From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 4 Oct 2013 21:06:56 +0000 (-0400)
Subject: make freeing super_block rcu-delayed
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e2fec7c35582e7bb41cccc1761faa2af4dc17627;p=linux-beck.git

make freeing super_block rcu-delayed

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

diff --git a/fs/super.c b/fs/super.c
index efa6e488a95c..743bb7118053 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -149,7 +149,7 @@ static void destroy_super(struct super_block *s)
 	WARN_ON(!list_empty(&s->s_mounts));
 	kfree(s->s_subtype);
 	kfree(s->s_options);
-	kfree(s);
+	kfree_rcu(s, rcu);
 }
 
 /**
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b09e4e1d747a..2ab8a67ee054 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1330,6 +1330,7 @@ struct super_block {
 	 */
 	struct list_lru		s_dentry_lru ____cacheline_aligned_in_smp;
 	struct list_lru		s_inode_lru ____cacheline_aligned_in_smp;
+	struct rcu_head		rcu;
 };
 
 extern struct timespec current_fs_time(struct super_block *sb);