[PATCH] Use same_thread_group() in signalfd.c

[Pavel Emelyanov]

This is a lost hunk of previous patch that isolated the
explicit usage of task->tgid in some places. The signalfd
code uses the tsk->tgid comparison.

Signed-off-by: Pavel Emelyanov <xemul at openvz.org>

---

diff --git a/fs/signalfd.c b/fs/signalfd.c
index a8e293d..5bfd2c5 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -64,7 +64,7 @@ static int signalfd_lock(struct signalfd
 		return 0;
 	}
 
-	if (lk->tsk->tgid == current->tgid)
+	if (same_thread_group(lk->tsk, current->tgid))
 		lk->tsk = current;
 
 	return 1;