#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/delay.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/bcd.h>
#include <linux/capability.h>
#define RTC_MAJOR_NR 121 /* local major, change later */
+static DEFINE_MUTEX(ds1302_mutex);
static const char ds1302_name[] = "ds1302";
/* The DS1302 might be connected to different bits on different products.
{
int ret;
- lock_kernel();
+ mutex_lock(&ds1302_mutex);
ret = rtc_ioctl(file, cmd, arg);
- unlock_kernel();
+ mutex_unlock(&ds1302_mutex);
return ret;
}