1 files changed, 3 insertions, 65 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index a9b399402007..0d6ca7bac6c8 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -201,7 +201,7 @@ int fsync_bdev(struct block_device *bdev)
  * freeze_bdev  --  lock a filesystem and force it into a consistent state
  * @bdev:       blockdevice to lock
  *
- * This takes the block device bd_mount_sem to make sure no new mounts
+ * This takes the block device bd_mount_mutex to make sure no new mounts
  * happen on bdev until thaw_bdev() is called.
  * If a superblock is found on this device, we take the s_umount semaphore
  * on it to make sure nobody unmounts until the snapshot creation is done.
@@ -210,7 +210,7 @@ struct super_block *freeze_bdev(struct block_device *bdev)
 {
         struct super_block *sb;
 
-        down(&bdev->bd_mount_sem);
+        mutex_lock(&bdev->bd_mount_mutex);
         sb = get_super(bdev);
         if (sb && !(sb->s_flags & MS_RDONLY)) {
                 sb->s_frozen = SB_FREEZE_WRITE;
@@ -264,7 +264,7 @@ void thaw_bdev(struct block_device *bdev, struct super_block *sb)
                 drop_super(sb);
         }
 
-        up(&bdev->bd_mount_sem);
+        mutex_unlock(&bdev->bd_mount_mutex);
 }
 EXPORT_SYMBOL(thaw_bdev);
 
@@ -3051,68 +3051,6 @@ asmlinkage long sys_bdflush(int func, long data)
 }
 
 /*
- * Migration function for pages with buffers. This function can only be used
- * if the underlying filesystem guarantees that no other references to "page"
- * exist.
- */
-#ifdef CONFIG_MIGRATION
-int buffer_migrate_page(struct page *newpage, struct page *page)
-{
-        struct address_space *mapping = page->mapping;
-        struct buffer_head *bh, *head;
-        int rc;
-
-        if (!mapping)
-                return -EAGAIN;
-
-        if (!page_has_buffers(page))
-                return migrate_page(newpage, page);
-
-        head = page_buffers(page);
-
-        rc = migrate_page_remove_references(newpage, page, 3);
-        if (rc)
-                return rc;
-
-        bh = head;
-        do {
-                get_bh(bh);
-                lock_buffer(bh);
-                bh = bh->b_this_page;
-
-        } while (bh != head);
-
-        ClearPagePrivate(page);
-        set_page_private(newpage, page_private(page));
-        set_page_private(page, 0);
-        put_page(page);
-        get_page(newpage);
-
-        bh = head;
-        do {
-                set_bh_page(bh, newpage, bh_offset(bh));
-                bh = bh->b_this_page;
-
-        } while (bh != head);
-
-        SetPagePrivate(newpage);
-
-        migrate_page_copy(newpage, page);
-
-        bh = head;
-        do {
-                unlock_buffer(bh);
-                put_bh(bh);
-                bh = bh->b_this_page;
-
-        } while (bh != head);
-
-        return 0;
-}
-EXPORT_SYMBOL(buffer_migrate_page);
-#endif
-
-/*
  * Buffer-head allocation
  */
 static kmem_cache_t *bh_cachep;