1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index 697202e27891..8e540ada47d2 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -35,7 +35,6 @@
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/hwmon.h>
-#include <linux/smp_lock.h>
 #include <linux/hwmon-vid.h>
 #include <linux/hwmon-sysfs.h>
 #include <linux/err.h>
@@ -52,6 +51,7 @@
 #define WATCHDOG_TIMEOUT 2      /* 2 minute default timeout */
 
 /* Addresses to scan */
+static DEFINE_MUTEX(watchdog_mutex);
 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
                                                 I2C_CLIENT_END };
 
@@ -1333,7 +1333,7 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd,
         int val, ret = 0;
         struct w83793_data *data = filp->private_data;
 
-        lock_kernel();
+        mutex_lock(&watchdog_mutex);
         switch (cmd) {
         case WDIOC_GETSUPPORT:
                 if (!nowayout)
@@ -1387,7 +1387,7 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd,
         default:
                 ret = -ENOTTY;
         }
-        unlock_kernel();
+        mutex_unlock(&watchdog_mutex);
         return ret;
 }