[PATCH] Don't inherit ->splice_pipe across forks

It's really task private, so clear that field on fork after copying
task structure.

Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/kernel/fork.c b/kernel/fork.c
index 3451577..d2fa57d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -180,6 +180,7 @@
 	atomic_set(&tsk->usage,2);
 	atomic_set(&tsk->fs_excl, 0);
 	tsk->btrace_seq = 0;
+	tsk->splice_pipe = NULL;
 	return tsk;
 }