From: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx> Subject: mm/page_alloc.c: replace the definition of NR_MIGRATETYPE_BITS with PB_migratetype_bits We already have the definition of PB_migratetype_bits and current NR_MIGRATETYPE_BITS looks like a cyclic definition. Just use PB_migratetype_bits is enough. Link: http://lkml.kernel.org/r/20200623124201.8199-1-richard.weiyang@xxxxxxxxxxxxxxxxx Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/mmzone.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/include/linux/mmzone.h~mm-page_allocc-replace-the-definition-of-nr_migratetype_bits-with-pb_migratetype_bits +++ a/include/linux/mmzone.h @@ -88,8 +88,7 @@ static inline bool is_migrate_movable(in extern int page_group_by_mobility_disabled; -#define NR_MIGRATETYPE_BITS (PB_migrate_end - PB_migrate + 1) -#define MIGRATETYPE_MASK ((1UL << NR_MIGRATETYPE_BITS) - 1) +#define MIGRATETYPE_MASK ((1UL << PB_migratetype_bits) - 1) #define get_pageblock_migratetype(page) \ get_pfnblock_flags_mask(page, page_to_pfn(page), \ _
