2.6.22-rc4 not compiling on the SH4/Dreamcast

[Adrian M. <ad...@ne...>]

This is a patched 2.6.21.5 - which might be an issue. But this is what I
get:

LD      .tmp_vmlinux1
arch/sh/kernel/built-in.o: In function `restore_all':
arch/sh/kernel/cpu/sh4/../sh3/entry.S:(.text+0x50cc): undefined
reference to `in_nmi'
make: *** [.tmp_vmlinux1] Error 1