From 7269ed4af344184ab9bdf318fe8864cf64849735 Mon Sep 17 00:00:00 2001
From: Bibo Mao <maobibo@loongson.cn>
Date: Mon, 4 Nov 2024 15:07:12 +0800
Subject: mm: define general function pXd_init()

pud_init(), pmd_init() and kernel_pte_init() are duplicated defined in
file kasan.c and sparse-vmemmap.c as weak functions.  Move them to generic
header file pgtable.h, architecture can redefine them.

Link: https://lkml.kernel.org/r/20241104070712.52902-1-maobibo@loongson.cn
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 include/linux/mm.h      |  3 ---
 include/linux/pgtable.h | 21 +++++++++++++++++++++
 2 files changed, 21 insertions(+), 3 deletions(-)

(limited to 'include/linux')

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 32888a97ab44..5d6cd523c7c0 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3819,9 +3819,6 @@ void *sparse_buffer_alloc(unsigned long size);
 struct page * __populate_section_memmap(unsigned long pfn,
 		unsigned long nr_pages, int nid, struct vmem_altmap *altmap,
 		struct dev_pagemap *pgmap);
-void pud_init(void *addr);
-void pmd_init(void *addr);
-void kernel_pte_init(void *addr);
 pgd_t *vmemmap_pgd_populate(unsigned long addr, int node);
 p4d_t *vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node);
 pud_t *vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node);
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 23aeffd89a4e..adef9d6e9b1b 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -90,6 +90,27 @@ static inline unsigned long pud_index(unsigned long address)
 #define pgd_index(a)  (((a) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
 #endif
 
+#ifndef kernel_pte_init
+static inline void kernel_pte_init(void *addr)
+{
+}
+#define kernel_pte_init kernel_pte_init
+#endif
+
+#ifndef pmd_init
+static inline void pmd_init(void *addr)
+{
+}
+#define pmd_init pmd_init
+#endif
+
+#ifndef pud_init
+static inline void pud_init(void *addr)
+{
+}
+#define pud_init pud_init
+#endif
+
 #ifndef pte_offset_kernel
 static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
 {
-- 
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