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SubjectRe: [PATCH] powerpc/64s: Only set HAVE_ARCH_UNMAPPED_AREA when CONFIG_PPC_64S_HASH_MMU is set
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On 24/05/2022, 07:42:05, Christophe Leroy wrote:
> When CONFIG_PPC_64S_HASH_MMU is not set, slice.c is not built and
> arch_get_unmapped_area() and arch_get_unmapped_area_topdown() are
> not provided because RADIX uses the generic ones.
>
> Therefore, neither set HAVE_ARCH_UNMAPPED_AREA nor
> HAVE_ARCH_UNMAPPED_AREA_TOPDOWN.
>
> Reported-by: Laurent Dufour <ldufour@linux.ibm.com>
> Fixes: ab57bd7570d4 ("powerpc/mm: Move get_unmapped_area functions to slice.c")
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
>

FWIW,
Tested-by: Laurent Dufour <ldufour@linux.ibm.com>

---
> arch/powerpc/include/asm/book3s/64/slice.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/book3s/64/slice.h b/arch/powerpc/include/asm/book3s/64/slice.h
> index b8eb4ad271b9..5fbe18544cbd 100644
> --- a/arch/powerpc/include/asm/book3s/64/slice.h
> +++ b/arch/powerpc/include/asm/book3s/64/slice.h
> @@ -4,11 +4,13 @@
>
> #ifndef __ASSEMBLY__
>
> +#ifdef CONFIG_PPC_64S_HASH_MMU
> #ifdef CONFIG_HUGETLB_PAGE
> #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
> #endif
> #define HAVE_ARCH_UNMAPPED_AREA
> #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
> +#endif
>
> #define SLICE_LOW_SHIFT 28
> #define SLICE_LOW_TOP (0x100000000ul)

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