Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (52 commits)
  init: Open /dev/console from rootfs
  mqueue: fix typo "failues" -> "failures"
  mqueue: only set error codes if they are really necessary
  mqueue: simplify do_open() error handling
  mqueue: apply mathematics distributivity on mq_bytes calculation
  mqueue: remove unneeded info->messages initialization
  mqueue: fix mq_open() file descriptor leak on user-space processes
  fix race in d_splice_alias()
  set S_DEAD on unlink() and non-directory rename() victims
  vfs: add NOFOLLOW flag to umount(2)
  get rid of ->mnt_parent in tomoyo/realpath
  hppfs can use existing proc_mnt, no need for do_kern_mount() in there
  Mirror MS_KERNMOUNT in ->mnt_flags
  get rid of useless vfsmount_lock use in put_mnt_ns()
  Take vfsmount_lock to fs/internal.h
  get rid of insanity with namespace roots in tomoyo
  take check for new events in namespace (guts of mounts_poll()) to namespace.c
  Don't mess with generic_permission() under ->d_lock in hpfs
  sanitize const/signedness for udf
  nilfs: sanitize const/signedness in dealing with ->d_name.name
  ...

Fix up fairly trivial (famous last words...) conflicts in
drivers/infiniband/core/uverbs_main.c and security/tomoyo/realpath.c

2 files changed, 5 insertions, 20 deletions

diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index a5721b373f53..5225e668dbf0 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -387,7 +387,7 @@ static int smack_sb_umount(struct vfsmount *mnt, int flags)
         struct smk_audit_info ad;
 
         smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
-        smk_ad_setfield_u_fs_path_dentry(&ad, mnt->mnt_mountpoint);
+        smk_ad_setfield_u_fs_path_dentry(&ad, mnt->mnt_root);
         smk_ad_setfield_u_fs_path_mnt(&ad, mnt);
 
         sbp = mnt->mnt_sb->s_security;
diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
index c00df45c7ede..cf7d61f781b9 100644
--- a/security/tomoyo/realpath.c
+++ b/security/tomoyo/realpath.c
@@ -88,29 +88,14 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname,
                 sp = dentry->d_op->d_dname(dentry, newname + offset,
                                            newname_len - offset);
         } else {
-                /* Taken from d_namespace_path(). */
-                struct path root;
-                struct path ns_root = { };
-                struct path tmp;
+                struct path ns_root = {.mnt = NULL, .dentry = NULL};
 
-                read_lock(&current->fs->lock);
-                root = current->fs->root;
-                path_get(&root);
-                read_unlock(&current->fs->lock);
-                spin_lock(&vfsmount_lock);
-                if (root.mnt && root.mnt->mnt_ns)
-                        ns_root.mnt = mntget(root.mnt->mnt_ns->root);
-                if (ns_root.mnt)
-                        ns_root.dentry = dget(ns_root.mnt->mnt_root);
-                spin_unlock(&vfsmount_lock);
                 spin_lock(&dcache_lock);
-                tmp = ns_root;
-                sp = __d_path(path, &tmp, newname, newname_len);
+                /* go to whatever namespace root we are under */
+                sp = __d_path(path, &ns_root, newname, newname_len);
                 spin_unlock(&dcache_lock);
-                path_put(&root);
-                path_put(&ns_root);
                 /* Prepend "/proc" prefix if using internal proc vfs mount. */
-                if (!IS_ERR(sp) && (path->mnt->mnt_parent == path->mnt) &&
+                if (!IS_ERR(sp) && (path->mnt->mnt_flags & MNT_INTERNAL) &&
                     (path->mnt->mnt_sb->s_magic == PROC_SUPER_MAGIC)) {
                         sp -= 5;
                         if (sp >= newname)