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path: root/drivers/char/genrtc.c
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Diffstat (limited to 'drivers/char/genrtc.c')
-rw-r--r--drivers/char/genrtc.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c
index b6c2cc167c11..2aa69f97360d 100644
--- a/drivers/char/genrtc.c
+++ b/drivers/char/genrtc.c
@@ -52,7 +52,7 @@
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <asm/uaccess.h>
@@ -66,6 +66,7 @@
* ioctls.
*/
+static DEFINE_MUTEX(gen_rtc_mutex);
static DECLARE_WAIT_QUEUE_HEAD(gen_rtc_wait);
/*
@@ -337,9 +338,9 @@ static long gen_rtc_unlocked_ioctl(struct file *file, unsigned int cmd,
{
int ret;
- lock_kernel();
+ mutex_lock(&gen_rtc_mutex);
ret = gen_rtc_ioctl(file, cmd, arg);
- unlock_kernel();
+ mutex_unlock(&gen_rtc_mutex);
return ret;
}
@@ -352,16 +353,16 @@ static long gen_rtc_unlocked_ioctl(struct file *file, unsigned int cmd,
static int gen_rtc_open(struct inode *inode, struct file *file)
{
- lock_kernel();
+ mutex_lock(&gen_rtc_mutex);
if (gen_rtc_status & RTC_IS_OPEN) {
- unlock_kernel();
+ mutex_unlock(&gen_rtc_mutex);
return -EBUSY;
}
gen_rtc_status |= RTC_IS_OPEN;
gen_rtc_irq_data = 0;
irq_active = 0;
- unlock_kernel();
+ mutex_unlock(&gen_rtc_mutex);
return 0;
}