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authorJiri Slaby <jslaby@suse.cz>2011-07-14 16:35:14 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-08-23 21:34:07 +0400
commit906cbe1364d94da7cbf74c1d05e3e78b2883f661 (patch)
treefca513a03781a2d0e2ac518aab13c8d528a0468c /drivers/tty/tty_mutex.c
parenteff4b0b9fe37873d3dc7ade0e08e6f0f89279b8b (diff)
downloadlinux-906cbe1364d94da7cbf74c1d05e3e78b2883f661.tar.xz
TTY: remove tty_locked
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>
Diffstat (limited to 'drivers/tty/tty_mutex.c')
-rw-r--r--drivers/tty/tty_mutex.c12
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c
index 3b2bb7719442..9ff986c32a21 100644
--- a/drivers/tty/tty_mutex.c
+++ b/drivers/tty/tty_mutex.c
@@ -15,30 +15,18 @@
* Don't use in new code.
*/
static DEFINE_MUTEX(big_tty_mutex);
-struct task_struct *__big_tty_mutex_owner;
-EXPORT_SYMBOL_GPL(__big_tty_mutex_owner);
/*
* Getting the big tty mutex.
*/
void __lockfunc tty_lock(void)
{
- struct task_struct *task = current;
-
- WARN_ON(__big_tty_mutex_owner == task);
-
mutex_lock(&big_tty_mutex);
- __big_tty_mutex_owner = task;
}
EXPORT_SYMBOL(tty_lock);
void __lockfunc tty_unlock(void)
{
- struct task_struct *task = current;
-
- WARN_ON(__big_tty_mutex_owner != task);
- __big_tty_mutex_owner = NULL;
-
mutex_unlock(&big_tty_mutex);
}
EXPORT_SYMBOL(tty_unlock);