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-rw-r--r--mm/huge_memory.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 08a943b9cf95..3a8d6b7d95db 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -971,11 +971,12 @@ out_unlock:
return ret;
}
-struct page *follow_trans_huge_pmd(struct mm_struct *mm,
+struct page *follow_trans_huge_pmd(struct vm_area_struct *vma,
unsigned long addr,
pmd_t *pmd,
unsigned int flags)
{
+ struct mm_struct *mm = vma->vm_mm;
struct page *page = NULL;
assert_spin_locked(&mm->page_table_lock);
@@ -998,6 +999,14 @@ struct page *follow_trans_huge_pmd(struct mm_struct *mm,
_pmd = pmd_mkyoung(pmd_mkdirty(*pmd));
set_pmd_at(mm, addr & HPAGE_PMD_MASK, pmd, _pmd);
}
+ if ((flags & FOLL_MLOCK) && (vma->vm_flags & VM_LOCKED)) {
+ if (page->mapping && trylock_page(page)) {
+ lru_add_drain();
+ if (page->mapping)
+ mlock_vma_page(page);
+ unlock_page(page);
+ }
+ }
page += (addr & ~HPAGE_PMD_MASK) >> PAGE_SHIFT;
VM_BUG_ON(!PageCompound(page));
if (flags & FOLL_GET)