The quilt patch titled
Subject: mm/kasan: use pXd_leaf() in shadow_mapped()
has been removed from the -mm tree. Its filename was
mm-kasan-use-pxd_leaf-in-shadow_mapped.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: Peter Xu <peterx@xxxxxxxxxx>
Subject: mm/kasan: use pXd_leaf() in shadow_mapped()
Date: Tue, 5 Mar 2024 12:37:46 +0800
There is an old trick in shadow_mapped() to use pXd_bad() to detect huge
pages. After commit 93fab1b22ef7 ("mm: add generic p?d_leaf() macros") we
have a global API for huge mappings. Use that to replace the trick.
Link: https://lkml.kernel.org/r/20240305043750.93762-7-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Reviewed-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: "Naveen N. Rao" <naveen.n.rao@xxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/shadow.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
--- a/mm/kasan/shadow.c~mm-kasan-use-pxd_leaf-in-shadow_mapped
+++ a/mm/kasan/shadow.c
@@ -199,19 +199,12 @@ static bool shadow_mapped(unsigned long
pud = pud_offset(p4d, addr);
if (pud_none(*pud))
return false;
-
- /*
- * We can't use pud_large() or pud_huge(), the first one is
- * arch-specific, the last one depends on HUGETLB_PAGE. So let's abuse
- * pud_bad(), if pud is bad then it's bad because it's huge.
- */
- if (pud_bad(*pud))
+ if (pud_leaf(*pud))
return true;
pmd = pmd_offset(pud, addr);
if (pmd_none(*pmd))
return false;
-
- if (pmd_bad(*pmd))
+ if (pmd_leaf(*pmd))
return true;
pte = pte_offset_kernel(pmd, addr);
return !pte_none(ptep_get(pte));
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
