From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 23 Mar 2010 00:23:25 +0000 (-0400)
Subject: In get_super() and user_get_super() restarts are unconditional
X-Git-Tag: v3.0~4890^2~53
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=df40c01a9249873e4ad0625ae5d9fb831962b75c;p=platform%2Fkernel%2Flinux-amlogic.git

In get_super() and user_get_super() restarts are unconditional

If superblock had been still alive, we would've returned it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/super.c b/fs/super.c
index 44971d7..1f72e0d 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -425,7 +425,7 @@ void sync_supers(void)
  *	mounted on the device given. %NULL is returned if no match is found.
  */
 
-struct super_block * get_super(struct block_device *bdev)
+struct super_block *get_super(struct block_device *bdev)
 {
 	struct super_block *sb;
 
@@ -441,13 +441,14 @@ rescan:
 			sb->s_count++;
 			spin_unlock(&sb_lock);
 			down_read(&sb->s_umount);
+			/* still alive? */
 			if (sb->s_root)
 				return sb;
 			up_read(&sb->s_umount);
-			/* restart only when sb is no longer on the list */
+			/* nope, got unmounted */
 			spin_lock(&sb_lock);
-			if (__put_super_and_need_restart(sb))
-				goto rescan;
+			__put_super(sb);
+			goto rescan;
 		}
 	}
 	spin_unlock(&sb_lock);
@@ -487,7 +488,7 @@ restart:
 	return NULL;
 }
  
-struct super_block * user_get_super(dev_t dev)
+struct super_block *user_get_super(dev_t dev)
 {
 	struct super_block *sb;
 
@@ -500,13 +501,14 @@ rescan:
 			sb->s_count++;
 			spin_unlock(&sb_lock);
 			down_read(&sb->s_umount);
+			/* still alive? */
 			if (sb->s_root)
 				return sb;
 			up_read(&sb->s_umount);
-			/* restart only when sb is no longer on the list */
+			/* nope, got unmounted */
 			spin_lock(&sb_lock);
-			if (__put_super_and_need_restart(sb))
-				goto rescan;
+			__put_super(sb);
+			goto rescan;
 		}
 	}
 	spin_unlock(&sb_lock);