Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull  more VFS bits from Al Viro:
 "Unfortunately, it looks like xattr series will have to wait until the
  next cycle ;-/

  This pile contains 9p cleanups and fixes (races in v9fs_fid_add()
  etc), fixup for nommu breakage in shmem.c, several cleanups and a bit
  more file_inode() work"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  constify path_get/path_put and fs_struct.c stuff
  fix nommu breakage in shmem.c
  cache the value of file_inode() in struct file
  9p: if v9fs_fid_lookup() gets to asking server, it'd better have hashed dentry
  9p: make sure ->lookup() adds fid to the right dentry
  9p: untangle ->lookup() a bit
  9p: double iput() in ->lookup() if d_materialise_unique() fails
  9p: v9fs_fid_add() can't fail now
  v9fs: get rid of v9fs_dentry
  9p: turn fid->dlist into hlist
  9p: don't bother with private lock in ->d_fsdata; dentry->d_lock will do just fine
  more file_inode() open-coded instances
  selinux: opened file can't have NULL or negative ->f_path.dentry

(In the meantime, the hlist traversal macros have changed, so this
required a semantic conflict fixup for the newly hlistified fid->dlist)

diff --cc fs/9p/fid.c
index afd4724,616abaf..d51ec9f
--- 1/fs/9p/fid.c
--- 2/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@@ -82,11 -68,13 +68,12 @@@ static struct p9_fid *v9fs_fid_find(str
        p9_debug(P9_DEBUG_VFS, " dentry: %s (%p) uid %d any %d\n",
                 dentry->d_name.name, dentry, from_kuid(&init_user_ns, uid),
                 any);
-       dent = (struct v9fs_dentry *) dentry->d_fsdata;
        ret = NULL;
-       if (dent) {
-               spin_lock(&dent->lock);
-               list_for_each_entry(fid, &dent->fidlist, dlist) {
+       /* we'll recheck under lock if there's anything to look in */
+       if (dentry->d_fsdata) {
+               struct hlist_head *h = (struct hlist_head *)&dentry->d_fsdata;
 -              struct hlist_node *n;
+               spin_lock(&dentry->d_lock);
 -              hlist_for_each_entry(fid, n, h, dlist) {
++              hlist_for_each_entry(fid, h, dlist) {
                        if (any || uid_eq(fid->uid, uid)) {
                                ret = fid;
                                break;

diff --cc fs/open.c
Simple merge

diff --cc fs/seq_file.c
Simple merge