+ mm-constify-arguments-in-default-pxdp_get.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: constify arguments in default pxdp_get()
has been added to the -mm mm-new branch.  Its filename is
     mm-constify-arguments-in-default-pxdp_get.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-constify-arguments-in-default-pxdp_get.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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------------------------------------------------------
From: Anshuman Khandual <anshuman.khandual@arm.com>
Subject: mm: constify arguments in default pxdp_get()
Date: Fri, 18 Sep 2026 12:19:28 +0530

Generic MM default pxdp_get() helpers fetch the values contained in
pgtable entries via READ_ONCE() without modifying them.  Just make their
arguments explicitly 'const' for some additional protection.

Link: https://lore.kernel.org/20260918064928.793742-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: David Hildenbrand <david@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Pedro Falcato <pfalcato@suse.de>
---

 include/linux/pgtable.h |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/include/linux/pgtable.h~mm-constify-arguments-in-default-pxdp_get
+++ a/include/linux/pgtable.h
@@ -490,35 +490,35 @@ static inline int pudp_set_access_flags(
 #endif
 
 #ifndef ptep_get
-static inline pte_t ptep_get(pte_t *ptep)
+static inline pte_t ptep_get(const pte_t *ptep)
 {
 	return READ_ONCE(*ptep);
 }
 #endif
 
 #ifndef pmdp_get
-static inline pmd_t pmdp_get(pmd_t *pmdp)
+static inline pmd_t pmdp_get(const pmd_t *pmdp)
 {
 	return READ_ONCE(*pmdp);
 }
 #endif
 
 #ifndef pudp_get
-static inline pud_t pudp_get(pud_t *pudp)
+static inline pud_t pudp_get(const pud_t *pudp)
 {
 	return READ_ONCE(*pudp);
 }
 #endif
 
 #ifndef p4dp_get
-static inline p4d_t p4dp_get(p4d_t *p4dp)
+static inline p4d_t p4dp_get(const p4d_t *p4dp)
 {
 	return READ_ONCE(*p4dp);
 }
 #endif
 
 #ifndef pgdp_get
-static inline pgd_t pgdp_get(pgd_t *pgdp)
+static inline pgd_t pgdp_get(const pgd_t *pgdp)
 {
 	return READ_ONCE(*pgdp);
 }
_

Patches currently in -mm which might be from anshuman.khandual@arm.com are

mm-make-ptval_to_str-generally-available.patch
mm-stop-using-pxd_error.patch
loongarch-mm-stop-using-pte_error.patch
parisc-mm-directly-use-generic-_clear_bad.patch
sh-mm-stop-using-pte_error.patch
sh-mm-stop-using-_error.patch
sh-mm-stop-using-pgd_error.patch
mm-drop-pxd_error.patch
mm-constify-arguments-in-default-pxdp_get.patch