+ mm-remove-prot-parameter-from-move_pte.patch added to mm-unstable branch

+ mm-remove-prot-parameter-from-move_pte.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: remove "prot" parameter from move_pte()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-remove-prot-parameter-from-move_pte.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-prot-parameter-from-move_pte.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: David Hildenbrand <david@redhat.com>
Subject: mm: remove "prot" parameter from move_pte()
Date: Wed, 27 Mar 2024 15:33:01 +0100

The "prot" parameter is unused, and using it instead of what's stored in
that particular PTE would very likely be wrong.  Let's simply remove it.

Link: https://lkml.kernel.org/r/20240327143301.741807-1-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/sparc/include/asm/pgtable_64.h |    2 +-
 include/linux/pgtable.h             |    2 +-
 mm/mremap.c                         |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

--- a/arch/sparc/include/asm/pgtable_64.h~mm-remove-prot-parameter-from-move_pte
+++ a/arch/sparc/include/asm/pgtable_64.h
@@ -957,7 +957,7 @@ static inline void set_ptes(struct mm_st
 
 #ifdef DCACHE_ALIASING_POSSIBLE
 #define __HAVE_ARCH_MOVE_PTE
-#define move_pte(pte, prot, old_addr, new_addr)				\
+#define move_pte(pte, old_addr, new_addr)				\
 ({									\
 	pte_t newpte = (pte);						\
 	if (tlb_type != hypervisor && pte_present(pte)) {		\
--- a/include/linux/pgtable.h~mm-remove-prot-parameter-from-move_pte
+++ a/include/linux/pgtable.h
@@ -1137,7 +1137,7 @@ static inline void arch_swap_restore(swp
 #endif
 
 #ifndef __HAVE_ARCH_MOVE_PTE
-#define move_pte(pte, prot, old_addr, new_addr)	(pte)
+#define move_pte(pte, old_addr, new_addr)	(pte)
 #endif
 
 #ifndef pte_accessible
--- a/mm/mremap.c~mm-remove-prot-parameter-from-move_pte
+++ a/mm/mremap.c
@@ -205,7 +205,7 @@ static int move_ptes(struct vm_area_stru
 		 */
 		if (pte_present(pte))
 			force_flush = true;
-		pte = move_pte(pte, new_vma->vm_page_prot, old_addr, new_addr);
+		pte = move_pte(pte, old_addr, new_addr);
 		pte = move_soft_dirty_pte(pte);
 		set_pte_at(mm, new_addr, new_pte, pte);
 	}
_

Patches currently in -mm which might be from david@redhat.com are

mm-secretmem-fix-gup-fast-succeeding-on-secretmem-folios.patch
mm-madvise-make-madv_populate_readwrite-handle-vm_fault_retry-properly.patch
mm-madvise-dont-perform-madvise-vma-walk-for-madv_populate_readwrite.patch
mm-userfaultfd-dont-place-zeropages-when-zeropages-are-disallowed.patch
s390-mm-re-enable-the-shared-zeropage-for-pv-and-skeys-kvm-guests.patch
mm-convert-folio_estimated_sharers-to-folio_likely_mapped_shared.patch
mm-convert-folio_estimated_sharers-to-folio_likely_mapped_shared-fix.patch
selftests-memfd_secret-add-vmsplice-test.patch
mm-merge-folio_is_secretmem-and-folio_fast_pin_allowed-into-gup_fast_folio_allowed.patch
mm-optimize-config_per_vma_lock-member-placement-in-vm_area_struct.patch
mm-remove-prot-parameter-from-move_pte.patch