vfs: now it can be done - make mnt_parent point to struct mount
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index 89248bf..2e9110a 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -677,36 +677,38 @@
static int follow_up_rcu(struct path *path)
{
- struct vfsmount *parent;
+ struct mount *mnt = real_mount(path->mnt);
+ struct mount *parent;
struct dentry *mountpoint;
- parent = real_mount(path->mnt)->mnt_parent;
- if (parent == path->mnt)
+ parent = mnt->mnt_parent;
+ if (&parent->mnt == path->mnt)
return 0;
- mountpoint = path->mnt->mnt_mountpoint;
+ mountpoint = mnt->mnt.mnt_mountpoint;
path->dentry = mountpoint;
- path->mnt = parent;
+ path->mnt = &parent->mnt;
return 1;
}
int follow_up(struct path *path)
{
- struct vfsmount *parent;
+ struct mount *mnt = real_mount(path->mnt);
+ struct mount *parent;
struct dentry *mountpoint;
br_read_lock(vfsmount_lock);
- parent = real_mount(path->mnt)->mnt_parent;
- if (parent == path->mnt) {
+ parent = mnt->mnt_parent;
+ if (&parent->mnt == path->mnt) {
br_read_unlock(vfsmount_lock);
return 0;
}
- mntget(parent);
- mountpoint = dget(path->mnt->mnt_mountpoint);
+ mntget(&parent->mnt);
+ mountpoint = dget(mnt->mnt.mnt_mountpoint);
br_read_unlock(vfsmount_lock);
dput(path->dentry);
path->dentry = mountpoint;
mntput(path->mnt);
- path->mnt = parent;
+ path->mnt = &parent->mnt;
return 1;
}