1 files changed, 8 insertions, 7 deletions

diff --git a/drivers/sbus/char/flash.c b/drivers/sbus/char/flash.c
index 368d66294d83..ed9494e18859 100644
--- a/drivers/sbus/char/flash.c
+++ b/drivers/sbus/char/flash.c
@@ -10,7 +10,7 @@
 #include <linux/fcntl.h>
 #include <linux/poll.h>
 #include <linux/init.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <linux/spinlock.h>
 #include <linux/mm.h>
 #include <linux/of.h>
@@ -22,6 +22,7 @@
 #include <asm/io.h>
 #include <asm/upa.h>
 
+static DEFINE_MUTEX(flash_mutex);
 static DEFINE_SPINLOCK(flash_lock);
 static struct {
         unsigned long read_base;        /* Physical read address */
@@ -80,7 +81,7 @@ flash_mmap(struct file *file, struct vm_area_struct *vma)
 static long long
 flash_llseek(struct file *file, long long offset, int origin)
 {
-        lock_kernel();
+        mutex_lock(&flash_mutex);
         switch (origin) {
                 case 0:
                         file->f_pos = offset;
@@ -94,10 +95,10 @@ flash_llseek(struct file *file, long long offset, int origin)
                         file->f_pos = flash.read_size;
                         break;
                 default:
-                        unlock_kernel();
+                        mutex_unlock(&flash_mutex);
                         return -EINVAL;
         }
-        unlock_kernel();
+        mutex_unlock(&flash_mutex);
         return file->f_pos;
 }
 
@@ -125,13 +126,13 @@ flash_read(struct file * file, char __user * buf,
 static int
 flash_open(struct inode *inode, struct file *file)
 {
-        lock_kernel();
+        mutex_lock(&flash_mutex);
         if (test_and_set_bit(0, (void *)&flash.busy) != 0) {
-                unlock_kernel();
+                mutex_unlock(&flash_mutex);
                 return -EBUSY;
         }
 
-        unlock_kernel();
+        mutex_unlock(&flash_mutex);
         return 0;
 }