From: Jinjiang Tu <tujinjiang@huawei.com>
To: <akpm@linux-foundation.org>, <david@kernel.org>, <ljs@kernel.org>,
<catalin.marinas@arm.com>, <will@kernel.org>,
<mark.rutland@arm.com>, <ryan.roberts@arm.com>,
<peterx@redhat.com>, <dave.jiang@intel.com>,
<linux-arm-kernel@lists.infradead.org>, <linux-mm@kvack.org>
Cc: <wangkefeng.wang@huawei.com>, <sunnanyong@huawei.com>,
<tujinjiang@huawei.com>
Subject: [PATCH 1/3] mm: define generic pudp_invalidate() implementation
Date: Wed, 9 Sep 2026 17:00:16 +0800 [thread overview]
Message-ID: <20260909090018.1991485-2-tujinjiang@huawei.com> (raw)
In-Reply-To: <20260909090018.1991485-1-tujinjiang@huawei.com>
x86 and riscv have identical pudp_invalidate() implementations. Move it to
mm/pgtable-generic.c with the __HAVE_ARCH_PUDP_INVALIDATE override guard.
PowerPC keeps its own implementation. In the later patch, arm64 will use
the generic implementation too.
No functional change intended.
Signed-off-by: Jinjiang Tu <tujinjiang@huawei.com>
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 1 +
arch/riscv/include/asm/pgtable.h | 3 ---
arch/riscv/mm/pgtable.c | 9 ---------
arch/x86/include/asm/pgtable.h | 3 ---
arch/x86/mm/pgtable.c | 12 ------------
include/linux/pgtable.h | 7 +++++++
mm/pgtable-generic.c | 14 ++++++++++++++
7 files changed, 22 insertions(+), 27 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index f4db7d7fbd5c..55d33c5537f1 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1419,6 +1419,7 @@ static inline pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm,
#define __HAVE_ARCH_PMDP_INVALIDATE
extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp);
+#define __HAVE_ARCH_PUDP_INVALIDATE
extern pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
pud_t *pudp);
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 40b1ed4f3ea8..327fa378032b 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -1159,9 +1159,6 @@ static inline pud_t pud_mkinvalid(pud_t pud)
return __pud(pud_val(pud) & ~(_PAGE_PRESENT | _PAGE_PROT_NONE));
}
-extern pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
- pud_t *pudp);
-
static inline pud_t pud_modify(pud_t pud, pgprot_t newprot)
{
return pte_pud(pte_modify(pud_pte(pud), newprot));
diff --git a/arch/riscv/mm/pgtable.c b/arch/riscv/mm/pgtable.c
index 9c4427d0b187..156e385e7db4 100644
--- a/arch/riscv/mm/pgtable.c
+++ b/arch/riscv/mm/pgtable.c
@@ -154,15 +154,6 @@ pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
return pmd;
}
-pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
- pud_t *pudp)
-{
- VM_WARN_ON_ONCE(!pud_present(*pudp));
- pud_t old = pudp_establish(vma, address, pudp, pud_mkinvalid(*pudp));
-
- flush_pud_tlb_range(vma, address, address + HPAGE_PUD_SIZE);
- return old;
-}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
pte_t pte_mkwrite(pte_t pte, struct vm_area_struct *vma)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index d5f4917c1edc..97051c02385e 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1387,9 +1387,6 @@ static inline pud_t pudp_establish(struct vm_area_struct *vma,
extern pmd_t pmdp_invalidate_ad(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);
-pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
- pud_t *pudp);
-
/*
* Page table pages are page-aligned. The lower half of the top
* level is used for userspace and the top half for the kernel.
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index cb03f5a2b243..0945908631dc 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -519,18 +519,6 @@ pmd_t pmdp_invalidate_ad(struct vm_area_struct *vma, unsigned long address,
}
#endif
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && \
- defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD)
-pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
- pud_t *pudp)
-{
- VM_WARN_ON_ONCE(!pud_present(*pudp));
- pud_t old = pudp_establish(vma, address, pudp, pud_mkinvalid(*pudp));
- flush_pud_tlb_range(vma, address, address + HPAGE_PUD_SIZE);
- return old;
-}
-#endif
-
/**
* reserve_top_address - Reserve a hole in the top of the kernel address space
* @reserve: Size of hole to reserve
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 8c093c119e5a..32173005b087 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1318,6 +1318,13 @@ extern pmd_t pmdp_invalidate_ad(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);
#endif
+#ifndef __HAVE_ARCH_PUDP_INVALIDATE
+#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
+extern pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
+ pud_t *pudp);
+#endif
+#endif
+
#ifndef __HAVE_ARCH_PTE_SAME
static inline int pte_same(pte_t pte_a, pte_t pte_b)
{
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index b91b1a98029c..ac1175d9a59a 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -217,6 +217,20 @@ pmd_t pmdp_invalidate_ad(struct vm_area_struct *vma, unsigned long address,
}
#endif
+#ifndef __HAVE_ARCH_PUDP_INVALIDATE
+#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
+pud_t pudp_invalidate(struct vm_area_struct *vma, unsigned long address,
+ pud_t *pudp)
+{
+ VM_WARN_ON_ONCE(!pud_present(*pudp));
+ pud_t old = pudp_establish(vma, address, pudp, pud_mkinvalid(*pudp));
+
+ flush_pud_tlb_range(vma, address, address + HPAGE_PUD_SIZE);
+ return old;
+}
+#endif
+#endif
+
#ifndef pmdp_collapse_flush
pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp)
--
2.43.0
next prev parent reply other threads:[~2026-09-09 9:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-09 9:00 [PATCH 0/3] arm64: Add support for PUD THP Jinjiang Tu
2026-09-09 9:00 ` Jinjiang Tu [this message]
2026-09-09 10:24 ` [PATCH 1/3] mm: define generic pudp_invalidate() implementation David Hildenbrand (Arm)
2026-09-11 2:28 ` Jinjiang Tu
2026-09-09 9:00 ` [PATCH 2/3] arm64: simplify pmd_special and pmd_mkspecial Jinjiang Tu
2026-09-09 9:00 ` [PATCH 3/3] arm64: Add support for PUD THP Jinjiang Tu
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