nr_free_highpages() manually add statistics per each highmem zone and return total value for them. Whenever we add a new highmem zone, we need to consider this function and it's really troublesome. Make it handles all highmem zones by itself.
Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com> --- mm/highmem.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/mm/highmem.c b/mm/highmem.c index 123bcd3..50b4ca6 100644 --- a/mm/highmem.c +++ b/mm/highmem.c @@ -112,16 +112,12 @@ EXPORT_PER_CPU_SYMBOL(__kmap_atomic_idx); unsigned int nr_free_highpages (void) { - pg_data_t *pgdat; + struct zone *zone; unsigned int pages = 0; - for_each_online_pgdat(pgdat) { - pages += zone_page_state(&pgdat->node_zones[ZONE_HIGHMEM], - NR_FREE_PAGES); - if (zone_movable_is_highmem()) - pages += zone_page_state( - &pgdat->node_zones[ZONE_MOVABLE], - NR_FREE_PAGES); + for_each_populated_zone(zone) { + if (is_highmem(zone)) + pages += zone_page_state(zone, NR_FREE_PAGES); } return pages; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/