPS: IP22: Make indy_sc_ops variable static
MIPS: RB532: GPIO register offsets are relative to GPIOBASE
MIPS: Malta: Fix include paths in malta-amon.c
Linus Torvalds [Thu, 20 Nov 2008 21:13:03 +0000 (13:13 -0800)]
Merge branch 'core-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
intel-iommu: fix compile warnings
Linus Torvalds [Thu, 20 Nov 2008 21:12:14 +0000 (13:12 -0800)]
Merge git://git./linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (23 commits)
net: fix tiny output corruption of /proc/net/snmp6
atl2: don't request irq on resume if netif running
ipv6: use seq_release_private for ip6mr.c /proc entries
pkt_sched: fix missing check for packet overrun in qdisc_dump_stab()
smc911x: Fix printf format typo in smc911x driver.
asix: Fix asix-based cards connecting to 10/100Mbs LAN.
mv643xx_eth: fix recycle check bound
mv643xx_eth: fix the order of mdiobus_{unregister, free}() calls
sh: sh_eth: Update to change of mii_bus
TPROXY: supply a struct flowi->flags argument in inet_sk_rebuild_header()
TPROXY: fill struct flowi->flags in udp_sendmsg()
net: ipg.c fix bracing on endian swapping
phylib: Fix auto-negotiation restart avoidance
net: jme.c rxdesc.flags is __le16, other missing endian swaps
phylib: fix phy name example in documentation
net: Do not fire linkwatch events until the device is registered.
phonet: fix compilation with gcc-3.4
ixgbe: fix compilation with gcc-3.4
pktgen: fix multiple queue warning
net: fix ip_mr_init() error path
...
Linus Torvalds [Thu, 20 Nov 2008 21:11:21 +0000 (13:11 -0800)]
Merge branch 'tracing-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
ftrace: fix dyn ftrace filter selection
ftrace: make filtered functions effective on setting
ftrace: fix set_ftrace_filter
trace: introduce missing mutex_unlock()
tracing: kernel/trace/trace.c: introduce missing kfree()
Linus Torvalds [Thu, 20 Nov 2008 21:09:32 +0000 (13:09 -0800)]
Merge branch 'x86-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: uaccess_64: fix return value in __copy_from_user()
x86: quirk for reboot stalls on a Dell Optiplex 330
Helge Deller [Thu, 20 Nov 2008 09:54:09 +0000 (10:54 +0100)]
parisc: fix bug in compat_arch_ptrace
Commit
81e192d6ce303b6792aa38ff35f41a1a7357f23a ("parisc: convert to
generic compat_sys_ptrace") introduced a bug which segfaults the parisc
64bit kernel when stracing 32bit applications:
Kernel Fault: Code=15 regs=
00000000bafa42b0 (Addr=
00000001baf5ab57)
YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
PSW:
00001000000001101111111100001011 Tainted: G W
r00-03
000000ff0806ff0b 000000004068edc0 00000000401203f8 00000000fb3e2508
r04-07
0000000040686dc0 00000000baf5a800 fffffffffffffffc fffffffffb3e2508
r08-11
00000000baf5a800 000000000004b068 00000000000402b0 0000000000040d68
r12-15
0000000000042a9c 0000000000040a9c 0000000000040d60 0000000000042e9c
r16-19
000000000004b060 000000000004b058 0000000000042d9c ffffffffffffffff
r20-23
000000000800000b 0000000000000000 000000000800000b fffffffffb3e2508
r24-27
00000000fffffffc 0000000000000003 00000000fffffffc 0000000040686dc0
r28-31
00000001baf5a7ff 00000000bafa4280 00000000bafa42b0 00000000000001d7
sr00-03
0000000000fca000 0000000000000000 0000000000000000 0000000000fca000
sr04-07
0000000000000000 0000000000000000 0000000000000000 0000000000000000
IASQ:
0000000000000000 0000000000000000 IAOQ:
0000000040120400 0000000040120404
IIR:
4b9a06b0 ISR:
0000000000000000 IOR:
00000001baf5ab57
CPU: 0 CR30:
00000000bafa4000 CR31:
00000000d22344e0
ORIG_R28:
00000000fb3e2248
IAOQ[0]: compat_arch_ptrace+0xb8/0x160
IAOQ[1]: compat_arch_ptrace+0xbc/0x160
RP(r2): compat_arch_ptrace+0xb0/0x160
Backtrace:
[<
00000000401612ac>] compat_sys_ptrace+0x15c/0x180
[<
0000000040104ef8>] syscall_exit+0x0/0x14
The problem is that compat_arch_ptrace() enters with an addr value of
type compat_ulong_t and calls translate_usr_offset() to translate the
address offset into a struct pt_regs offset like this:
addr = translate_usr_offset(addr)
this means that any return value of translate_usr_offset() is stored
back as compat_ulong_t type into the addr variable.
