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authorJiri Slaby <jslaby@suse.cz>2011-04-20 10:43:18 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-25 14:19:12 -0700
commit83c67571b372c4a40023a84e183fdb7fa4e89e48 (patch)
tree3865faaf2546860e5107ac6709f39c1d352e7743 /drivers/tty/tty_io.c
parentc831cff256c86588976e66bef7897633d534846c (diff)
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TTY: tty_io, annotate locking functions
tty_write_lock and tty_write_unlock contain imbalanced locking. But this is intentional, so mark them appropriately by __acquires/__releases. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/tty_io.c')
-rw-r--r--drivers/tty/tty_io.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 3f4ad9885430..6556f7452ba6 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -962,12 +962,14 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
}
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);
}
int tty_write_lock(struct tty_struct *tty, int ndelay)
+ __acquires(&tty->atomic_write_lock)
{
if (!mutex_trylock(&tty->atomic_write_lock)) {
if (ndelay)
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