mm: use is_migrate_highatomic() to simplify the code
Introduce two helpers, is_migrate_highatomic() and is_migrate_highatomic_page().
Simplify the code, no functional changes.
[akpm@linux-foundation.org: use static inlines rather than macros, per mhocko]
Link: http://lkml.kernel.org/r/58B94F15.6060606@huawei.com
Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f82bedd..34ac324 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2036,8 +2036,8 @@
/* Yoink! */
mt = get_pageblock_migratetype(page);
- if (mt != MIGRATE_HIGHATOMIC &&
- !is_migrate_isolate(mt) && !is_migrate_cma(mt)) {
+ if (!is_migrate_highatomic(mt) && !is_migrate_isolate(mt)
+ && !is_migrate_cma(mt)) {
zone->nr_reserved_highatomic += pageblock_nr_pages;
set_pageblock_migratetype(page, MIGRATE_HIGHATOMIC);
move_freepages_block(zone, page, MIGRATE_HIGHATOMIC);
@@ -2094,8 +2094,7 @@
* from highatomic to ac->migratetype. So we should
* adjust the count once.
*/
- if (get_pageblock_migratetype(page) ==
- MIGRATE_HIGHATOMIC) {
+ if (is_migrate_highatomic_page(page)) {
/*
* It should never happen but changes to
* locking could inadvertently allow a per-cpu
@@ -2152,8 +2151,7 @@
page = list_first_entry(&area->free_list[fallback_mt],
struct page, lru);
- if (can_steal &&
- get_pageblock_migratetype(page) != MIGRATE_HIGHATOMIC)
+ if (can_steal && !is_migrate_highatomic_page(page))
steal_suitable_fallback(zone, page, start_migratetype);
/* Remove the page from the freelists */
@@ -2493,7 +2491,7 @@
/*
* We only track unmovable, reclaimable and movable on pcp lists.
* Free ISOLATE pages back to the allocator because they are being
- * offlined but treat RESERVE as movable pages so we can get those
+ * offlined but treat HIGHATOMIC as movable pages so we can get those
* areas back if necessary. Otherwise, we may have to free
* excessively into the page allocator
*/
@@ -2603,7 +2601,7 @@
for (; page < endpage; page += pageblock_nr_pages) {
int mt = get_pageblock_migratetype(page);
if (!is_migrate_isolate(mt) && !is_migrate_cma(mt)
- && mt != MIGRATE_HIGHATOMIC)
+ && !is_migrate_highatomic(mt))
set_pageblock_migratetype(page,
MIGRATE_MOVABLE);
}