From: Jens Axboe <axboe@kernel.dk>
Date: Wed, 2 Sep 2020 18:44:20 +0000 (-0600)
Subject: io_uring: io_sq_thread() doesn't need to flush signals
X-Git-Tag: v5.10.7~1461^2~48
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e35afcf91230238dc27f98d1cd7cb787474b28cb;p=platform%2Fkernel%2Flinux-rpi.git

io_uring: io_sq_thread() doesn't need to flush signals

We're not handling signals by default in kernel threads, and we never
use TWA_SIGNAL for the SQPOLL thread internally. Hence we can never
have a signal pending, and we don't need to check for it (nor flush it).

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b8fdb10..26f819a 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6709,8 +6709,6 @@ static int io_sq_thread(void *data)
 					io_ring_clear_wakeup_flag(ctx);
 					continue;
 				}
-				if (signal_pending(current))
-					flush_signals(current);
 				schedule();
 				finish_wait(&ctx->sqo_wait, &wait);