jump_label: jump_label_inc may return before the code is patched

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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: stable@vger.kernel.org
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>

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Gleb Natapov 2011-10-18 19:55:51 +02:00 • committed by Steven Rostedt

parent 8ee3c92b7f

commit c8452afb74

1 changed files with 2 additions and 1 deletions

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kernel/jump_label.c

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