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mm-skip-kasan-tagging-for-page-allocated-page-tables.patch removed from -mm tree

merged mm-stable Andrew Morton 1 participant 1 message May 29

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The quilt patch titled
Subject: mm: skip KASAN tagging for page-allocated page tables
has been removed from the -mm tree. Its filename was
mm-skip-kasan-tagging-for-page-allocated-page-tables.patch

This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Muhammad Usama Anjum <[email protected]>
Subject: mm: skip KASAN tagging for page-allocated page tables
Date: Wed, 29 Apr 2026 15:57:04 +0530

Page tables are always accessed via the linear mapping with a match-all tag, so HW-tag KASAN never checks them. For page-allocated tables (PTEs and PGDs etc), avoid the tag setup and poisoning overhead by using __GFP_SKIP_KASAN. SLUB-backed page tables are unchanged for now. (They aren't widely used and require more SLUB related skip logic. Leave it later.)

Link https://lore.kernel.org/[email protected] open here
Signed-off-by Muhammad Usama Anjum <[email protected]>
Signed-off-by Dev Jain <[email protected]>
Reviewed-by Ryan Roberts <[email protected]>
Reviewed-by Catalin Marinas <[email protected]>
Acked-by David Hildenbrand (Arm) <[email protected]>
Cc Arnd Bergmann <[email protected]>
Cc Ben Segall <[email protected]>
Cc Dietmar Eggemann <[email protected]>
Cc Ingo Molnar <[email protected]>
Cc Juri Lelli <[email protected]>
Cc Kees Cook <[email protected]>
Cc K Prateek Nayak <[email protected]>
Cc Liam Howlett <[email protected]>
Cc Lorenzo Stoakes <[email protected]>
Cc Mathieu Desnoyers <[email protected]>
Cc Mel Gorman <[email protected]>
Cc Michal Hocko <[email protected]>
Cc Mike Rapoport <[email protected]>
Cc Peter Zijlstra <[email protected]>
Cc Steven Rostedt <[email protected]>
Cc Suren Baghdasaryan <[email protected]>
Cc "Uladzislau Rezki (Sony)" <[email protected]>
Cc Valentin Schneider <[email protected]>
Cc Vincent Guittot <[email protected]>
Cc Vlastimil Babka <[email protected]>
Signed-off-by Andrew Morton <[email protected]>

---

 include/asm-generic/pgalloc.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
include/asm-generic/pgalloc.h renamed from include/asm-generic/pgalloc.h~mm-skip-kasan-tagging-for-page-allocated-page-tables +1 -1
@@ -4,7 +4,7 @@
 
 #ifdef CONFIG_MMU
 
-#define GFP_PGTABLE_KERNEL	(GFP_KERNEL | __GFP_ZERO)
+#define GFP_PGTABLE_KERNEL	(GFP_KERNEL | __GFP_ZERO | __GFP_SKIP_KASAN)
 #define GFP_PGTABLE_USER	(GFP_PGTABLE_KERNEL | __GFP_ACCOUNT)
 
 /**

_

Patches currently in -mm which might be from [email protected] are