From: Peter Collingbourne Date: Tue, 26 Jul 2022 23:02:41 +0000 (-0700) Subject: mm: add more BUILD_BUG_ONs to gfp_migratetype() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4d86d4f7227c6f2acfbbbe0623d49865aa71b756;p=linux.git mm: add more BUILD_BUG_ONs to gfp_migratetype() gfp_migratetype() also expects GFP_RECLAIMABLE and GFP_MOVABLE|GFP_RECLAIMABLE to be shiftable into MIGRATE_* enum values, so add some more BUILD_BUG_ONs to reflect this assumption. Link: https://linux-review.googlesource.com/id/Iae64e2182f75c3aca776a486b71a72571d66d83e Link: https://lkml.kernel.org/r/20220726230241.3770532-1-pcc@google.com Signed-off-by: Peter Collingbourne Signed-off-by: Andrew Morton --- diff --git a/include/linux/gfp.h b/include/linux/gfp.h index f314be58fa776..ea6cb9399152e 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -18,6 +18,9 @@ static inline int gfp_migratetype(const gfp_t gfp_flags) VM_WARN_ON((gfp_flags & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK); BUILD_BUG_ON((1UL << GFP_MOVABLE_SHIFT) != ___GFP_MOVABLE); BUILD_BUG_ON((___GFP_MOVABLE >> GFP_MOVABLE_SHIFT) != MIGRATE_MOVABLE); + BUILD_BUG_ON((___GFP_RECLAIMABLE >> GFP_MOVABLE_SHIFT) != MIGRATE_RECLAIMABLE); + BUILD_BUG_ON(((___GFP_MOVABLE | ___GFP_RECLAIMABLE) >> + GFP_MOVABLE_SHIFT) != MIGRATE_HIGHATOMIC); if (unlikely(page_group_by_mobility_disabled)) return MIGRATE_UNMOVABLE;