diff options
| -rw-r--r-- | mm/hugetlb.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 8624b7758abb..ac65bb5e38ac 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4338,6 +4338,21 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, break; } } + + /* + * If subpage information not requested, update counters + * and skip the same_page loop below. + */ + if (!pages && !vmas && !pfn_offset && + (vaddr + huge_page_size(h) < vma->vm_end) && + (remainder >= pages_per_huge_page(h))) { + vaddr += huge_page_size(h); + remainder -= pages_per_huge_page(h); + i += pages_per_huge_page(h); + spin_unlock(ptl); + continue; + } + same_page: if (pages) { pages[i] = mem_map_offset(page, pfn_offset); |