Currently the function 'follow_page_mask' does not take into account
PGD based huge page implementation. This change achieves that and
makes it complete.
Signed-off-by: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
---
mm/gup.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/gup.c b/mm/gup.c
index 7bf19ff..53a2013 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -232,6 +232,12 @@ struct page *follow_page_mask(struct vm_area_struct *vma,
pgd = pgd_offset(mm, address);
if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
return no_page_table(vma, flags);
+ if (pgd_huge(*pgd) && vma->vm_flags & VM_HUGETLB) {
+ page = follow_huge_pgd(mm, address, pgd, flags);
+ if (page)
+ return page;
+ return no_page_table(vma, flags);
+ }
pud = pud_offset(pgd, address);
if (pud_none(*pud))
--
2.1.0
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