But since translate_usr_offset() returns -1 for invalid offsets, addr
can now get the value 0xffffffff which then fails the next return-value
sanity check and thus the kernel tries to access invalid memory:
if (addr < 0)
break;
Fix this bug by modifying translate_usr_offset() to take and return
values of type compat_ulong_t, and by returning the value
"sizeof(struct pt_regs)" as an error indicator.
Additionally change the sanity check to check for return values
for >= sizeof(struct pt_regs).
This patch survived my compile and run-tests.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Steve French [Thu, 20 Nov 2008 20:00:44 +0000 (20:00 +0000)]
[CIFS] Do not attempt to close invalidated file handles
If a connection with open file handles has gone down
and come back up and reconnected without reopening
the file handle yet, do not attempt to send an SMB close
request for this handle in cifs_close. We were
checking for the connection being invalid in cifs_close
but since the connection may have been reconnected
we also need to check whether the file handle
was marked invalid (otherwise we could close the
wrong file handle by accident).
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Ralf Baechle [Mon, 3 Nov 2008 11:32:34 +0000 (11:32 +0000)]
MIPS: csrc-r4k: Fix declaration depending on the wrong CONFIG_ symbol.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Ralf Baechle [Mon, 3 Nov 2008 11:31:54 +0000 (11:31 +0000)]
MIPS: csrc-r4k: Fix spelling mistake.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Phil Sutter [Sat, 1 Nov 2008 14:13:21 +0000 (15:13 +0100)]
MIPS: RB532: Provide functions for gpio configuration
As gpiolib doesn't support pin multiplexing, it provides no way to
access the GPIOFUNC register. Also there is no support for setting
interrupt status and level. These functions provide access to them and
are needed by the CompactFlash driver.
Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Dmitri Vorobiev [Fri, 31 Oct 2008 17:54:11 +0000 (19:54 +0200)]
MIPS: IP22: Make indy_sc_ops variable static
The indy_sc_ops variable in arch/mips/mm/sc-ip22.c is needlessly defined
global, and this patch makes it static.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.fi>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
Florian Fainelli [Fri, 31 Oct 2008 13:24:29 +0000 (14:24 +0100)]
MIPS: RB532: GPIO register offsets are relative to GPIOBASE
This patch fixes the wrong use of GPIO register offsets
in devices.c. To avoid further problems, use gpio_get_value
to return the NAND status instead of our own expanded code.
Also define the zero offset of the alternate function register to allow
consistent access.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
David Daney [Sat, 20 Sep 2008 17:16:36 +0000 (10:16 -0700)]
MIPS: Malta: Fix include paths in malta-amon.c
On linux-queue, malta doesn't build after the include file relocation.
This should fix it.
There some occurrences of 'asm-mips' in the comments of quite a few
files, but this is the only place I found it in any code.
Signed-off-by: David Daney <ddaney@avtrex.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Steven Rostedt [Sat, 15 Nov 2008 07:39:05 +0000 (02:39 -0500)]
powerpc/ppc32: ftrace, dynamic ftrace to handle modules
Impact: add ability to trace modules on 32 bit PowerPC
This patch performs the necessary trampoline calls to handle
modules with dynamic ftrace on 32 bit PowerPC.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Sat, 15 Nov 2008 04:47:03 +0000 (20:47 -0800)]
powerpc/ppc64: ftrace, handle module trampolines for dyn ftrace
Impact: Allow 64 bit PowerPC to trace modules with dynamic ftrace
This adds code to handle the PPC64 module trampolines, and allows for
PPC64 to use dynamic ftrace.
Thanks to Paul Mackerras for these updates:
- fix the mod and rec->arch.mod NULL checks.
- fix to is_bl_op compare.
Thanks to Milton Miller for:
- finding the nasty race with using two nops, and recommending
instead that I use a branch 8 forward.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Sat, 15 Nov 2008 00:21:20 +0000 (16:21 -0800)]
powerpc: ftrace, use probe_kernel API to modify code
Impact: use cleaner probe_kernel API over assembly
Using probe_kernel_read/write interface is a much cleaner approach
than the current assembly version.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Sat, 15 Nov 2008 00:21:19 +0000 (16:21 -0800)]
powerpc: ftrace, convert to new dynamic ftrace arch API
Impact: update to PowerPC ftrace arch API
This patch converts PowerPC to use the new dynamic ftrace arch API.
Thanks to Paul Mackennas for pointing out the mistakes of my original
test_24bit_addr function.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Sat, 15 Nov 2008 00:21:19 +0000 (16:21 -0800)]
powerpc: ftrace, do not latency trace idle
Impact: fix for irq off latency tracer
When idle is called, interrupts are disabled, but the idle function
will still wake up on an interrupt. The problem is that the interrupt
disabled latency tracer will take this call to idle as a latency.
