UBUNTU: SAUCE: Clear Linux: ksm-wakeups

[mirror_ubuntu-bionic-kernel.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7e5e775e97f400d8a050effc41f68a8261bd9a23..76c9688b6a0a75fc1c28e90920a8c9498c5e6d06 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6260,6 +6260,8 @@ void __paginginit zero_resv_unavail(void)
        pgcnt = 0;
        for_each_resv_unavail_range(i, &start, &end) {
                for (pfn = PFN_DOWN(start); pfn < PFN_UP(end); pfn++) {
+                       if (!pfn_valid(ALIGN_DOWN(pfn, pageblock_nr_pages)))
+                               continue;
                        mm_zero_struct_page(pfn_to_page(pfn));
                        pgcnt++;
                }