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authorArnd Bergmann <arnd@arndb.de>2010-09-11 19:31:43 +0200
committerArnd Bergmann <arnd@arndb.de>2010-10-19 11:29:54 +0200
commitefbec1cd042008b49fe3cad45604088c54905a06 (patch)
tree21135467cb576f4b96fb09c28731488583a4137b
parentc4a047272566b44b44222369d50a307c708c4f74 (diff)
downloadlinux-linaro-efbec1cd042008b49fe3cad45604088c54905a06.tar.gz
tlclk: remove big kernel lock
This driver already has a global mutex, so let's just use that in the open function instead of the BKL. It may not even be needed there, but this patch should have the smallest impact. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Mark Gross <mark.gross@intel.com>
-rw-r--r--drivers/char/tlclk.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/char/tlclk.c b/drivers/char/tlclk.c
index 80ea6bcfffd..e32cbf0c9a0 100644
--- a/drivers/char/tlclk.c
+++ b/drivers/char/tlclk.c
@@ -37,7 +37,7 @@
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/timer.h>
#include <linux/sysfs.h>
#include <linux/device.h>
@@ -206,7 +206,7 @@ static int tlclk_open(struct inode *inode, struct file *filp)
{
int result;
- lock_kernel();
+ mutex_lock(&tlclk_mutex);
if (test_and_set_bit(0, &useflags)) {
result = -EBUSY;
/* this legacy device is always one per system and it doesn't
@@ -229,7 +229,7 @@ static int tlclk_open(struct inode *inode, struct file *filp)
inb(TLCLK_REG6); /* Clear interrupt events */
out:
- unlock_kernel();
+ mutex_unlock(&tlclk_mutex);
return result;
}