Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  writeback: always use sb->s_bdi for writeback purposes

1 files changed, 4 insertions, 15 deletions

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 5581122bd2c0..ab38fef1c9a1 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -72,22 +72,11 @@ int writeback_in_progress(struct backing_dev_info *bdi)
 static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
 {
         struct super_block *sb = inode->i_sb;
-        struct backing_dev_info *bdi = inode->i_mapping->backing_dev_info;
 
-        /*
-         * For inodes on standard filesystems, we use superblock's bdi. For
-         * inodes on virtual filesystems, we want to use inode mapping's bdi
-         * because they can possibly point to something useful (think about
-         * block_dev filesystem).
-         */
-        if (sb->s_bdi && sb->s_bdi != &noop_backing_dev_info) {
-                /* Some device inodes could play dirty tricks. Catch them... */
-                WARN(bdi != sb->s_bdi && bdi_cap_writeback_dirty(bdi),
-                        "Dirtiable inode bdi %s != sb bdi %s\n",
-                        bdi->name, sb->s_bdi->name);
-                return sb->s_bdi;
-        }
-        return bdi;
+        if (strcmp(sb->s_type->name, "bdev") == 0)
+                return inode->i_mapping->backing_dev_info;
+
+        return sb->s_bdi;
 }
 
 static void bdi_queue_work(struct backing_dev_info *bdi,