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Date: Sat, 1 Jun 2019 09:16:48 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Baoquan He <bhe@...hat.com>, David Hildenbrand <david@...hat.com>, Michal Hocko <mhocko@...e.com>, Oscar Salvador <osalvador@...e.de>, Wei Yang <richard.weiyang@...il.com>, Mike Rapoport <rppt@...ux.ibm.com>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Sasha Levin <sashal@...nel.org>, linux-mm@...ck.org Subject: [PATCH AUTOSEL 5.0 016/173] mm/memory_hotplug.c: fix the wrong usage of N_HIGH_MEMORY From: Baoquan He <bhe@...hat.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-bhe@redhat.com Fixes: 8efe33f40f3e ("mm/memory_hotplug.c: simplify node_states_check_changes_online") Signed-off-by: Baoquan He <bhe@...hat.com> Reviewed-by: David Hildenbrand <david@...hat.com> Acked-by: Michal Hocko <mhocko@...e.com> Reviewed-by: Oscar Salvador <osalvador@...e.de> Cc: Wei Yang <richard.weiyang@...il.com> Cc: Mike Rapoport <rppt@...ux.ibm.com> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org> Signed-off-by: Sasha Levin <sashal@...nel.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 e06e7a89d0e5b..33f1b8d307e64 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -684,7 +684,7 @@ 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
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