From a2322e1d272938d192d8c24cdacf57c0c7a2683f Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Wed, 23 Sep 2009 15:56:45 -0700 Subject: [PATCH] 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 Acked-by: Roland McGrath Cc: Ingo Molnar Cc: Ratan Nalumasu Cc: Vitaly Mayatskikh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/exit.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/kernel/exit.c b/kernel/exit.c index 782b2e1f7ca..ef2dfa818bf 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,