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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Mar 31, 2020 at 10:29:23PM +0800, Zhenyu Ye wrote: > diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h > index e2e2bef07dd2..32d4661e5a56 100644 > --- a/include/asm-generic/pgtable.h > +++ b/include/asm-generic/pgtable.h > @@ -1160,10 +1160,10 @@ static inline int pmd_free_pte_page(pmd_t *pmd, unsigned long addr) > * invalidate the entire TLB which is not desitable. > * e.g. see arch/arc: flush_pmd_tlb_range > */ > -#define flush_pmd_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) > +#define flush_pmd_tlb_range(tlb, vma, addr, end) flush_tlb_range(vma, addr, end) > #define flush_pud_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) > #else > -#define flush_pmd_tlb_range(vma, addr, end) BUILD_BUG() > +#define flush_pmd_tlb_range(tlb, vma, addr, end) BUILD_BUG() > #define flush_pud_tlb_range(vma, addr, end) BUILD_BUG() > #endif > #endif > diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c > index 3d7c01e76efc..96c9cf77bfb5 100644 > --- a/mm/pgtable-generic.c > +++ b/mm/pgtable-generic.c > @@ -109,8 +109,14 @@ int pmdp_set_access_flags(struct vm_area_struct *vma, > int changed = !pmd_same(*pmdp, entry); > VM_BUG_ON(address & ~HPAGE_PMD_MASK); > if (changed) { > + struct mmu_gather tlb; > + unsigned long tlb_start = address; > + unsigned long tlb_end = address + HPAGE_PMD_SIZE; > set_pmd_at(vma->vm_mm, address, pmdp, entry); > - flush_pmd_tlb_range(vma, address, address + HPAGE_PMD_SIZE); > + tlb_gather_mmu(&tlb, vma->vm_mm, tlb_start, tlb_end); > + tlb.cleared_pmds = 1; > + flush_pmd_tlb_range(&tlb, vma, tlb_start, tlb_end); > + tlb_finish_mmu(&tlb, tlb_start, tlb_end); > } > return changed; > } This is madness. Please, carefully consider what you just wrote and what it will do in the generic case. Instead of trying to retro-fit flush_*tlb_range() to take an mmu_gather parameter, please replace them out-right. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel