The patch titled
Subject: mm: add more BUILD_BUG_ONs to gfp_migratetype()
has been added to the -mm mm-unstable branch. Its filename is
mm-add-more-build_bug_ons-to-gfp_migratetype.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-add-more-build_bug_ons-to-gfp_migratetype.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Peter Collingbourne <pcc@xxxxxxxxxx>
Subject: mm: add more BUILD_BUG_ONs to gfp_migratetype()
Date: Tue, 26 Jul 2022 16:02:41 -0700
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@xxxxxxxxxx
Signed-off-by: Peter Collingbourne <pcc@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/gfp.h | 3 +++
1 file changed, 3 insertions(+)
--- a/include/linux/gfp.h~mm-add-more-build_bug_ons-to-gfp_migratetype
+++ a/include/linux/gfp.h
@@ -18,6 +18,9 @@ static inline int gfp_migratetype(const
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;
_
Patches currently in -mm which might be from pcc@xxxxxxxxxx are
mm-add-more-build_bug_ons-to-gfp_migratetype.patch