This patch disables the latency tracing when going into idle.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Alexey Dobriyan [Thu, 20 Nov 2008 12:20:10 +0000 (04:20 -0800)]
net: fix tiny output corruption of /proc/net/snmp6
Because "name" is static, it can be occasionally be filled with
somewhat garbage if two processes read /proc/net/snmp6.
Also, remove useless casts and "-1" -- snprintf() correctly terminates it's
output.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Alan Jenkins [Thu, 20 Nov 2008 12:18:25 +0000 (04:18 -0800)]
atl2: don't request irq on resume if netif running
If the device is suspended with the cable disconnected, then
resumed with the cable connected, dev->open is called before
resume. During resume, we request an IRQ, but the IRQ was
already assigned during dev->open, resulting in the warning
shown below.
Don't request an IRQ if the device is running.
Call Trace:
[<
c011b89a>] warn_on_slowpath+0x40/0x59
[<
c023df15>] raw_pci_read+0x4d/0x55
[<
c023dff3>] pci_read+0x1c/0x21
[<
c01bcd81>] __pci_find_next_cap_ttl+0x44/0x70
[<
c01bce86>] __pci_find_next_cap+0x1a/0x1f
[<
c01bcef9>] pci_find_capability+0x28/0x2c
[<
c01c4144>] pci_msi_check_device+0x53/0x62
[<
c01c49c2>] pci_enable_msi+0x3a/0x1cd
[<
e019f17b>] atl2_write_phy_reg+0x40/0x5f [atl2]
[<
c01061b1>] dma_generic_alloc_coherent+0x0/0xd7
[<
e019f107>] atl2_request_irq+0x15/0x49 [atl2]
[<
e01a1481>] atl2_open+0x20b/0x297 [atl2]
[<
c024a35c>] dev_open+0x62/0x91
[<
c0248b9a>] dev_change_flags+0x93/0x141
[<
c024f308>] do_setlink+0x238/0x2d5
[<
c02501b2>] rtnl_setlink+0xa9/0xbf
[<
c0297f0c>] mutex_lock+0xb/0x19
[<
c024ffa7>] rtnl_dump_ifinfo+0x0/0x69
[<
c0250109>] rtnl_setlink+0x0/0xbf
[<
c024fe42>] rtnetlink_rcv_msg+0x185/0x19f
[<
c0240fd1>] sock_rmalloc+0x23/0x57
[<
c024fcbd>] rtnetlink_rcv_msg+0x0/0x19f
[<
c0259457>] netlink_rcv_skb+0x2d/0x71
[<
c024fcb7>] rtnetlink_rcv+0x14/0x1a
[<
c025929e>] netlink_unicast+0x184/0x1e4
[<
c025992a>] netlink_sendmsg+0x233/0x240
[<
c023f405>] sock_sendmsg+0xb7/0xd0
[<
c0129131>] autoremove_wake_function+0x0/0x2b
[<
c0129131>] autoremove_wake_function+0x0/0x2b
[<
c0147796>] mempool_alloc+0x2d/0x9e
[<
c020c923>] scsi_pool_alloc_command+0x35/0x4f
[<
c0297f0c>] mutex_lock+0xb/0x19
[<
c028e867>] unix_stream_recvmsg+0x357/0x3e2
[<
c01b81c9>] copy_from_user+0x23/0x4f
[<
c02452ea>] verify_iovec+0x3e/0x6c
[<
c023f5ab>] sys_sendmsg+0x18d/0x1f0
[<
c023ffa8>] sys_recvmsg+0x146/0x1c8
[<
c0240016>] sys_recvmsg+0x1b4/0x1c8
[<
c0118f48>] __wake_up+0xf/0x15
[<
c02586cd>] netlink_table_ungrab+0x17/0x19
[<
c01b83ba>] copy_to_user+0x25/0x3b
[<
c023fe4a>] move_addr_to_user+0x50/0x68
[<
c0240266>] sys_getsockname+0x6f/0x9a
[<
c0240280>] sys_getsockname+0x89/0x9a
[<
c015046a>] do_wp_page+0x3ae/0x41a
[<
c0151525>] handle_mm_fault+0x4c5/0x540
[<
c02405d0>] sys_socketcall+0x176/0x1b0
[<
c010376d>] sysenter_do_call+0x12/0x21
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Jay Cliburn <jcliburn@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Benjamin Thery [Thu, 20 Nov 2008 12:16:12 +0000 (04:16 -0800)]
ipv6: use seq_release_private for ip6mr.c /proc entries
In ip6mr.c, /proc entries /proc/net/ip6_mr_cache and /proc/net/ip6_mr_vif
are opened with seq_open_private(), thus seq_release_private() should be
used to release them.
