[PATCH 04/11] fs/ntfs3: Optimization in ntfs_set_state()

[Konstantin Komarov]

The current volume flags are updated only if VOLUME_FLAG_DIRTY has been 
changed.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
---
 fs/ntfs3/fsntfs.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
index 342938704cfd..d888ba14237f 100644
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -925,6 +925,7 @@ int ntfs_set_state(struct ntfs_sb_info *sbi, enum 
NTFS_DIRTY_FLAGS dirty)
     struct VOLUME_INFO *info;
     struct mft_inode *mi;
     struct ntfs_inode *ni;
+    __le16 info_flags;

     /*
      * Do not change state if fs was real_dirty.
@@ -957,6 +958,8 @@ int ntfs_set_state(struct ntfs_sb_info *sbi, enum 
NTFS_DIRTY_FLAGS dirty)
         goto out;
     }

+    info_flags = info->flags;
+
     switch (dirty) {
     case NTFS_DIRTY_ERROR:
         ntfs_notice(sbi->sb, "Mark volume as dirty due to NTFS errors");
@@ -970,8 +973,10 @@ int ntfs_set_state(struct ntfs_sb_info *sbi, enum 
NTFS_DIRTY_FLAGS dirty)
         break;
     }
     /* Cache current volume flags. */
-    sbi->volume.flags = info->flags;
-    mi->dirty = true;
+    if (info_flags != info->flags) {
+        sbi->volume.flags = info->flags;
+        mi->dirty = true;
+    }
     err = 0;

 out:
--
2.34.1