diff options
Diffstat (limited to 'arch/arm/common/rtctime.c')
| -rw-r--r-- | arch/arm/common/rtctime.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c index ffb82d5bede..48b1e19b131 100644 --- a/arch/arm/common/rtctime.c +++ b/arch/arm/common/rtctime.c @@ -19,6 +19,7 @@ #include <linux/spinlock.h> #include <linux/capability.h> #include <linux/device.h> +#include <linux/mutex.h> #include <asm/rtc.h> #include <asm/semaphore.h> @@ -35,7 +36,7 @@ static unsigned long rtc_irq_data; /* * rtc_sem protects rtc_inuse and rtc_ops */ -static DECLARE_MUTEX(rtc_sem); +static DEFINE_MUTEX(rtc_mutex); static unsigned long rtc_inuse; static struct rtc_ops *rtc_ops; @@ -356,7 +357,7 @@ static int rtc_open(struct inode *inode, struct file *file) { int ret; - down(&rtc_sem); + mutex_lock(&rtc_mutex); if (rtc_inuse) { ret = -EBUSY; @@ -374,7 +375,7 @@ static int rtc_open(struct inode *inode, struct file *file) rtc_inuse = 1; } } - up(&rtc_sem); + mutex_unlock(&rtc_mutex); return ret; } @@ -480,7 +481,7 @@ int register_rtc(struct rtc_ops *ops) { int ret = -EBUSY; - down(&rtc_sem); + mutex_lock(&rtc_mutex); if (rtc_ops == NULL) { rtc_ops = ops; @@ -489,7 +490,7 @@ int register_rtc(struct rtc_ops *ops) create_proc_read_entry("driver/rtc", 0, NULL, rtc_read_proc, ops); } - up(&rtc_sem); + mutex_unlock(&rtc_mutex); return ret; } @@ -497,12 +498,12 @@ EXPORT_SYMBOL(register_rtc); void unregister_rtc(struct rtc_ops *rtc) { - down(&rtc_sem); + mutex_lock(&rtc_mutex); if (rtc == rtc_ops) { remove_proc_entry("driver/rtc", NULL); misc_deregister(&rtc_miscdev); rtc_ops = NULL; } - up(&rtc_sem); + mutex_unlock(&rtc_mutex); } EXPORT_SYMBOL(unregister_rtc); |