diff options
Diffstat (limited to 'drivers/char/genrtc.c')
| -rw-r--r-- | drivers/char/genrtc.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c index eaa0e4264e16..f773a9dd14f3 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; } |