[PATCH] mm: Define general function pXd_init()

[Bibo Mao]

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

Signed-off-by: Bibo Mao <maobibo@xxxxxxxxxxx>
---
 arch/loongarch/include/asm/pgtable.h |  2 ++
 arch/mips/include/asm/pgtable-64.h   |  2 ++
 include/linux/mm.h                   |  2 --
 include/linux/pgtable.h              | 14 ++++++++++++++
 mm/kasan/init.c                      |  8 --------
 mm/sparse-vmemmap.c                  |  8 --------
 6 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
index 9965f52ef65b..8bd653a6fa70 100644
--- a/arch/loongarch/include/asm/pgtable.h
+++ b/arch/loongarch/include/asm/pgtable.h
@@ -267,7 +267,9 @@ extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pm
  * Initialize a new pgd / pud / pmd table with invalid pointers.
  */
 extern void pgd_init(void *addr);
+#define pud_init pud_init
 extern void pud_init(void *addr);
+#define pmd_init pmd_init
 extern void pmd_init(void *addr);
 
 /*
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index 401c1d9e4409..45c8572a0462 100644
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -316,7 +316,9 @@ static inline pmd_t *pud_pgtable(pud_t pud)
  * Initialize a new pgd / pud / pmd table with invalid pointers.
  */
 extern void pgd_init(void *addr);
+#define pud_init pud_init
 extern void pud_init(void *addr);
+#define pmd_init pmd_init
 extern void pmd_init(void *addr);
 
 /*
diff --git a/include/linux/mm.h b/include/linux/mm.h
index ecf63d2b0582..651bdc1bef48 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3818,8 +3818,6 @@ 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 pmd_init(void *addr);
-void pud_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 e8b2ac6bd2ae..bec5356ee644 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -90,6 +90,20 @@ static inline unsigned long pud_index(unsigned long address)
 #define pgd_index(a)  (((a) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
 #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)
 {
diff --git a/mm/kasan/init.c b/mm/kasan/init.c
index 89895f38f722..6b2dac62e63a 100644
--- a/mm/kasan/init.c
+++ b/mm/kasan/init.c
@@ -139,10 +139,6 @@ static int __ref zero_pmd_populate(pud_t *pud, unsigned long addr,
 	return 0;
 }
 
-void __weak __meminit pmd_init(void *addr)
-{
-}
-
 static int __ref zero_pud_populate(p4d_t *p4d, unsigned long addr,
 				unsigned long end)
 {
@@ -181,10 +177,6 @@ static int __ref zero_pud_populate(p4d_t *p4d, unsigned long addr,
 	return 0;
 }
 
-void __weak __meminit pud_init(void *addr)
-{
-}
-
 static int __ref zero_p4d_populate(pgd_t *pgd, unsigned long addr,
 				unsigned long end)
 {
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index edcc7a6b0f6f..a0c884947861 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -196,10 +196,6 @@ pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node)
 	return pmd;
 }
 
-void __weak __meminit pmd_init(void *addr)
-{
-}
-
 pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node)
 {
 	pud_t *pud = pud_offset(p4d, addr);
@@ -213,10 +209,6 @@ pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node)
 	return pud;
 }
 
-void __weak __meminit pud_init(void *addr)
-{
-}
-
 p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node)
 {
 	p4d_t *p4d = p4d_offset(pgd, addr);

base-commit: 87d6aab2389e5ce0197d8257d5f8ee965a67c4cd
-- 
2.39.3