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tty: Don't protect atomic operation with mutex 

test_bit() is already atomic; drop mutex lock/unlock.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Peter Hurley 2013-03-11 16:44:39 -04:00 committed by Greg Kroah-Hartman
parent fc575ee6ea
commit 8842dda236
1 changed files with 0 additions and 2 deletions
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2
drivers/tty/tty_io.c
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@ -1391,9 +1391,7 @@ 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;
}