diff options
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 47b469663822..6c6f5ccfcda1 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1363,8 +1363,11 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, */ if (unlikely(pmd_trans_migrating(*pmdp))) { page = pmd_page(*pmdp); + if (!get_page_unless_zero(page)) + goto out_unlock; spin_unlock(ptl); wait_on_page_locked(page); + put_page(page); goto out; } @@ -1396,8 +1399,11 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, /* Migration could have started since the pmd_trans_migrating check */ if (!page_locked) { + if (!get_page_unless_zero(page)) + goto out_unlock; spin_unlock(ptl); wait_on_page_locked(page); + put_page(page); page_nid = -1; goto out; } |