cfi_interleave undefined build error

For your information; I was building a few randconfig kernels today and ran into this little problem : ... CC [M] drivers/mtd/chips/cfi_probe.o In file included from drivers/mtd/chips/cfi_probe.c:19: include/linux/mtd/cfi.h: In function 'cfi_build_cmd': include/linux/mtd/cfi.h:293: warning:

cfi_interleave undefined build error

For your information; I was building a few randconfig kernels today and ran into this little problem : ... CC [M] drivers/mtd/chips/cfi_probe.o In file included from drivers/mtd/chips/cfi_probe.c:19: include/linux/mtd/cfi.h: In function 'cfi_build_cmd': include/linux/mtd/cfi.h:293: warning: