From: Baoquan He <b...@redhat.com> [ Upstream commit d3ba3ae19751e476b0840a0c9a673a5766fa3219 ]
In node_states_check_changes_online(), N_HIGH_MEMORY is used to substitute ZONE_HIGHMEM directly. This is not right. N_HIGH_MEMORY is to mark the memory state of node. Here zone index is checked, which should be compared with 'ZONE_HIGHMEM' accordingly. Replace it with ZONE_HIGHMEM. This is a code cleanup - no known runtime effects. Link: http://lkml.kernel.org/r/20190320080732.14933-1-...@redhat.com Fixes: 8efe33f40f3e ("mm/memory_hotplug.c: simplify node_states_check_changes_online") Signed-off-by: Baoquan He <b...@redhat.com> Reviewed-by: David Hildenbrand <da...@redhat.com> Acked-by: Michal Hocko <mho...@suse.com> Reviewed-by: Oscar Salvador <osalva...@suse.de> Cc: Wei Yang <richard.weiy...@gmail.com> Cc: Mike Rapoport <r...@linux.ibm.com> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> Signed-off-by: Sasha Levin <sas...@kernel.org> --- mm/memory_hotplug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 28587f2901090..547e48addced1 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -700,7 +700,7 @@ static void node_states_check_changes_online(unsigned long nr_pages, if (zone_idx(zone) <= ZONE_NORMAL && !node_state(nid, N_NORMAL_MEMORY)) arg->status_change_nid_normal = nid; #ifdef CONFIG_HIGHMEM - if (zone_idx(zone) <= N_HIGH_MEMORY && !node_state(nid, N_HIGH_MEMORY)) + if (zone_idx(zone) <= ZONE_HIGHMEM && !node_state(nid, N_HIGH_MEMORY)) arg->status_change_nid_high = nid; #endif } -- 2.20.1
