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asm-generic: pgalloc: provide generic pgd_free()

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Most architectures define pgd_free() as a wrapper for free_page().

Provide a generic version in asm-generic/pgalloc.h and enable its use for
most architectures.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-7-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2020-08-06 23:22:47 -07:00 committed by Linus Torvalds
parent d9e8b92967
commit f9cb654cb5
19 changed files with 18 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/alpha/include/asm/pgalloc.h
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@ -34,10 +34,4 @@ pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
extern pgd_t *pgd_alloc(struct mm_struct *mm); extern pgd_t *pgd_alloc(struct mm_struct *mm);
static inline void
pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
#endif /* _ALPHA_PGALLOC_H */ #endif /* _ALPHA_PGALLOC_H */

1
arch/arm/include/asm/pgalloc.h
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@ -65,6 +65,7 @@ static inline void clean_pte_table(pte_t *pte)
#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL #define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
#define __HAVE_ARCH_PTE_ALLOC_ONE #define __HAVE_ARCH_PTE_ALLOC_ONE
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h> #include <asm-generic/pgalloc.h>
static inline pte_t * static inline pte_t *

1
arch/arm64/include/asm/pgalloc.h
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@ -13,6 +13,7 @@
#include <asm/cacheflush.h> #include <asm/cacheflush.h>
#include <asm/tlbflush.h> #include <asm/tlbflush.h>
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h> #include <asm-generic/pgalloc.h>
#define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t))

7
arch/csky/include/asm/pgalloc.h
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@ -9,7 +9,7 @@
#include <linux/sched.h> #include <linux/sched.h>
#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL #define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ #include <asm-generic/pgalloc.h>
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
pte_t *pte) pte_t *pte)
@ -42,11 +42,6 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
return pte; return pte;
} }
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_pages((unsigned long)pgd, PGD_ORDER);
}
static inline pgd_t *pgd_alloc(struct mm_struct *mm) static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{ {
pgd_t *ret; pgd_t *ret;

7
arch/hexagon/include/asm/pgalloc.h
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@ -11,7 +11,7 @@
#include <asm/mem-layout.h> #include <asm/mem-layout.h>
#include <asm/atomic.h> #include <asm/atomic.h>
#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ #include <asm-generic/pgalloc.h>
extern unsigned long long kmap_generation; extern unsigned long long kmap_generation;
@ -41,11 +41,6 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
return pgd; return pgd;
} }
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long) pgd);
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
pgtable_t pte) pgtable_t pte)
{ {

5
arch/ia64/include/asm/pgalloc.h
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@ -29,11 +29,6 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
return (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); return (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
} }
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
#if CONFIG_PGTABLE_LEVELS == 4 #if CONFIG_PGTABLE_LEVELS == 4
static inline void static inline void
p4d_populate(struct mm_struct *mm, p4d_t * p4d_entry, pud_t * pud) p4d_populate(struct mm_struct *mm, p4d_t * p4d_entry, pud_t * pud)

7
arch/m68k/include/asm/sun3_pgalloc.h
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@ -13,7 +13,7 @@
#include <asm/tlb.h> #include <asm/tlb.h>
#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ #include <asm-generic/pgalloc.h>
extern const char bad_pmd_string[]; extern const char bad_pmd_string[];
@ -40,11 +40,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page
*/ */
#define pmd_free(mm, x) do { } while (0) #define pmd_free(mm, x) do { } while (0)
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long) pgd);
}
static inline pgd_t * pgd_alloc(struct mm_struct *mm) static inline pgd_t * pgd_alloc(struct mm_struct *mm)
{ {
pgd_t *new_pgd; pgd_t *new_pgd;

6
arch/microblaze/include/asm/pgalloc.h
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@ -28,12 +28,6 @@ static inline pgd_t *get_pgd(void)
return (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, 0); return (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, 0);
} }
static inline void free_pgd(pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
#define pgd_free(mm, pgd) free_pgd(pgd)
#define pgd_alloc(mm) get_pgd() #define pgd_alloc(mm) get_pgd()
#define pmd_pgtable(pmd) pmd_page(pmd) #define pmd_pgtable(pmd) pmd_page(pmd)

5
arch/mips/include/asm/pgalloc.h
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@ -49,11 +49,6 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
extern void pgd_init(unsigned long page); extern void pgd_init(unsigned long page);
extern pgd_t *pgd_alloc(struct mm_struct *mm); extern pgd_t *pgd_alloc(struct mm_struct *mm);
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_pages((unsigned long)pgd, PGD_ORDER);
}
#define __pte_free_tlb(tlb,pte,address) \ #define __pte_free_tlb(tlb,pte,address) \
do { \ do { \
pgtable_pte_page_dtor(pte); \ pgtable_pte_page_dtor(pte); \

