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Subject[PATCH v4 19/32] tty: Don't protect atomic operation with mutex
Date
test_bit() is already atomic; drop mutex lock/unlock.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
drivers/tty/tty_io.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index cfcd849..2261c21 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1345,9 +1345,7 @@ static int tty_reopen(struct tty_struct *tty)
}
tty->count++;

- mutex_lock(&tty->ldisc_mutex);
WARN_ON(!test_bit(TTY_LDISC, &tty->flags));
- mutex_unlock(&tty->ldisc_mutex);

return 0;
}
--
1.8.1.2


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