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Subject[PATCH v2 6/7] mm/hmm: remove hugetlbfs check in hmm_vma_walk_pmd
Date
walk_page_range() will only call hmm_vma_walk_hugetlb_entry() for
hugetlbfs pages and doesn't call hmm_vma_walk_pmd() in this case.
Therefore, it is safe to remove the check for vma->vm_flags & VM_HUGETLB
in hmm_vma_walk_pmd().

Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
---
mm/hmm.c | 3 ---
1 file changed, 3 deletions(-)

diff --git a/mm/hmm.c b/mm/hmm.c
index 838cd1d50497..29f322ca5d58 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -630,9 +630,6 @@ static int hmm_vma_walk_pmd(pmd_t *pmdp,
if (pmd_none(pmd))
return hmm_vma_walk_hole(start, end, walk);

- if (pmd_huge(pmd) && (range->vma->vm_flags & VM_HUGETLB))
- return hmm_pfns_bad(start, end, walk);
-
if (thp_migration_supported() && is_pmd_migration_entry(pmd)) {
bool fault, write_fault;
unsigned long npages;
--
2.20.1
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