On Mon, May 22, 2017 at 3:36 PM, Punit Agrawal <punit.agrawal@xxxxxxx> wrote:
> diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
> index 99b490b4d05a..3138e126f43b 100644
> --- a/include/asm-generic/hugetlb.h
> +++ b/include/asm-generic/hugetlb.h
> @@ -31,10 +31,7 @@ static inline pte_t huge_pte_modify(pte_t pte, pgprot_t newprot)
> return pte_modify(pte, newprot);
> }
>
> -static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
> - pte_t *ptep)
> -{
> - pte_clear(mm, addr, ptep);
> -}
> +void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
> + pte_t *ptep, unsigned long sz);
>
> #endif /* _ASM_GENERIC_HUGETLB_H */
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index 0e4d1fb3122f..2b0f6f96f2c1 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -3289,6 +3289,12 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
> return ret;
> }
>
> +void __weak huge_pte_clear(struct mm_struct *mm, unsigned long addr,
> + pte_t *ptep, unsigned long sz)
> +{
> + pte_clear(mm, addr, ptep);
> +}
> +
> void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
> unsigned long start, unsigned long end,
> struct page *ref_page)
I don't really like how this moves the inline version from asm-generic into
a __weak function here. I think it would be better to either stop
using asm-generic/hugetlb.h
on s390, or enclose the generic definition in
#ifndef huge_pte_clear
and then override by defining a macro in s390 as we do in other files
in asm-generic.
Arnd
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