--- /dev/null
+--- a/include/linux/msdos_fs.h
++++ b/include/linux/msdos_fs.h
+@@ -57,11 +57,13 @@
+ #define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */
+ #define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */
+
++#ifdef __KERNEL__
+ /* media of boot sector */
+ static inline int fat_valid_media(u8 media)
+ {
+ return 0xf8 <= media || media == 0xf0;
+ }
++#endif
+
+ #define FAT_FIRST_ENT(s, x) ((MSDOS_SB(s)->fat_bits == 32 ? 0x0FFFFF00 : \
+ MSDOS_SB(s)->fat_bits == 16 ? 0xFF00 : 0xF00) | (x))