Prev: x86: add arch_compat_syscall_addr()
Next: [PATCH 0/4] signal_struct->count must die, initial changes
From: Oleg Nesterov on 17 Mar 2010 15:40
Change __exit_signal() to check thread_group_leader() instead of
atomic_dec_and_test(&sig->count). This must be equivalent, the
group leader must be released only after all other threads have
exited and passed __exit_signal().

From now sig->count is not actually used, except in fs/proc for
get_nr_threads/etc.

Signed-off-by: Oleg Nesterov <oleg(a)redhat.com>
---


--- 34-rc1/kernel/exit.c~4_EXIT_SIGNAL 2010-03-17 19:37:18.000000000 +0100
+++ 34-rc1/kernel/exit.c 2010-03-17 20:05:38.000000000 +0100
@@ -89,11 +89,12 @@ static void __exit_signal(struct task_st
rcu_read_lock_held() ||
lockdep_is_held(&tasklist_lock));
spin_lock(&sighand->siglock);
+ atomic_dec(&sig->count);

posix_cpu_timers_exit(tsk);
- if (atomic_dec_and_test(&sig->count))
+ if (thread_group_leader(tsk)) {
posix_cpu_timers_exit_group(tsk);
- else {
+ } else {
/*
* If there is any task waiting for the group exit
* then notify it:

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: x86: add arch_compat_syscall_addr()
Next: [PATCH 0/4] signal_struct->count must die, initial changes