2
arch/nds32/mm/mm-nds32.c
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@ -2,6 +2,8 @@
// Copyright (C) 2005-2017 Andes Technology Corporation // Copyright (C) 2005-2017 Andes Technology Corporation
#include <linux/init_task.h> #include <linux/init_task.h>
#define __HAVE_ARCH_PGD_FREE
#include <asm/pgalloc.h> #include <asm/pgalloc.h>
#define FIRST_KERNEL_PGD_NR (USER_PTRS_PER_PGD) #define FIRST_KERNEL_PGD_NR (USER_PTRS_PER_PGD)

7
arch/nios2/include/asm/pgalloc.h
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@ -12,7 +12,7 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ #include <asm-generic/pgalloc.h>
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
pte_t *pte) pte_t *pte)
@ -34,11 +34,6 @@ extern void pmd_init(unsigned long page, unsigned long pagetable);
extern pgd_t *pgd_alloc(struct mm_struct *mm); extern pgd_t *pgd_alloc(struct mm_struct *mm);
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_pages((unsigned long)pgd, PGD_ORDER);
}
#define __pte_free_tlb(tlb, pte, addr) \ #define __pte_free_tlb(tlb, pte, addr) \
do { \ do { \
pgtable_pte_page_dtor(pte); \ pgtable_pte_page_dtor(pte); \

1
arch/parisc/include/asm/pgalloc.h
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@ -11,6 +11,7 @@
#include <asm/cache.h> #include <asm/cache.h>
#define __HAVE_ARCH_PMD_FREE #define __HAVE_ARCH_PMD_FREE
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h> #include <asm-generic/pgalloc.h>
/* Allocate the top level pgd (page directory) /* Allocate the top level pgd (page directory)

5
arch/riscv/include/asm/pgalloc.h
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@ -55,11 +55,6 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
return pgd; return pgd;
} }
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
#ifndef __PAGETABLE_PMD_FOLDED #ifndef __PAGETABLE_PMD_FOLDED
#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) #define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)

1
arch/sh/include/asm/pgalloc.h
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@ -6,6 +6,7 @@
#define __HAVE_ARCH_PMD_ALLOC_ONE #define __HAVE_ARCH_PMD_ALLOC_ONE
#define __HAVE_ARCH_PMD_FREE #define __HAVE_ARCH_PMD_FREE
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h> #include <asm-generic/pgalloc.h>
extern pgd_t *pgd_alloc(struct mm_struct *); extern pgd_t *pgd_alloc(struct mm_struct *);

1
arch/um/include/asm/pgalloc.h
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@ -25,7 +25,6 @@
* Allocate and free page tables. * Allocate and free page tables.
*/ */
extern pgd_t *pgd_alloc(struct mm_struct *); extern pgd_t *pgd_alloc(struct mm_struct *);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
#define __pte_free_tlb(tlb,pte, address) \ #define __pte_free_tlb(tlb,pte, address) \
do { \ do { \

5
arch/um/kernel/mem.c
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@ -196,11 +196,6 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
return pgd; return pgd;
} }
void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long) pgd);
}
void *uml_kmalloc(int size, int flags) void *uml_kmalloc(int size, int flags)
{ {
return kmalloc(size, flags); return kmalloc(size, flags);

1
arch/x86/include/asm/pgalloc.h
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@ -7,6 +7,7 @@
#include <linux/pagemap.h> #include <linux/pagemap.h>
#define __HAVE_ARCH_PTE_ALLOC_ONE #define __HAVE_ARCH_PTE_ALLOC_ONE
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h> #include <asm-generic/pgalloc.h>
static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; } static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }

5
arch/xtensa/include/asm/pgalloc.h
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@ -33,11 +33,6 @@ pgd_alloc(struct mm_struct *mm)
return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER); return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
} }
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
static inline void ptes_clear(pte_t *ptep) static inline void ptes_clear(pte_t *ptep)
{ {
int i; int i;

7
include/asm-generic/pgalloc.h
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@ -175,6 +175,13 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
#endif /* CONFIG_PGTABLE_LEVELS > 3 */ #endif /* CONFIG_PGTABLE_LEVELS > 3 */
#ifndef __HAVE_ARCH_PGD_FREE
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
#endif
#endif /* CONFIG_MMU */ #endif /* CONFIG_MMU */
#endif /* __ASM_GENERIC_PGALLOC_H */ #endif /* __ASM_GENERIC_PGALLOC_H */