linux-kernel - [PATCH] vt: drop redundant might_sleep() in do_con

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Date:   Sun, 23 Feb 2020 23:34:50 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] vt: drop redundant might_sleep() in do_con_write()

From: Eric Biggers <ebiggers@...gle.com>

The might_sleep() in do_con_write() is redundant because console_lock()
already contains might_sleep().  Remove it.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 drivers/tty/vt/vt.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 0cfbb7182b5a5..a9fe30efa304b 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -2576,8 +2576,6 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
 	if (in_interrupt())
 		return count;
 
-	might_sleep();
-
 	console_lock();
 	vc = tty->driver_data;
 	if (vc == NULL) {
-- 
2.25.1