drivers: autoconvert trivial BKL users to private mutex

[cascardo/linux.git] / drivers / char / mmtimer.c

diff --git a/drivers/char/mmtimer.c b/drivers/char/mmtimer.c
index ea7c99f..fe46978 100644 (file)
--- a/drivers/char/mmtimer.c
+++ b/drivers/char/mmtimer.c
@@ -32,7 +32,7 @@
 #include <linux/interrupt.h>
 #include <linux/time.h>
 #include <linux/math64.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <linux/slab.h>
 
 #include <asm/uaccess.h>
@@ -59,6 +59,7 @@ extern unsigned long sn_rtc_cycles_per_second;
 
 #define rtc_time()              (*RTC_COUNTER_ADDR)
 
+static DEFINE_MUTEX(mmtimer_mutex);
 static long mmtimer_ioctl(struct file *file, unsigned int cmd,
                                                unsigned long arg);
 static int mmtimer_mmap(struct file *file, struct vm_area_struct *vma);
@@ -371,7 +372,7 @@ static long mmtimer_ioctl(struct file *file, unsigned int cmd,
 {
        int ret = 0;
 
-       lock_kernel();
+       mutex_lock(&mmtimer_mutex);
 
        switch (cmd) {
        case MMTIMER_GETOFFSET: /* offset of the counter */
@@ -414,7 +415,7 @@ static long mmtimer_ioctl(struct file *file, unsigned int cmd,
                ret = -ENOTTY;
                break;
        }
-       unlock_kernel();
+       mutex_unlock(&mmtimer_mutex);
        return ret;
 }