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-rw-r--r--mm/ptdump.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/ptdump.c b/mm/ptdump.c
index 61a352aa12ed..b600c7f864b8 100644
--- a/mm/ptdump.c
+++ b/mm/ptdump.c
@@ -176,6 +176,7 @@ void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd)
{
const struct ptdump_range *range = st->range;
+ get_online_mems();
mmap_write_lock(mm);
while (range->start != range->end) {
walk_page_range_debug(mm, range->start, range->end,
@@ -183,6 +184,7 @@ void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd)
range++;
}
mmap_write_unlock(mm);
+ put_online_mems();
/* Flush out the last page */
st->note_page_flush(st);