Should fix a small memory leak.
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Patrick McHardy [Thu, 20 Nov 2008 12:07:14 +0000 (04:07 -0800)]
pkt_sched: fix missing check for packet overrun in qdisc_dump_stab()
nla_nest_start() might return NULL, causing a NULL pointer dereference.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 20 Nov 2008 12:01:29 +0000 (04:01 -0800)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6
Vernon Sauder [Thu, 20 Nov 2008 09:56:08 +0000 (01:56 -0800)]
smc911x: Fix printf format typo in smc911x driver.
Signed-off-by: Vernon Sauder <VernonInHand@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pantelis Koukousoulas [Thu, 20 Nov 2008 09:48:46 +0000 (01:48 -0800)]
asix: Fix asix-based cards connecting to 10/100Mbs LAN.
Add AX_MEDIUM_ENCK also when speed = 10/100Mbps. This allows my belkin
f5d5055 to work with my 100Mbps switch and with an old 10Mbps ISA card.
Without this patch, the card is recognized and the interface is brought
up fine, but no packets actually flow through the interface.
Signed-off-by: Pantelis Koukousoulas <pktoss@gmail.com>
Acked-by: David Hollis <dhollis@davehollis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lennert Buytenhek [Tue, 18 Nov 2008 04:28:58 +0000 (04:28 +0000)]
mv643xx_eth: fix recycle check bound
When mv643xx_eth allocates skbuffs, it adds
'dma_get_cache_alignment() - 1' to the length it needs, so that it can
align the skb's ->data pointer to a cache boundary. When checking
whether a transmitted skbuff can be reused as a receive buffer, these
bytes needs to be included into the minimum bound for the recycle check.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lennert Buytenhek [Tue, 18 Nov 2008 04:28:35 +0000 (04:28 +0000)]
mv643xx_eth: fix the order of mdiobus_{unregister, free}() calls
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nobuhiro Iwamatsu [Mon, 17 Nov 2008 20:29:58 +0000 (20:29 +0000)]
sh: sh_eth: Update to change of mii_bus
Update to change of mii_bus interface and fix some warning.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Balazs Scheidler [Thu, 20 Nov 2008 09:08:06 +0000 (01:08 -0800)]
TPROXY: supply a struct flowi->flags argument in inet_sk_rebuild_header()
inet_sk_rebuild_header() does a new route lookup if the dst_entry
associated with a socket becomes stale. However inet_sk_rebuild_header()
didn't use struct flowi->flags, causing the route lookup to
fail for foreign-bound IP_TRANSPARENT sockets, causing an error
state to be set for the sockets in question.
Signed-off-by: Balazs Scheidler <bazsi@balabit.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Balazs Scheidler [Thu, 20 Nov 2008 09:07:24 +0000 (01:07 -0800)]
TPROXY: fill struct flowi->flags in udp_sendmsg()
udp_sendmsg() didn't fill struct flowi->flags, which means that
the route lookup would fail for non-local IPs even if the
IP_TRANSPARENT sockopt was set.
This prevents sendto() to work properly for UDP sockets, whereas
bind(foreign-ip) + connect() + send() worked fine.
Signed-off-by: Balazs Scheidler <bazsi@balabit.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
M Kondrin [Fri, 14 Nov 2008 10:02:45 +0000 (13:02 +0300)]
USB: ACE1001 patch for cp2101.c
The patch which adds IDs for AKTAKOM USB->RS232 cable
(http://www.aktakom.ru/product/kio/ace-1001.htm) is attached.
From: M Kondrin <mkondrin@hppi.troitsk.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Pete Zaitcev [Fri, 14 Nov 2008 16:47:41 +0000 (09:47 -0700)]
USB: usbmon: fix read(2)
There's a bug in the usbmon binary reader: When using read() to fetch
the packets and a packet's data is partially read, the next read call
will once again return up to len_cap bytes of data. The b_read counter
is not regarded when determining the remaining chunk size.
So, when dumping USB data with "cat /dev/usbmon0 > usbmon.trace" while
reading from a USB storage device and analyzing the dump file
afterwards it will get out of sync after a couple of packets.
Signed-off-by: Ingo van Lil <inguin@gmx.de>
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Richard Röjfors [Sun, 16 Nov 2008 03:53:24 +0000 (19:53 -0800)]
USB: gadget rndis: send notifications
It turns out that atomic_inc_return() returns the *new* value
not the original one, so the logic in rndis_response_available()
kept the first RNDIS response notification from getting out.
This prevented interoperation with MS-Windows (but not Linux).
Fix this to make RNDIS behave again.
Signed-off-by: Richard Röjfors <richard.rojfors@endian.se>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>