Messages in this thread | | | Date | Mon, 27 Jun 2022 18:01:56 +0530 | Subject | Re: [RFC PATCH 06/26] mm: make free_p?d_range functions public | From | "manish.mishra" <> |
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On 24/06/22 11:06 pm, James Houghton wrote: > This makes them usable for HugeTLB page table freeing operations. > After HugeTLB high-granularity mapping, the page table for a HugeTLB VMA > can get more complex, and these functions handle freeing page tables > generally. > > Signed-off-by: James Houghton <jthoughton@google.com> reviewed-by: manish.mishra@nutanix.com > --- > include/linux/mm.h | 7 +++++++ > mm/memory.c | 8 ++++---- > 2 files changed, 11 insertions(+), 4 deletions(-) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index bc8f326be0ce..07f5da512147 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1847,6 +1847,13 @@ void unmap_vmas(struct mmu_gather *tlb, struct vm_area_struct *start_vma, > > struct mmu_notifier_range; > > +void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd, unsigned long addr); > +void free_pmd_range(struct mmu_gather *tlb, pud_t *pud, unsigned long addr, > + unsigned long end, unsigned long floor, unsigned long ceiling); > +void free_pud_range(struct mmu_gather *tlb, p4d_t *p4d, unsigned long addr, > + unsigned long end, unsigned long floor, unsigned long ceiling); > +void free_p4d_range(struct mmu_gather *tlb, pgd_t *pgd, unsigned long addr, > + unsigned long end, unsigned long floor, unsigned long ceiling); > void free_pgd_range(struct mmu_gather *tlb, unsigned long addr, > unsigned long end, unsigned long floor, unsigned long ceiling); > int > diff --git a/mm/memory.c b/mm/memory.c > index 7a089145cad4..bb3b9b5b94fb 100644 > --- a/mm/memory.c > +++ b/mm/memory.c > @@ -227,7 +227,7 @@ static void check_sync_rss_stat(struct task_struct *task) > * Note: this doesn't free the actual pages themselves. That > * has been handled earlier when unmapping all the memory regions. > */ > -static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd, > +void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd, > unsigned long addr) > { > pgtable_t token = pmd_pgtable(*pmd); > @@ -236,7 +236,7 @@ static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd, > mm_dec_nr_ptes(tlb->mm); > } > > -static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud, > +inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud, > unsigned long addr, unsigned long end, > unsigned long floor, unsigned long ceiling) > { > @@ -270,7 +270,7 @@ static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud, > mm_dec_nr_pmds(tlb->mm); > } > > -static inline void free_pud_range(struct mmu_gather *tlb, p4d_t *p4d, > +inline void free_pud_range(struct mmu_gather *tlb, p4d_t *p4d, > unsigned long addr, unsigned long end, > unsigned long floor, unsigned long ceiling) > { > @@ -304,7 +304,7 @@ static inline void free_pud_range(struct mmu_gather *tlb, p4d_t *p4d, > mm_dec_nr_puds(tlb->mm); > } > > -static inline void free_p4d_range(struct mmu_gather *tlb, pgd_t *pgd, > +inline void free_p4d_range(struct mmu_gather *tlb, pgd_t *pgd, > unsigned long addr, unsigned long end, > unsigned long floor, unsigned long ceiling) > {
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