On Thu, May 15, 2014 at 03:19:22PM +0100, Mark Salter wrote:
> diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
> index 5e9aec3..9bed38f 100644
> --- a/arch/arm64/mm/hugetlbpage.c
> +++ b/arch/arm64/mm/hugetlbpage.c
> @@ -51,7 +51,11 @@ int pmd_huge(pmd_t pmd)
>
> int pud_huge(pud_t pud)
> {
> +#ifndef __PAGETABLE_PMD_FOLDED
> return !(pud_val(pud) & PUD_TABLE_BIT);
> +#else
> + return 0;
> +#endif
> }
>
> int pmd_huge_support(void)
> @@ -64,8 +68,10 @@ static __init int setup_hugepagesz(char *opt)
> unsigned long ps = memparse(opt, &opt);
> if (ps == PMD_SIZE) {
> hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
> +#ifndef __PAGETABLE_PMD_FOLDED
> } else if (ps == PUD_SIZE) {
> hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
> +#endif
Since PMD_SIZE == PUD_SIZE when __PAGETABLE_PMD_FOLDED, do we need the
#ifndef here? Maybe the compiler is smart enough to remove it but it's
not on a critical path anyway, so I wouldn't bother.
--
Catalin
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