1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/char/tlclk.c b/drivers/char/tlclk.c
index 80ea6bcfffdc..0c964cdcc223 100644
--- a/drivers/char/tlclk.c
+++ b/drivers/char/tlclk.c
@@ -37,7 +37,7 @@
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <linux/timer.h>
 #include <linux/sysfs.h>
 #include <linux/device.h>
@@ -206,7 +206,7 @@ static int tlclk_open(struct inode *inode, struct file *filp)
 {
        int result;
-        lock_kernel();
+        mutex_lock(&tlclk_mutex);
        if (test_and_set_bit(0, &useflags)) {
                result = -EBUSY;
                /* this legacy device is always one per system and it doesn't
@@ -229,7 +229,7 @@ static int tlclk_open(struct inode *inode, struct file *filp)
                inb(TLCLK_REG6);        /* Clear interrupt events */
 out:
-        unlock_kernel();
+        mutex_unlock(&tlclk_mutex);
        return result;
 }
@@ -267,6 +267,7 @@ static const struct file_operations tlclk_fops = {
        .read = tlclk_read,
        .open = tlclk_open,
        .release = tlclk_release,
+        .llseek = noop_llseek,
 };