#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/uaccess.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <asm/system.h>
+static DEFINE_MUTEX(nvram_mutex);
static DEFINE_SPINLOCK(nvram_state_lock);
static int nvram_open_cnt; /* #times opened */
static int nvram_open_mode; /* special open modes */
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- lock_kernel();
+ mutex_lock(&nvram_mutex);
spin_lock_irq(&rtc_lock);
for (i = 0; i < NVRAM_BYTES; ++i)
__nvram_set_checksum();
spin_unlock_irq(&rtc_lock);
- unlock_kernel();
+ mutex_unlock(&nvram_mutex);
return 0;
case NVRAM_SETCKS:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- lock_kernel();
+ mutex_lock(&nvram_mutex);
spin_lock_irq(&rtc_lock);
__nvram_set_checksum();
spin_unlock_irq(&rtc_lock);
- unlock_kernel();
+ mutex_unlock(&nvram_mutex);
return 0;
default: