linux-kernel - [PATCH] drivers:s390:char:move spin_lock_bh to spin

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Message-Id: <20180907155213.46439-1-hangdianqj@163.com>
Date:   Fri,  7 Sep 2018 08:52:13 -0700
From:   jun qian <hangdianqj@....com>
To:     Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Kees Cook <keescook@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        jun qian <hangdianqj@....com>, Barry song <21cnbao@...il.com>
Subject: [PATCH] drivers:s390:char:move spin_lock_bh to spin_lock in tasklet

As you are already in a tasklet, it is unnecessary to call spin_lock_bh.

Signed-off-by: jun qian <hangdianqj@....com>
Cc: Barry song <21cnbao@...il.com>
---
 drivers/s390/char/tty3270.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 5b8af2782282..fb1bc0db7e68 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -563,7 +563,7 @@ tty3270_read_tasklet(struct raw3270_request *rrq)
 	char *input;
 	int len;
 
-	spin_lock_bh(&tp->view.lock);
+	spin_lock(&tp->view.lock);
 	/*
 	 * Two AID keys are special: For 0x7d (enter) the input line
 	 * has to be emitted to the tty and for 0x6d the screen
@@ -590,7 +590,7 @@ tty3270_read_tasklet(struct raw3270_request *rrq)
 		tp->update_flags = TTY_UPDATE_ALL;
 		tty3270_set_timer(tp, 1);
 	}
-	spin_unlock_bh(&tp->view.lock);
+	spin_unlock(&tp->view.lock);
 
 	/* Start keyboard reset command. */
 	raw3270_request_reset(tp->kreset);
-- 
2.17.1