Deal with missing exports for hostfs

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

arch/um/include/shared/os.h

@@ -161,6 +161,9 @@ extern int os_stat_filesystem(char *path, long *bsize_out,
 			      long *spare_out);
 extern int os_change_dir(char *dir);
 extern int os_fchange_dir(int fd);
+extern unsigned os_major(unsigned long long dev);
+extern unsigned os_minor(unsigned long long dev);
+extern unsigned long long os_makedev(unsigned major, unsigned minor);
 
 /* start_up.c */
 extern void os_early_checks(void);

arch/um/kernel/ksyms.c

@@ -58,6 +58,9 @@ EXPORT_SYMBOL(os_accept_connection);
 EXPORT_SYMBOL(os_rcv_fd);
 EXPORT_SYMBOL(run_helper);
 EXPORT_SYMBOL(start_thread);
+EXPORT_SYMBOL(os_major);
+EXPORT_SYMBOL(os_minor);
+EXPORT_SYMBOL(os_makedev);
 
 EXPORT_SYMBOL(add_sigio_fd);
 EXPORT_SYMBOL(ignore_sigio_fd);

arch/um/os-Linux/file.c

@@ -561,3 +561,18 @@ int os_lock_file(int fd, int excl)
  out:
 	return err;
 }
+
+unsigned os_major(unsigned long long dev)
+{
+	return major(dev);
+}
+
+unsigned os_minor(unsigned long long dev)
+{
+	return minor(dev);
+}
+
+unsigned long long os_makedev(unsigned major, unsigned minor)
+{
+	return makedev(major, minor);
+}

arch/um/os-Linux/user_syms.c

@@ -103,6 +103,10 @@ EXPORT_SYMBOL_PROTO(getuid);
 EXPORT_SYMBOL_PROTO(fsync);
 EXPORT_SYMBOL_PROTO(fdatasync);
 
+EXPORT_SYMBOL_PROTO(lstat64);
+EXPORT_SYMBOL_PROTO(fstat64);
+EXPORT_SYMBOL_PROTO(mknod);
+
 /* Export symbols used by GCC for the stack protector. */
 extern void __stack_smash_handler(void *) __attribute__((weak));
 EXPORT_SYMBOL(__stack_smash_handler);

fs/hostfs/hostfs_user.c

@@ -76,9 +76,9 @@ int file_type(const char *path, int *maj, int *min)
 	 * about its definition.
 	 */
 	if (maj != NULL)
-		*maj = major(buf.st_rdev);
+		*maj = os_major(buf.st_rdev);
 	if (min != NULL)
-		*min = minor(buf.st_rdev);
+		*min = os_minor(buf.st_rdev);
 
 	if (S_ISDIR(buf.st_mode))
 		return OS_TYPE_DIR;
@@ -361,7 +361,7 @@ int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
 {
 	int err;
 
-	err = mknod(file, mode, makedev(major, minor));
+	err = mknod(file, mode, os_makedev(major, minor));
 	if (err)
 		return -errno;
 	return 0;