From 369e2b84e4eed08e5368abc3bc4277d500a186ea Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Thu, 16 Oct 2014 14:19:49 -0400 Subject: [PATCH] tty: Remove sparse lock annotations from tty_write_lock()/_unlock() sparse lock annotations cannot represent conditional acquire, such as mutex_lock_interruptible() or mutex_trylock(), and produce sparse warnings at _every_ correct call site. Remove lock annotations from tty_write_lock() and tty_write_unlock(). Fixes sparse warnings: drivers/tty/tty_io.c:1083:13: warning: context imbalance in 'tty_write_unlock' - wrong count at exit drivers/tty/tty_io.c:1090:12: warning: context imbalance in 'tty_write_lock' - wrong count at exit drivers/tty/tty_io.c:1211:17: warning: context imbalance in 'tty_write_message' - unexpected unlock drivers/tty/tty_io.c:1233:16: warning: context imbalance in 'tty_write' - different lock contexts for basic block drivers/tty/tty_io.c:1285:5: warning: context imbalance in 'tty_send_xchar' - different lock contexts for basic block drivers/tty/tty_io.c:2653:12: warning: context imbalance in 'send_break' - different lock contexts for basic block Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- 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 16a2c0237dd6..c322e7af7373 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1024,14 +1024,12 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count, } static void tty_write_unlock(struct tty_struct *tty) - __releases(&tty->atomic_write_lock) { mutex_unlock(&tty->atomic_write_lock); wake_up_interruptible_poll(&tty->write_wait, POLLOUT); } static int tty_write_lock(struct tty_struct *tty, int ndelay) - __acquires(&tty->atomic_write_lock) { if (!mutex_trylock(&tty->atomic_write_lock)) { if (ndelay) -- 2.34.1