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Commit 83c67571 authored by Jiri Slaby's avatar Jiri Slaby Committed by Greg Kroah-Hartman
Browse files

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: default avatarJiri Slaby <jslaby@suse.cz>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent c831cff2

drivers/tty/tty_io.c

+2 −0
Original line number Diff line number Diff line
@@ -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)