Commit 97101eb4 authored May 26, 2010 by Oleg Nesterov Committed by Linus Torvalds May 27, 2010

exit: move taskstats_tgid_free() from __exit_signal() to free_signal_struct()

Move taskstats_tgid_free() from __exit_signal() to free_signal_struct().

This way signal->stats never points to nowhere and we can read ->stats
lockless.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Veaceslav Falico <vfalico@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent a705be6b

kernel/exit.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -144,7 +144,6 @@ static void __exit_signal(struct task_struct *tsk)
		clear_tsk_thread_flag(tsk,TIF_SIGPENDING);
		if (group_dead) {
		flush_sigqueue(&sig->shared_pending);
		taskstats_tgid_free(sig);
		tty_kref_put(tty);
		}
		}

kernel/fork.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -167,6 +167,7 @@ EXPORT_SYMBOL(free_task);

		static inline void free_signal_struct(struct signal_struct *sig)
		{
		taskstats_tgid_free(sig);
		kmem_cache_free(signal_cachep, sig);
		}