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[PATCH] do_group_exit: don't take tasklist_lock

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do_group_exit() takes tasklist_lock for zap_other_threads(), this is unneeded
now.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Oleg Nesterov 2006-03-28 16:11:23 -08:00 • committed by Linus Torvalds
parent a122b341b7
commit aacc90944d
1 changed files with 0 additions and 2 deletions
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2
kernel/exit.c
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@ -985,7 +985,6 @@ do_group_exit(int exit_code)
else if (!thread_group_empty(current)) { else if (!thread_group_empty(current)) {
struct signal_struct *const sig = current->signal; struct signal_struct *const sig = current->signal;
struct sighand_struct *const sighand = current->sighand; struct sighand_struct *const sighand = current->sighand;
read_lock(&tasklist_lock);
spin_lock_irq(&sighand->siglock); spin_lock_irq(&sighand->siglock);
if (sig->flags & SIGNAL_GROUP_EXIT) if (sig->flags & SIGNAL_GROUP_EXIT)
/* Another thread got here before we took the lock. */ /* Another thread got here before we took the lock. */
@ -995,7 +994,6 @@ do_group_exit(int exit_code)
zap_other_threads(current); zap_other_threads(current);
} }
spin_unlock_irq(&sighand->siglock); spin_unlock_irq(&sighand->siglock);
read_unlock(&tasklist_lock);
} }
do_exit(exit_code); do_exit(exit_code);