Date: Thu, 28 May 2026 21:07:52 -0700
To: mm-commits@vger.kernel.org,vschneid@redhat.com,vincent.guittot@linaro.org,vbabka@kernel.org,urezki@gmail.com,surenb@google.com,ryan.roberts@arm.com,rppt@kernel.org,rostedt@goodmis.org,peterz@infradead.org,mingo@redhat.com,mhocko@suse.com,mgorman@suse.de,mathieu.desnoyers@efficios.com,ljs@kernel.org,liam@infradead.org,kprateek.nayak@amd.com,kees@kernel.org,juri.lelli@redhat.com,dietmar.eggemann@arm.com,dev.jain@arm.com,david@kernel.org,catalin.marinas@arm.com,bsegall@google.com,arnd@arndb.de,usama.anjum@arm.com,akpm@linux-foundation.org
From: Andrew Morton <akpm@linux-foundation.org>
Subject: [merged mm-stable] mm-skip-kasan-tagging-for-page-allocated-page-tables.patch removed from -mm tree
Message-Id: <20260529040753.1FB781F00893@smtp.kernel.org>
Precedence: bulk


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 <usama.anjum@arm.com>
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/20260429102704.680174-4-dev.jain@arm.com
Signed-off-by: Muhammad Usama Anjum <usama.anjum@arm.com>
Signed-off-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ben Segall <bsegall@google.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Kees Cook <kees@kernel.org>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Liam Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/asm-generic/pgalloc.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/asm-generic/pgalloc.h~mm-skip-kasan-tagging-for-page-allocated-page-tables
+++ a/include/asm-generic/pgalloc.h
@@ -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 usama.anjum@arm.com are