nfs: make nfs_path() work without vfsmount

part 3: now we have everything to get nfs_path() just by dentry -
just follow to (disconnected) root and pick the rest of the thing
there.

Start killing propagation of struct vfsmount * on the paths that
used to bring it to nfs_path().

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

1 files changed, 4 insertions, 5 deletions

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 1d81032b226a..a6ab483c9ad0 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2771,16 +2771,15 @@ static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type,
         return root_mnt;
 }
 
-static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt)
+static void nfs_fix_devname(struct dentry *dentry, struct vfsmount *mnt)
 {
         char *page = (char *) __get_free_page(GFP_KERNEL);
         char *devname, *tmp;
+        char *dummy;
 
         if (page == NULL)
                 return;
-        devname = nfs_path(path->mnt->mnt_devname,
-                        path->mnt->mnt_root, path->dentry,
-                        page, PAGE_SIZE);
+        devname = nfs_path(&dummy, dentry, page, PAGE_SIZE);
         if (IS_ERR(devname))
                 goto out_freepage;
         tmp = kstrdup(devname, GFP_KERNEL);
@@ -2894,7 +2893,7 @@ static int nfs_follow_remote_path(struct vfsmount *root_mnt,
         mnt_target->mnt_root = dget(nd->path.dentry);
 
         /* Correct the device pathname */
-        nfs_fix_devname(&nd->path, mnt_target);
+        nfs_fix_devname(nd->path.dentry, mnt_target);
 
         path_put(&nd->path);
         kfree(nd);