linux-toradex.git/kernel, branch v2.6.31-rc5

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-07-30T23:46:58+00:00

* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing/stat: Fix seqfile memory leak
  function-graph: Fix seqfile memory leak
  trace_stack: Fix seqfile memory leak
  profile: Suppress warning about large allocations when profile=1 is specified

kprobes: Use kernel_text_address() for checking probe address

2009-07-30T23:44:06+00:00

Use kernel_text_address() for checking probe address instead of
__kernel_text_address(), because __kernel_text_address() returns true
for init functions even after relaseing those functions.

That will hit a BUG() in text_poke().

Signed-off-by: Masami Hiramatsu 
Cc: Ananth N Mavinakayanahalli 
Cc: Jim Keniston 
Signed-off-by: Linus Torvalds

profile: suppress warning about large allocations when profile=1 is specified

2009-07-30T02:10:36+00:00

When profile= is used, a large buffer is allocated early at boot.  This
can be larger than what the page allocator can provide so it prints a
warning.  However, the caller is able to handle the situation so this
patch suppresses the warning.

Signed-off-by: Mel Gorman 
Cc: "Rafael J. Wysocki" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cgroup avoid permanent sleep at rmdir

2009-07-30T02:10:35+00:00

After commit ec64f51545fffbc4cb968f0cea56341a4b07e85a ("cgroup: fix
frequent -EBUSY at rmdir"), cgroup's rmdir (especially against memcg)
doesn't return -EBUSY by temporary ref counts.  That commit expects all
refs after pre_destroy() is temporary but...it wasn't.  Then, rmdir can
wait permanently.  This patch tries to fix that and change followings.

 - set CGRP_WAIT_ON_RMDIR flag before pre_destroy().
 - clear CGRP_WAIT_ON_RMDIR flag when the subsys finds racy case.
   if there are sleeping ones, wakes them up.
 - rmdir() sleeps only when CGRP_WAIT_ON_RMDIR flag is set.

Tested-by: Daisuke Nishimura 
Reported-by: Daisuke Nishimura 
Reviewed-by: Paul Menage 
Acked-by: Balbir Sigh 
Signed-off-by: KAMEZAWA Hiroyuki 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cgroups: fix pid namespace bug

2009-07-30T02:10:35+00:00

The bug was introduced by commit cc31edceee04a7b87f2be48f9489ebb72d264844
("cgroups: convert tasks file to use a seq_file with shared pid array").

We cache a pid array for all threads that are opening the same "tasks"
file, but the pids in the array are always from the namespace of the
last process that opened the file, so all other threads will read pids
from that namespace instead of their own namespaces.

To fix it, we maintain a list of pid arrays, which is keyed by pid_ns.
The list will be of length 1 at most time.

Reported-by: Paul Menage 
Idea-by: Paul Menage 
Signed-off-by: Li Zefan 
Reviewed-by: Serge Hallyn 
Cc: Balbir Singh 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kexec: fix omitting offset in extended crashkernel syntax

2009-07-30T02:10:34+00:00

Setting
 "crashkernel=512M-2G:64M,2G-:128M"
does not work but it turns to work if it has a trailing-whitespace,
like
 "crashkernel=512M-2G:64M,2G-:128M ".

It was because of a bug in the parser, running over the cmdline.

This patch adds a check of the termination.

Reported-by: Jin Dongming 
Signed-off-by: Hidetoshi Seto 
Tested-by: Jin Dongming 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: copy over oom_adj value at fork time

2009-07-30T02:10:34+00:00

Fix a post-2.6.31 regression which was introduced by
2ff05b2b4eac2e63d345fc731ea151a060247f53 ("oom: move oom_adj value from
task_struct to mm_struct").

After moving the oom_adj value from the task struct to the mm_struct, the
oom_adj value was no longer properly inherited by child processes.

Copying over the oom_adj value at fork time fixes that bug.

[kosaki.motohiro@jp.fujitsu.com: test for current->mm before dereferencing it]
Signed-off-by: Rik van Riel 
Reported-by: Paul Menage 
Cc: KOSAKI Motohiro 
Acked-by: David Rientjes 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

update the comment in kthread_stop()

2009-07-27T19:15:46+00:00

Commit 63706172f332fd3f6e7458ebfb35fa6de9c21dc5 ("kthreads: rework
kthread_stop()") removed the limitation that the thread function mysr
not call do_exit() itself, but forgot to update the comment.

Since that commit it is OK to use kthread_stop() even if kthread can
exit itself.

Signed-off-by: Oleg Nesterov 
Signed-off-by: Rusty Russell 
Signed-off-by: Linus Torvalds

module: use MODULE_SYMBOL_PREFIX with module_layout

2009-07-27T19:15:45+00:00

The check_modstruct_version() needs to look up the symbol "module_layout"
in the kernel, but it does so literally and not by a C identifier.  The
trouble is that it does not include a symbol prefix for those ports that
need it (like the Blackfin and H8300 port).  So make sure we tack on the
MODULE_SYMBOL_PREFIX define to the front of it.

Signed-off-by: Mike Frysinger 
Signed-off-by: Rusty Russell 
Signed-off-by: Linus Torvalds

tracing/stat: Fix seqfile memory leak

2009-07-23T13:53:55+00:00

Every time we cat a trace_stat file, we leak memory allocated by
seq_open().

Also fix memory leak in a failure path in tracing_stat_open().

Signed-off-by: Li Zefan 
LKML-Reference: <4A67D92B.4060704@cn.fujitsu.com>
Signed-off-by: Steven Rostedt