exfat: remove EXFAT_SB_DIRTY flag

This flag is set/reset in exfat_put_super()/exfat_sync_fs()
to avoid sync_blockdev().
- exfat_put_super():
Before calling this, the VFS has already called sync_filesystem(),
so sync is never performed here.
- exfat_sync_fs():
After calling this, the VFS calls sync_blockdev(), so, it is meaningless
to check EXFAT_SB_DIRTY or to bypass sync_blockdev() here.

Remove the EXFAT_SB_DIRTY check to ensure synchronization.
And remove the code related to the flag.

Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>

1 files changed, 6 insertions, 8 deletions

diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index 253a92460d52..b5bf6dedbe11 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -45,9 +45,6 @@ static void exfat_put_super(struct super_block *sb)
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 
 	mutex_lock(&sbi->s_lock);
-	if (test_and_clear_bit(EXFAT_SB_DIRTY, &sbi->s_state))
-		sync_blockdev(sb->s_bdev);
-	exfat_set_vol_flags(sb, VOL_CLEAN);
 	exfat_free_bitmap(sbi);
 	brelse(sbi->boot_bh);
 	mutex_unlock(&sbi->s_lock);
@@ -60,13 +57,14 @@ static int exfat_sync_fs(struct super_block *sb, int wait)
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	int err = 0;
 
+	if (!wait)
+		return 0;
+
 	/* If there are some dirty buffers in the bdev inode */
 	mutex_lock(&sbi->s_lock);
-	if (test_and_clear_bit(EXFAT_SB_DIRTY, &sbi->s_state)) {
-		sync_blockdev(sb->s_bdev);
-		if (exfat_set_vol_flags(sb, VOL_CLEAN))
-			err = -EIO;
-	}
+	sync_blockdev(sb->s_bdev);
+	if (exfat_set_vol_flags(sb, VOL_CLEAN))
+		err = -EIO;
 	mutex_unlock(&sbi->s_lock);
 	return err;
 }