My aboriginal linux project builds tiny linux systems to run under  
qemu, producing as close to the same system as possible across a bunch  
of different architectures. The above change broke the mips r4k build  
I've been running under qemu.

Here's a toolchain and reproduction sequence:

   wget http://landley.net/aboriginal/bin/cross-compiler-mips.tar.bz2
   tar xvjf cross-compiler-mips.tar.bz2
   export PATH=$PWD/cross-compiler-mips/bin:$PATH
   make ARCH=mips allnoconfig KCONFIG_ALLCONFIG=miniconfig.mips
   make CROSS_COMPILE=mips- ARCH=mips

(The file miniconfig.mips is attached.)

It ends:

   CC      init/version.o
   LD      init/built-in.o
arch/mips/built-in.o: In function `local_r4k_flush_cache_page':
c-r4k.c:(.text+0xe278): undefined reference to `kvm_local_flush_tlb_all'
c-r4k.c:(.text+0xe278): relocation truncated to fit: R_MIPS_26 against  
`kvm_local_flush_tlb_all'
arch/mips/built-in.o: In function `local_flush_tlb_range':
(.text+0xe938): undefined reference to `kvm_local_flush_tlb_all'
arch/mips/built-in.o: In function `local_flush_tlb_range':
(.text+0xe938): relocation truncated to fit: R_MIPS_26 against  
`kvm_local_flush_tlb_all'
arch/mips/built-in.o: In function `local_flush_tlb_mm':
(.text+0xed38): undefined reference to `kvm_local_flush_tlb_all'
arch/mips/built-in.o: In function `local_flush_tlb_mm':
(.text+0xed38): relocation truncated to fit: R_MIPS_26 against  
`kvm_local_flush_tlb_all'
kernel/built-in.o: In function `__schedule':
core.c:(.sched.text+0x16a0): undefined reference to  
`kvm_local_flush_tlb_all'
core.c:(.sched.text+0x16a0): relocation truncated to fit: R_MIPS_26  
against `kvm_local_flush_tlb_all'
mm/built-in.o: In function `use_mm':
(.text+0x182c8): undefined reference to `kvm_local_flush_tlb_all'
mm/built-in.o: In function `use_mm':
(.text+0x182c8): relocation truncated to fit: R_MIPS_26 against  
`kvm_local_flush_tlb_all'
fs/built-in.o:(.text+0x7b50): more undefined references to  
`kvm_local_flush_tlb_all' follow
fs/built-in.o: In function `flush_old_exec':
(.text+0x7b50): relocation truncated to fit: R_MIPS_26 against  
`kvm_local_flush_tlb_all'

Revert the above commit and it builds to the end.

Rob