[PATCH v3] powerpc/mm: fix undefined reference to `.__kernel_map_pages' on FSL PPC64

[Joonsoo Kim]

2015-01-28 10:01 GMT+09:00 Michael Ellerman <mpe at ellerman.id.au>:
> On Mon, 2015-01-26 at 13:22 -0600, Kim Phillips wrote:
>> arch/powerpc has __kernel_map_pages implementations in mm/pgtable_32.c, and
>> mm/hash_utils_64.c, of which the former is built for PPC32, and the latter
>> for PPC64 machines with PPC_STD_MMU.  Fix arch/powerpc/Kconfig to not select
>> ARCH_SUPPORTS_DEBUG_PAGEALLOC when CONFIG_PPC_STD_MMU_64 isn't defined,
>> i.e., for 64-bit book3e builds to use the generic __kernel_map_pages()
>> in mm/debug-pagealloc.c.
>>
>>   LD      init/built-in.o
>> mm/built-in.o: In function `kernel_map_pages':
>> include/linux/mm.h:2076: undefined reference to `.__kernel_map_pages'
>> include/linux/mm.h:2076: undefined reference to `.__kernel_map_pages'
>> include/linux/mm.h:2076: undefined reference to `.__kernel_map_pages'
>> Makefile:925: recipe for target 'vmlinux' failed
>> make: *** [vmlinux] Error 1
>>
>> Signed-off-by: Kim Phillips <kim.phillips at freescale.com>
>> ---
>> v3:
>> - fix wording for hash_utils_64.c implementation pointed out by
>> Michael Ellerman
>> - changed designation from 'mm:' to 'powerpc/mm:', as I think this
>> now belongs in ppc-land
>>
>> v2:
>> - corrected SUPPORTS_DEBUG_PAGEALLOC selection to enable
>> non-STD_MMU_64 builds to use the generic __kernel_map_pages().
>
> I'd be happy to take this through the powerpc tree for 3.20, but for this:
>
>> depends on:
>> From: Joonsoo Kim <iamjoonsoo.kim at lge.com>
>> Date: Thu, 22 Jan 2015 10:28:58 +0900
>> Subject: [PATCH] mm/debug_pagealloc: fix build failure on ppc and some other archs
>
> I don't have that patch in my tree.
>
> But in what way does this patch depend on that one?
>
> It looks to me like it'd be safe to take this on its own, or am I wrong?
>

Hello,

These two patches are merged to Andrew's tree now.

Thanks.