[SMBFS]: Create OLD_TO_NEW_foo macros in highuid.h and use

them instead of direct references to low2highfoo.

fs/smbfs/inode.c

@@ -551,8 +551,8 @@ int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
 	if (ver == SMB_MOUNT_OLDVERSION) {
 		mnt->version = oldmnt->version;
 
-		mnt->uid = low2highuid(oldmnt->uid);
-		mnt->gid = low2highuid(oldmnt->gid);
+		mnt->uid = OLD_TO_NEW_UID(oldmnt->uid);
+		mnt->gid = OLD_TO_NEW_GID(oldmnt->gid);
 
 		mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
 		mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;

include/linux/highuid.h

@@ -56,6 +56,8 @@ extern int overflowgid;
 #define SET_GID16(var, gid)	var = high2lowgid(gid)
 #define NEW_TO_OLD_UID(uid)	high2lowuid(uid)
 #define NEW_TO_OLD_GID(gid)	high2lowgid(gid)
+#define OLD_TO_NEW_UID(uid)	low2highuid(uid)
+#define OLD_TO_NEW_GID(gid)	low2highgid(gid)
 
 /* specific to fs/stat.c */
 #define SET_OLDSTAT_UID(stat, uid)	(stat).st_uid = high2lowuid(uid)
@@ -69,6 +71,8 @@ extern int overflowgid;
 #define SET_GID16(var, gid)	do { ; } while (0)
 #define NEW_TO_OLD_UID(uid)	(uid)
 #define NEW_TO_OLD_GID(gid)	(gid)
+#define OLD_TO_NEW_UID(uid)	(uid)
+#define OLD_TO_NEW_GID(gid)	(gid)
 
 #define SET_OLDSTAT_UID(stat, uid)	(stat).st_uid = (uid)
 #define SET_OLDSTAT_GID(stat, gid)	(stat).st_gid = (gid)