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| author | Oleg Nesterov <oleg@redhat.com> | 2009-09-23 15:56:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-24 07:20:59 -0700 |
| commit | a2322e1d272938d192d8c24cdacf57c0c7a2683f (patch) | |
| tree | f53bbed32d44a190df42cddc9f3635371272e329 /kernel/exit.c | |
| parent | a7f0765edfd53aed09cb7b0e15863688b39447de (diff) | |
| download | blackbird-op-linux-a2322e1d272938d192d8c24cdacf57c0c7a2683f.tar.gz blackbird-op-linux-a2322e1d272938d192d8c24cdacf57c0c7a2683f.zip | |
do_wait() wakeup optimization: shift security_task_wait() from eligible_child() to wait_consider_task()
Preparation, no functional changes.
eligible_child() has a single caller, wait_consider_task(). We can move
security_task_wait() out from eligible_child(), this allows us to use it
for filtered wake_up().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ratan Nalumasu <rnalumasu@gmail.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/exit.c')
| -rw-r--r-- | kernel/exit.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 782b2e1f7ca2..ef2dfa818bf1 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1112,8 +1112,6 @@ static struct pid *task_pid_type(struct task_struct *task, enum pid_type type) static int eligible_child(struct wait_opts *wo, struct task_struct *p) { - int err; - if (wo->wo_type < PIDTYPE_MAX) { if (task_pid_type(p, wo->wo_type) != wo->wo_pid) return 0; @@ -1128,10 +1126,6 @@ static int eligible_child(struct wait_opts *wo, struct task_struct *p) && !(wo->wo_flags & __WALL)) return 0; - err = security_task_wait(p); - if (err) - return err; - return 1; } @@ -1492,6 +1486,7 @@ static int wait_consider_task(struct wait_opts *wo, struct task_struct *parent, if (!ret) return ret; + ret = security_task_wait(p); if (unlikely(ret < 0)) { /* * If we have not yet seen any eligible child, |
