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TTY: remove tty_locked

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We used it really only serial and ami_serial. The rest of the
callsites were BUG/WARN_ONs to check if BTM is held. Now that we
pruned tty_locked from both of the real users, we can get rid of
tty_lock along with __big_tty_mutex_owner.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Slaby 2011-07-14 14:35:14 +02:00 • committed by Greg Kroah-Hartman
commit 906cbe1364
5 changed files with 2 additions and 21 deletions
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2
include/linux/tty.h
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@ -600,8 +600,6 @@ extern long vt_compat_ioctl(struct tty_struct *tty,
/* functions for preparation of BKL removal */
extern void __lockfunc tty_lock(void) __acquires(tty_lock);
extern void __lockfunc tty_unlock(void) __releases(tty_lock);
extern struct task_struct *__big_tty_mutex_owner;
#define tty_locked() (current == __big_tty_mutex_owner)
/*
* wait_event_interruptible_tty -- wait for a condition with the tty lock held