tree 3ac61b738f2738a76e0326da7e58433fbd79d6d2
parent 4e52365f279564cef0ddd41db5237f0471381093
author Oleg Nesterov <oleg@redhat.com> 1402090604 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1402096091 -0700

ptrace: task_clear_jobctl_trapping()->wake_up_bit() needs mb()

__wake_up_bit() checks waitqueue_active() and thus the caller needs mb()
as wake_up_bit() documents, fix task_clear_jobctl_trapping().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>