1 files changed, 14 insertions, 2 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f016707597a7..012c4251397e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -576,6 +576,11 @@ static void ext4_put_super(struct super_block *sb)
         struct ext4_super_block *es = sbi->s_es;
         int i, err;
 
+        lock_super(sb);
+        lock_kernel();
+        if (sb->s_dirt)
+                ext4_commit_super(sb, 1);
+
         ext4_release_system_zone(sb);
         ext4_mb_release(sb);
         ext4_ext_release(sb);
@@ -642,8 +647,6 @@ static void ext4_put_super(struct super_block *sb)
         unlock_super(sb);
         kobject_put(&sbi->s_kobj);
         wait_for_completion(&sbi->s_kobj_unregister);
-        lock_super(sb);
-        lock_kernel();
         kfree(sbi->s_blockgroup_lock);
         kfree(sbi);
 }
@@ -3333,7 +3336,9 @@ int ext4_force_commit(struct super_block *sb)
 
 static void ext4_write_super(struct super_block *sb)
 {
+        lock_super(sb);
         ext4_commit_super(sb, 1);
+        unlock_super(sb);
 }
 
 static int ext4_sync_fs(struct super_block *sb, int wait)
@@ -3417,7 +3422,10 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
         int i;
 #endif
 
+        lock_kernel();
+
         /* Store the original options */
+        lock_super(sb);
         old_sb_flags = sb->s_flags;
         old_opts.s_mount_opt = sbi->s_mount_opt;
         old_opts.s_resuid = sbi->s_resuid;
@@ -3551,6 +3559,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
                     old_opts.s_qf_names[i] != sbi->s_qf_names[i])
                         kfree(old_opts.s_qf_names[i]);
 #endif
+        unlock_super(sb);
+        unlock_kernel();
         return 0;
 
 restore_opts:
@@ -3570,6 +3580,8 @@ restore_opts:
                 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
         }
 #endif
+        unlock_super(sb);
+        unlock_kernel();
         return err;
 }