---

yaml --- r: 200622 b: refs/heads/master c: 29cb485 h: refs/heads/master v: v3
git-mirror · Jun 11, 2010 · 8af0717 · 8af0717
1 parent c2f834d
commit 8af0717
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Showing 2 changed files with 11 additions and 9 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 334132ae921a14ac2b2ba48e174136f7f2c9aae1
+refs/heads/master: 29cb48594b873f6193d6327097e504bd3e2314de
diff --git a/trunk/fs/fs-writeback.c b/trunk/fs/fs-writeback.c
@@ -534,19 +534,21 @@ writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
 static bool pin_sb_for_writeback(struct super_block *sb)
 {
 	spin_lock(&sb_lock);
+	if (list_empty(&sb->s_instances)) {
+		spin_unlock(&sb_lock);
+		return false;
+	}
+
 	sb->s_count++;
+	spin_unlock(&sb_lock);
+
 	if (down_read_trylock(&sb->s_umount)) {
-		if (sb->s_root) {
-			spin_unlock(&sb_lock);
+		if (sb->s_root)
 			return true;
-		}
-		/*
-		 * umounted, drop rwsem again and fall through to failure
-		 */
 		up_read(&sb->s_umount);
 	}
-	sb->s_count--;
-	spin_unlock(&sb_lock);
+
+	put_super(sb);
 	return false;
 }