Messages in this thread | | | Date | Wed, 28 Nov 2018 14:10:51 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH V2 4/5] mm/hugetlb: Add prot_modify_start/commit sequence for hugetlb update |
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On Wed, 28 Nov 2018 20:04:37 +0530 "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> wrote:
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Some explanation of the motivation would be useful.
> include/linux/hugetlb.h | 18 ++++++++++++++++++ > mm/hugetlb.c | 8 +++++--- > 2 files changed, 23 insertions(+), 3 deletions(-) > > diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h > index 087fd5f48c91..e2a3b0c854eb 100644 > --- a/include/linux/hugetlb.h > +++ b/include/linux/hugetlb.h > @@ -543,6 +543,24 @@ static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr > set_huge_pte_at(mm, addr, ptep, pte); > } > #endif > + > +#ifndef huge_ptep_modify_prot_start > +static inline pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, > + unsigned long addr, pte_t *ptep) > +{ > + return huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); > +} > +#endif
#define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
> +#ifndef huge_ptep_modify_prot_commit > +static inline void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, > + unsigned long addr, pte_t *ptep, > + pte_t old_pte, pte_t pte) > +{ > + set_huge_pte_at(vma->vm_mm, addr, ptep, pte); > +} > +#endif
#define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
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