android-5.4/ANDROID-fs-Restore-vfs_path_lookup-export.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alistair Delva <adelva@google.com>
Date: Mon, 19 Nov 2018 22:38:23 -0800
Subject: ANDROID: fs: Restore vfs_path_lookup() export

Partial revert of 197df04c749a ("rename user_path_umountat() to
user_path_mountpoint_at()"), to restore access to vfs_path_lookup()
without including fs/internal.h, as needed by sdcardfs.

Test: HiKey/X15 + Pie + android-mainline,
      and HiKey + AOSP Maser + android-mainline,
      directories under /sdcard created,
      output of mount is right,
      CTS test collecting device infor works

Change-Id: I757f2df9f4dcc66f633939e7833e6fa2ac0ff4f8
Signed-off-by: Alistair Delva <adelva@google.com>
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
---
 fs/internal.h         | 2 --
 include/linux/namei.h | 2 ++
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/internal.h b/fs/internal.h
index 315fcd8d237c..df6e4c4584f3 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -62,8 +62,6 @@ extern int finish_clean_context(struct fs_context *fc);
 extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
 			   struct path *path, struct path *root);
 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
-extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
-			   const char *, unsigned int, struct path *);
 long do_mknodat(int dfd, const char __user *filename, umode_t mode,
 		unsigned int dev);
 long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
diff --git a/include/linux/namei.h b/include/linux/namei.h
index cb288d62f1d6..5f04b40747b2 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -55,6 +55,8 @@ extern struct dentry *kern_path_create(int, const char *, struct path *, unsigne
 extern struct dentry *user_path_create(int, const char __user *, struct path *, unsigned int);
 extern void done_path_create(struct path *, struct dentry *);
 extern struct dentry *kern_path_locked(const char *, struct path *);
+extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
+			   const char *, unsigned int, struct path *);
 extern int kern_path_mountpoint(int, const char *, struct path *, unsigned int);
 
 extern struct dentry *try_lookup_one_len(const char *, struct dentry *, int);