queue-6.6/parisc-define-and-use-set_pte_at.patch

From 802e55488bc2cc1ab6423b720255a785ccac42ce Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Mon, 21 Jul 2025 16:06:21 -0400
Subject: parisc: Define and use set_pte_at()

From: John David Anglin <dave.anglin@bell.net>

commit 802e55488bc2cc1ab6423b720255a785ccac42ce upstream.

When a PTE is changed, we need to flush the PTE. set_pte_at()
was lost in the folio update. PA-RISC version is the same as
the generic version.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v5.12+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/parisc/include/asm/pgtable.h |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -276,7 +276,7 @@ extern unsigned long *empty_zero_page;
 #define pte_none(x)     (pte_val(x) == 0)
 #define pte_present(x)	(pte_val(x) & _PAGE_PRESENT)
 #define pte_user(x)	(pte_val(x) & _PAGE_USER)
-#define pte_clear(mm, addr, xp)  set_pte(xp, __pte(0))
+#define pte_clear(mm, addr, xp) set_pte_at((mm), (addr), (xp), __pte(0))
 
 #define pmd_flag(x)	(pmd_val(x) & PxD_FLAG_MASK)
 #define pmd_address(x)	((unsigned long)(pmd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
@@ -398,6 +398,7 @@ static inline void set_ptes(struct mm_st
 	}
 }
 #define set_ptes set_ptes
+#define set_pte_at(mm, addr, ptep, pte) set_ptes(mm, addr, ptep, pte, 1)
 
 /* Used for deferring calls to flush_dcache_page() */
 
@@ -462,7 +463,7 @@ static inline int ptep_test_and_clear_yo
 	if (!pte_young(pte)) {
 		return 0;
 	}
-	set_pte(ptep, pte_mkold(pte));
+	set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte));
 	return 1;
 }
 
@@ -472,7 +473,7 @@ pte_t ptep_clear_flush(struct vm_area_st
 struct mm_struct;
 static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
-	set_pte(ptep, pte_wrprotect(*ptep));
+	set_pte_at(mm, addr, ptep, pte_wrprotect(*ptep));
 }
 
 #define pte_same(A,B)	(pte_val(A) == pte_val(B))