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wait_task_stopped(): remove unneeded delay_group_leader check

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wait_task_stopped() doesn't need the "delay_group_leader" parameter.  If
the child is not traced it must be a group leader.  With or without
subthreads ->group_stop_count == 0 when the whole task is stopped.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Mika Penttila <mika.penttila@kolumbus.fi>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2008-02-08 04:19:03 -08:00 committed by Linus Torvalds
parent 20686a309a
commit 1bad95c3be
1 changed files with 3 additions and 4 deletions
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7
kernel/exit.c
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@ -1351,7 +1351,7 @@ static int wait_task_zombie(struct task_struct *p, int noreap,
* the lock and this task is uninteresting. If we return nonzero, we have
* released the lock and the system call should return.
*/
static int wait_task_stopped(struct task_struct *p, int delayed_group_leader,
static int wait_task_stopped(struct task_struct *p,
int noreap, struct siginfo __user *infop,
int __user *stat_addr, struct rusage __user *ru)
{
@ -1365,8 +1365,7 @@ static int wait_task_stopped(struct task_struct *p, int delayed_group_leader,
if (unlikely(!task_is_stopped_or_traced(p)))
goto unlock_sig;
if (delayed_group_leader && !(p->ptrace & PT_PTRACED) &&
p->signal->group_stop_count > 0)
if (!(p->ptrace & PT_PTRACED) && p->signal->group_stop_count > 0)
/*
* A group stop is in progress and this is the group leader.
* We won't report until all threads have stopped.
@ -1522,7 +1521,7 @@ static long do_wait(pid_t pid, int options, struct siginfo __user *infop,
!(options & WUNTRACED))
continue;
retval = wait_task_stopped(p, ret == 2,
retval = wait_task_stopped(p,
(options & WNOWAIT), infop,
stat_addr, ru);
} else if (p->exit_state == EXIT_ZOMBIE) {