writeback: fix ntfs with sb_has_dirty_inodes()

NTFS's if-condition on dirty inodes is not complete.  Fix it with
sb_has_dirty_inodes().

Cc: Anton Altaparmakov <aia21@cantab.net>
Cc: Ken Chen <kenchen@google.com>
Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 1f22fb5..414df43 100644 (file)
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -199,6 +199,14 @@ static void queue_io(struct super_block *sb,
        move_expired_inodes(&sb->s_dirty, &sb->s_io, older_than_this);
 }
 
+int sb_has_dirty_inodes(struct super_block *sb)
+{
+       return !list_empty(&sb->s_dirty) ||
+              !list_empty(&sb->s_io) ||
+              !list_empty(&sb->s_more_io);
+}
+EXPORT_SYMBOL(sb_has_dirty_inodes);
+
 /*
  * Write a single inode's dirty pages and inode data out to disk.
  * If `wait' is set, wait on the writeout.
@@ -497,7 +505,7 @@ writeback_inodes(struct writeback_control *wbc)
 restart:
        sb = sb_entry(super_blocks.prev);
        for (; sb != sb_entry(&super_blocks); sb = sb_entry(sb->s_list.prev)) {
-               if (!list_empty(&sb->s_dirty) || !list_empty(&sb->s_io)) {
+               if (sb_has_dirty_inodes(sb)) {
                        /* we're making our own get_super here */
                        sb->s_count++;
                        spin_unlock(&sb_lock);

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index ad21245..3e76f3b 100644 (file)
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2381,14 +2381,14 @@ static void ntfs_put_super(struct super_block *sb)
         */
        ntfs_commit_inode(vol->mft_ino);
        write_inode_now(vol->mft_ino, 1);
-       if (!list_empty(&sb->s_dirty)) {
+       if (sb_has_dirty_inodes(sb)) {
                const char *s1, *s2;
 
                mutex_lock(&vol->mft_ino->i_mutex);
                truncate_inode_pages(vol->mft_ino->i_mapping, 0);
                mutex_unlock(&vol->mft_ino->i_mutex);
                write_inode_now(vol->mft_ino, 1);
-               if (!list_empty(&sb->s_dirty)) {
+               if (sb_has_dirty_inodes(sb)) {
                        static const char *_s1 = "inodes";
                        static const char *_s2 = "";
                        s1 = _s1;

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0b38a89..b70331f 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1729,6 +1729,7 @@ extern int bdev_read_only(struct block_device *);
 extern int set_blocksize(struct block_device *, int);
 extern int sb_set_blocksize(struct super_block *, int);
 extern int sb_min_blocksize(struct super_block *, int);
+extern int sb_has_dirty_inodes(struct super_block *);
 
 extern int generic_file_mmap(struct file *, struct vm_area_struct *);
 extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);