d_path: prepend_path(): get rid of vfsmnt

it's kept equal to &mnt->mnt all along.

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

diff --git a/fs/d_path.c b/fs/d_path.c
index 06e93dd031bf59787b0eee218948bd0f87cd61f0..3836f5d0b0238fec4769135df78bf30ecc4829aa 100644 (file)
--- a/fs/d_path.c
+++ b/fs/d_path.c
@@ -90,7 +90,6 @@ static int prepend_path(const struct path *path,
                        struct prepend_buffer *p)
 {
        struct dentry *dentry;
-       struct vfsmount *vfsmnt;
        struct mount *mnt;
        int error = 0;
        unsigned seq, m_seq = 0;
@@ -105,18 +104,17 @@ restart:
        b = *p;
        error = 0;
        dentry = path->dentry;
-       vfsmnt = path->mnt;
-       mnt = real_mount(vfsmnt);
+       mnt = real_mount(path->mnt);
        read_seqbegin_or_lock(&rename_lock, &seq);
-       while (dentry != root->dentry || vfsmnt != root->mnt) {
+       while (dentry != root->dentry || &mnt->mnt != root->mnt) {
                struct dentry * parent;
 
-               if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
+               if (dentry == mnt->mnt.mnt_root || IS_ROOT(dentry)) {
                        struct mount *parent = READ_ONCE(mnt->mnt_parent);
                        struct mnt_namespace *mnt_ns;
 
                        /* Escaped? */
-                       if (dentry != vfsmnt->mnt_root) {
+                       if (dentry != mnt->mnt.mnt_root) {
                                b = *p;
                                error = 3;
                                break;
@@ -125,7 +123,6 @@ restart:
                        if (mnt != parent) {
                                dentry = READ_ONCE(mnt->mnt_mountpoint);
                                mnt = parent;
-                               vfsmnt = &mnt->mnt;
                                continue;
                        }
                        mnt_ns = READ_ONCE(mnt->mnt_ns);