Re: [PATCH v4 04/11] hugetlb: Introduce generic version of huge_ptep_get_and_clear

From: Mike Kravetz
Date: Thu Jul 26 2018 - 15:04:01 EST

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On 07/05/2018 04:07 AM, Alexandre Ghiti wrote:
> arm, ia64, sh, x86 architectures use the
> same version of huge_ptep_get_and_clear, so move this generic
> implementation into asm-generic/hugetlb.h.
>

Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
--
Mike Kravetz

> Signed-off-by: Alexandre Ghiti <alex@xxxxxxxx>
> ---
> arch/arm/include/asm/hugetlb-3level.h | 6 ------
> arch/arm64/include/asm/hugetlb.h | 1 +
> arch/ia64/include/asm/hugetlb.h | 6 ------
> arch/mips/include/asm/hugetlb.h | 1 +
> arch/parisc/include/asm/hugetlb.h | 1 +
> arch/powerpc/include/asm/hugetlb.h | 1 +
> arch/sh/include/asm/hugetlb.h | 6 ------
> arch/sparc/include/asm/hugetlb.h | 1 +
> arch/x86/include/asm/hugetlb.h | 6 ------
> include/asm-generic/hugetlb.h | 8 ++++++++
> 10 files changed, 13 insertions(+), 24 deletions(-)
>
> diff --git a/arch/arm/include/asm/hugetlb-3level.h b/arch/arm/include/asm/hugetlb-3level.h
> index 398fb06e8207..ad36e84b819a 100644
> --- a/arch/arm/include/asm/hugetlb-3level.h
> +++ b/arch/arm/include/asm/hugetlb-3level.h
> @@ -49,12 +49,6 @@ static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
> ptep_set_wrprotect(mm, addr, ptep);
> }
>
> -static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> - unsigned long addr, pte_t *ptep)
> -{
> - return ptep_get_and_clear(mm, addr, ptep);
> -}
> -
> static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
> unsigned long addr, pte_t *ptep,
> pte_t pte, int dirty)
> diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
> index 874661a1dff1..6ae0bcafe162 100644
> --- a/arch/arm64/include/asm/hugetlb.h
> +++ b/arch/arm64/include/asm/hugetlb.h
> @@ -66,6 +66,7 @@ extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
> extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
> unsigned long addr, pte_t *ptep,
> pte_t pte, int dirty);
> +#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
> extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> unsigned long addr, pte_t *ptep);
> extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
> diff --git a/arch/ia64/include/asm/hugetlb.h b/arch/ia64/include/asm/hugetlb.h
> index a235d6f60fb3..6719c74da0de 100644
> --- a/arch/ia64/include/asm/hugetlb.h
> +++ b/arch/ia64/include/asm/hugetlb.h
> @@ -20,12 +20,6 @@ static inline int is_hugepage_only_range(struct mm_struct *mm,
> REGION_NUMBER((addr)+(len)-1) == RGN_HPAGE);
> }
>
> -static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> - unsigned long addr, pte_t *ptep)
> -{
> - return ptep_get_and_clear(mm, addr, ptep);
> -}
> -
> static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
> unsigned long addr, pte_t *ptep)
> {
> diff --git a/arch/mips/include/asm/hugetlb.h b/arch/mips/include/asm/hugetlb.h
> index 8ea439041d5d..0959cc5a41fa 100644
> --- a/arch/mips/include/asm/hugetlb.h
> +++ b/arch/mips/include/asm/hugetlb.h
> @@ -36,6 +36,7 @@ static inline int prepare_hugepage_range(struct file *file,
> return 0;
> }
>
> +#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
> static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> unsigned long addr, pte_t *ptep)
> {
> diff --git a/arch/parisc/include/asm/hugetlb.h b/arch/parisc/include/asm/hugetlb.h
> index 77c8adbac7c3..6e281e1bb336 100644
> --- a/arch/parisc/include/asm/hugetlb.h
> +++ b/arch/parisc/include/asm/hugetlb.h
> @@ -8,6 +8,7 @@
> void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
> pte_t *ptep, pte_t pte);
>
> +#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
> pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
> pte_t *ptep);
>
> diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
> index 0794b53439d4..970101cf9c82 100644
> --- a/arch/powerpc/include/asm/hugetlb.h
> +++ b/arch/powerpc/include/asm/hugetlb.h
> @@ -132,6 +132,7 @@ static inline int prepare_hugepage_range(struct file *file,
> return 0;
> }
>
> +#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
> static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> unsigned long addr, pte_t *ptep)
> {
> diff --git a/arch/sh/include/asm/hugetlb.h b/arch/sh/include/asm/hugetlb.h
> index bc552e37c1c9..08ee6c00b5e9 100644
> --- a/arch/sh/include/asm/hugetlb.h
> +++ b/arch/sh/include/asm/hugetlb.h
> @@ -25,12 +25,6 @@ static inline int prepare_hugepage_range(struct file *file,
> return 0;
> }
>
> -static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> - unsigned long addr, pte_t *ptep)
> -{
> - return ptep_get_and_clear(mm, addr, ptep);
> -}
> -
> static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
> unsigned long addr, pte_t *ptep)
> {
> diff --git a/arch/sparc/include/asm/hugetlb.h b/arch/sparc/include/asm/hugetlb.h
> index 16b0c53ea6c9..944e3a4bfaff 100644
> --- a/arch/sparc/include/asm/hugetlb.h
> +++ b/arch/sparc/include/asm/hugetlb.h
> @@ -16,6 +16,7 @@ extern struct pud_huge_patch_entry __pud_huge_patch, __pud_huge_patch_end;
> void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
> pte_t *ptep, pte_t pte);
>
> +#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
> pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
> pte_t *ptep);
>
> diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h
> index 554d5614b375..48b8d9b13cc6 100644
> --- a/arch/x86/include/asm/hugetlb.h
> +++ b/arch/x86/include/asm/hugetlb.h
> @@ -27,12 +27,6 @@ static inline int prepare_hugepage_range(struct file *file,
> return 0;
> }
>
> -static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> - unsigned long addr, pte_t *ptep)
> -{
> - return ptep_get_and_clear(mm, addr, ptep);
> -}
> -
> static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
> unsigned long addr, pte_t *ptep)
> {
> diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
> index ee010b756246..0f6f151780dd 100644
> --- a/include/asm-generic/hugetlb.h
> +++ b/include/asm-generic/hugetlb.h
> @@ -57,4 +57,12 @@ static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
> }
> #endif
>
> +#ifndef __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
> +static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
> + unsigned long addr, pte_t *ptep)
> +{
> + return ptep_get_and_clear(mm, addr, ptep);
> +}
> +#endif
> +
> #endif /* _ASM_GENERIC_HUGETLB_H */
>

Next message: Yang Shi: "Re: [RFC v6 PATCH 2/2] mm: mmap: zap pages with read mmap_sem in munmap"
Previous message: Mike Kravetz: "Re: [PATCH v4 03/11] hugetlb: Introduce generic version of set_huge_pte_at"
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