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exit: change zap_other_threads() to count sub-threads

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Change zap_other_threads() to return the number of other sub-threads found
on ->thread_group list.

Other changes are cosmetic:

	- change the code to use while_each_thread() helper

	- remove the obsolete comment about SIGKILL/SIGSTOP

Signed-off-by: Oleg Nesterov <[email protected]>
Acked-by: Roland McGrath <[email protected]>
Cc: Veaceslav Falico <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oleg Nesterov 2010-05-26 14:43:11 -07:00 • committed by Linus Torvalds
commit 09faef11df
2 changed files with 10 additions and 9 deletions
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17
kernel/signal.c
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@ -1085,23 +1085,24 @@ force_sig_info(int sig, struct siginfo *info, struct task_struct *t)
/*
* Nuke all other threads in the group.
*/
void zap_other_threads(struct task_struct *p)
int zap_other_threads(struct task_struct *p)
{
struct task_struct *t;
struct task_struct *t = p;
int count = 0;
p->signal->group_stop_count = 0;
for (t = next_thread(p); t != p; t = next_thread(t)) {
/*
* Don't bother with already dead threads
*/
while_each_thread(p, t) {
count++;
/* Don't bother with already dead threads */
if (t->exit_state)
continue;
/* SIGKILL will be handled before any pending SIGSTOP */
sigaddset(&t->pending.signal, SIGKILL);
signal_wake_up(t, 1);
}
return count;
}
struct sighand_struct *lock_task_sighand(struct task_struct *tsk, unsigned long *flags)