console: rename acquire/release_console_sem() to console_lock/unlock()
The -rt patches change the console_semaphore to console_mutex. As a
result, a quite large chunk of the patches changes all
acquire/release_console_sem() to acquire/release_console_mutex()
This commit makes things use more neutral function names which dont make
implications about the underlying lock.
The only real change is the return value of console_trylock which is
inverted from try_acquire_console_sem()
This patch also paves the way to switching console_sem from a semaphore to
a mutex.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: make console_trylock return 1 on success, per Geert]
Signed-off-by: Torben Hohn <torbenh@gmx.de>
Cc: Thomas Gleixner <tglx@tglx.de>
Cc: Greg KH <gregkh@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index eab3a1f..a672ed1 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -202,7 +202,7 @@
/* Select the proper current console and verify
* sanity of the situation under the console lock.
*/
- acquire_console_sem();
+ console_lock();
attr = (currcons & 128);
currcons = (currcons & 127);
@@ -336,9 +336,9 @@
* the pagefault handling code may want to call printk().
*/
- release_console_sem();
+ console_unlock();
ret = copy_to_user(buf, con_buf_start, orig_count);
- acquire_console_sem();
+ console_lock();
if (ret) {
read += (orig_count - ret);
@@ -354,7 +354,7 @@
if (read)
ret = read;
unlock_out:
- release_console_sem();
+ console_unlock();
mutex_unlock(&con_buf_mtx);
return ret;
}
@@ -379,7 +379,7 @@
/* Select the proper current console and verify
* sanity of the situation under the console lock.
*/
- acquire_console_sem();
+ console_lock();
attr = (currcons & 128);
currcons = (currcons & 127);
@@ -414,9 +414,9 @@
/* Temporarily drop the console lock so that we can read
* in the write data from userspace safely.
*/
- release_console_sem();
+ console_unlock();
ret = copy_from_user(con_buf, buf, this_round);
- acquire_console_sem();
+ console_lock();
if (ret) {
this_round -= ret;
@@ -542,7 +542,7 @@
vcs_scr_updated(vc);
unlock_out:
- release_console_sem();
+ console_unlock();
mutex_unlock(&con_buf_mtx);