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| author | Gleb Natapov <gleb@redhat.com> | 2011-10-18 19:55:51 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:55:54 -0800 |
| commit | cf246087a19a4958fba3123d21f1359b6177ddb5 (patch) | |
| tree | 9d857d9ddf07d826bb2718ceff8b80dfb210bb4e /kernel/rtmutex-tester.c | |
| parent | 6bdf07f3dd1c2874792bb07cd84d4210cbc15ca7 (diff) | |
jump_label: jump_label_inc may return before the code is patched
commit bbbf7af4bf8fc69bc751818cf30521080fa47dcb upstream.
If cpu A calls jump_label_inc() just after atomic_add_return() is
called by cpu B, atomic_inc_not_zero() will return value greater then
zero and jump_label_inc() will return to a caller before jump_label_update()
finishes its job on cpu B.
Link: http://lkml.kernel.org/r/20111018175551.GH17571@redhat.com
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel/rtmutex-tester.c')
0 files changed, 0 insertions, 0 deletions