From: David Howells <dhowells@redhat.com>
Date: Fri, 24 Jan 2014 12:17:54 +0000 (+0000)
Subject: VFS: Make delayed_free() call free_vfsmnt()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8ffcb32e05239f0e53abfb0a1bc4eee4855b7fd2;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

VFS: Make delayed_free() call free_vfsmnt()

Make delayed_free() call free_vfsmnt() so that we don't have two functions
doing the same job.  This requires the calls to mnt_free_id() in free_vfsmnt()
to be moved into the callers of that function.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namespace.c b/fs/namespace.c
index 20e8696c31a7..182bc41cd887 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -568,13 +568,17 @@ int sb_prepare_remount_readonly(struct super_block *sb)
 static void free_vfsmnt(struct mount *mnt)
 {
 	kfree(mnt->mnt_devname);
-	mnt_free_id(mnt);
 #ifdef CONFIG_SMP
 	free_percpu(mnt->mnt_pcp);
 #endif
 	kmem_cache_free(mnt_cache, mnt);
 }
 
+static void delayed_free_vfsmnt(struct rcu_head *head)
+{
+	free_vfsmnt(container_of(head, struct mount, mnt_rcu));
+}
+
 /* call under rcu_read_lock */
 bool legitimize_mnt(struct vfsmount *bastard, unsigned seq)
 {
@@ -846,6 +850,7 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
 
 	root = mount_fs(type, flags, name, data);
 	if (IS_ERR(root)) {
+		mnt_free_id(mnt);
 		free_vfsmnt(mnt);
 		return ERR_CAST(root);
 	}
@@ -926,20 +931,11 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
 	return mnt;
 
  out_free:
+	mnt_free_id(mnt);
 	free_vfsmnt(mnt);
 	return ERR_PTR(err);
 }
 
-static void delayed_free(struct rcu_head *head)
-{
-	struct mount *mnt = container_of(head, struct mount, mnt_rcu);
-	kfree(mnt->mnt_devname);
-#ifdef CONFIG_SMP
-	free_percpu(mnt->mnt_pcp);
-#endif
-	kmem_cache_free(mnt_cache, mnt);
-}
-
 static void mntput_no_expire(struct mount *mnt)
 {
 put_again:
@@ -989,7 +985,7 @@ put_again:
 	dput(mnt->mnt.mnt_root);
 	deactivate_super(mnt->mnt.mnt_sb);
 	mnt_free_id(mnt);
-	call_rcu(&mnt->mnt_rcu, delayed_free);
+	call_rcu(&mnt->mnt_rcu, delayed_free_vfsmnt);
 }
 
 void mntput(struct vfsmount *mnt)