Re: [PATCH 07/10] sparc64: Fix top-level fault handling bugs.

[David Miller <davem@xxxxxxxxxxxxx>]

From: Meelis Roos <mroos@xxxxx>
Date: Fri, 2 May 2014 07:51:13 +0300 (EEST)

>> Make get_user_insn() able to cope with huge PMDs.
>> 
>> Next, make do_fault_siginfo() more robust when get_user_insn() can't
>> actually fetch the instruction.  In particular, use the MMU announced
>> fault address when that happens, instead of calling
>> compute_effective_address() and computing garbage.
>> 
>> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
> 
> This patch happens to introduce a compile failure on a computer that has 
> THP diabled:
> 
>   CC      arch/sparc/mm/fault_64.o
> arch/sparc/mm/fault_64.c: In function ʽget_user_insnʼ:
> arch/sparc/mm/fault_64.c:117:3: error: implicit declaration of function ʽpmd_pfnʼ [-Werror=implicit-function-declaration]
> 
> arch/sparc/include/asm/pgtable_64.h has pmd_pfn declared only for THP.

Thanks a lot, I'll fix this by adding the appropriate ifdef around
that code.
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