mm-memory-hotplug-fix-lowmem-count-overflow-when-offline-pages-fix

Fix CONFIG_HIGHMEM=n build

Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b1405cce554dece72aa0f11122a4940fb434e2ce..a1c6c3d3c5432f30b140fe79c7d92af66c04523b 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6178,8 +6178,10 @@ __offline_isolated_pages(unsigned long start_pfn, unsigned long end_pfn)
                list_del(&page->lru);
                rmv_page_order(page);
                zone->free_area[order].nr_free--;
+#ifdef CONFIG_HIGHMEM
                if (PageHighMem(page))
                        totalhigh_pages -= 1 << order;
+#endif
                for (i = 0; i < (1 << order); i++)
                        SetPageReserved((page+i));
                pfn += (1 << order);