hmm_vma_walk_pmd() is called through mm_walk, but already has a goto
again loop of its own, so take part in that if pte_offset_map() fails.
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
---
mm/hmm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/hmm.c b/mm/hmm.c
index e23043345615..b1a9159d7c92 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -381,6 +381,8 @@ static int hmm_vma_walk_pmd(pmd_t *pmdp,
}
ptep = pte_offset_map(pmdp, addr);
+ if (!ptep)
+ goto again;
for (; addr < end; addr += PAGE_SIZE, ptep++, hmm_pfns++) {
int r;
--
2.35.3
