1 files changed, 4 insertions, 5 deletions

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 892643dc9af1..c403b66ec83c 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -22,8 +22,7 @@
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
 #include <linux/buffer_head.h>
-
-extern struct super_block *blockdev_superblock;
+#include "internal.h"
 
 /**
  *      __mark_inode_dirty -    internal function
@@ -320,7 +319,7 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
 
                 if (!bdi_cap_writeback_dirty(bdi)) {
                         list_move(&inode->i_list, &sb->s_dirty);
-                        if (sb == blockdev_superblock) {
+                        if (sb_is_blkdev_sb(sb)) {
                                 /*
                                  * Dirty memory-backed blockdev: the ramdisk
                                  * driver does this.  Skip just this inode
@@ -337,14 +336,14 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
 
                 if (wbc->nonblocking && bdi_write_congested(bdi)) {
                         wbc->encountered_congestion = 1;
-                        if (sb != blockdev_superblock)
+                        if (!sb_is_blkdev_sb(sb))
                                 break;          /* Skip a congested fs */
                         list_move(&inode->i_list, &sb->s_dirty);
                         continue;               /* Skip a congested blockdev */
                 }
 
                 if (wbc->bdi && bdi != wbc->bdi) {
-                        if (sb != blockdev_superblock)
+                        if (!sb_is_blkdev_sb(sb))
                                 break;          /* fs has the wrong queue */
                         list_move(&inode->i_list, &sb->s_dirty);
                         continue;               /* blockdev has wrong queue */