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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2016-07-13 15:06:43 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-08-01 11:15:13 +1000 |
| commit | 5491ae7b6f48499b8892822cff371746f0b4102f (patch) | |
| tree | a8bb6c61ba9276e1b64d4ad2ef1b6c10b8508929 /mm/hugetlb.c | |
| parent | fbfa26d85418a155feacdb0f73cbf938f1027a8c (diff) | |
| download | op-kernel-dev-5491ae7b6f48499b8892822cff371746f0b4102f.zip op-kernel-dev-5491ae7b6f48499b8892822cff371746f0b4102f.tar.gz | |
powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range
Some archs like ppc64 need to do special things when flushing tlb for
hugepage. Add a new helper to flush hugetlb tlb range. This helps us to
avoid flushing the entire tlb mapping for the pid.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f904246..af2d882 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3938,6 +3938,14 @@ same_page: return i ? i : -EFAULT; } +#ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE +/* + * ARCHes with special requirements for evicting HUGETLB backing TLB entries can + * implement this. + */ +#define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) +#endif + unsigned long hugetlb_change_protection(struct vm_area_struct *vma, unsigned long address, unsigned long end, pgprot_t newprot) { @@ -3998,7 +4006,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma, * once we release i_mmap_rwsem, another task can do the final put_page * and that page table be reused and filled with junk. */ - flush_tlb_range(vma, start, end); + flush_hugetlb_tlb_range(vma, start, end); mmu_notifier_invalidate_range(mm, start, end); i_mmap_unlock_write(vma->vm_file->f_mapping); mmu_notifier_invalidate_range_end(mm, start, end); |
