From: Pavel Emelyanov <xemul@openvz.org>

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@openvz.org>
Acked-by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/signalfd.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN fs/signalfd.c~isolate-some-explicit-usage-of-task-tgid-fix fs/signalfd.c
--- a/fs/signalfd.c~isolate-some-explicit-usage-of-task-tgid-fix
+++ a/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;
_