[PATCH -mm 1/3] nbd: nbd_thread_send: remove the unnecessary kernel_dequeue_signal()

[Oleg Nesterov <oleg@redhat.com>]

nbd_thread_send() does kernel_dequeue_signal() at the end for no reason,
it is fine to exit with the pending SIGKILL.

Not sure it really needs another kernel_dequeue_signal() inside the
main loop, we know that signal_pending() means SIGKILL. But probably
we want to clear TIF_SIGPENDING before sock_shutdown().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 drivers/block/nbd.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index b85e7a0..e5d96e5 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -586,10 +586,6 @@ static int nbd_thread_send(void *data)
 	nbd->task_send = NULL;
 	spin_unlock_irqrestore(&nbd->tasks_lock, flags);
 
-	/* Clear maybe pending signals */
-	if (signal_pending(current))
-		kernel_dequeue_signal(NULL);
-
 	return 0;
 }
 
-- 
1.5.5.1