sysfs/file.c - use mutex instead of semaphore

Use mutex instead of semaphore in sysfs/file.c : sys_buffer.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 7 deletions

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 3e1cc062a740..b21d11b46754 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -8,8 +8,8 @@
 #include <linux/namei.h>
 #include <linux/poll.h>
 #include <linux/list.h>
+#include <linux/mutex.h>
 #include <asm/uaccess.h>
-#include <asm/semaphore.h>
 
 #include "sysfs.h"
 
@@ -55,7 +55,7 @@ struct sysfs_buffer {
         loff_t                  pos;
         char                    * page;
         struct sysfs_ops        * ops;
-        struct semaphore        sem;
+        struct mutex            mutex;
         int                     needs_read_fill;
         int                     event;
 };
@@ -128,7 +128,7 @@ sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
         struct sysfs_buffer * buffer = file->private_data;
         ssize_t retval = 0;
 
-        down(&buffer->sem);
+        mutex_lock(&buffer->mutex);
         if (buffer->needs_read_fill) {
                 retval = fill_read_buffer(file->f_path.dentry,buffer);
                 if (retval)
@@ -139,7 +139,7 @@ sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
         retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
                                          buffer->count);
 out:
-        up(&buffer->sem);
+        mutex_unlock(&buffer->mutex);
         return retval;
 }
 
@@ -228,13 +228,13 @@ sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t
         struct sysfs_buffer * buffer = file->private_data;
         ssize_t len;
 
-        down(&buffer->sem);
+        mutex_lock(&buffer->mutex);
         len = fill_write_buffer(buffer, buf, count);
         if (len > 0)
                 len = flush_write_buffer(file->f_path.dentry, buffer, len);
         if (len > 0)
                 *ppos += len;
-        up(&buffer->sem);
+        mutex_unlock(&buffer->mutex);
         return len;
 }
 
@@ -294,7 +294,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
         if (!buffer)
                 goto err_out;
 
-        init_MUTEX(&buffer->sem);
+        mutex_init(&buffer->mutex);
         buffer->needs_read_fill = 1;
         buffer->ops = ops;
         file->private_data = buffer;