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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
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
arch/alpha/include/asm/pgalloc.h
View file

@ -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);
static inline void
pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
#endif /* _ALPHA_PGALLOC_H */

1
arch/arm/include/asm/pgalloc.h
View file

@ -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
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h>
static inline pte_t *

1
arch/arm64/include/asm/pgalloc.h
View file

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

7
arch/csky/include/asm/pgalloc.h
View file

@ -9,7 +9,7 @@
#include <linux/sched.h>
#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,
pte_t *pte)
@ -42,11 +42,6 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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)
{
pgd_t *ret;

7
arch/hexagon/include/asm/pgalloc.h
View file

@ -11,7 +11,7 @@
#include <asm/mem-layout.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;
@ -41,11 +41,6 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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,
pgtable_t pte)
{

5
arch/ia64/include/asm/pgalloc.h
View file

@ -29,11 +29,6 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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
static inline void
p4d_populate(struct mm_struct *mm, p4d_t * p4d_entry, pud_t * pud)

7
arch/m68k/include/asm/sun3_pgalloc.h
View file

@ -13,7 +13,7 @@
#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[];
@ -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)
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)
{
pgd_t *new_pgd;

6
arch/microblaze/include/asm/pgalloc.h
View file

@ -28,12 +28,6 @@ static inline pgd_t *get_pgd(void)
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 pmd_pgtable(pmd) pmd_page(pmd)

5
arch/mips/include/asm/pgalloc.h
View file

@ -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 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) \
do { \
pgtable_pte_page_dtor(pte); \

2
arch/nds32/mm/mm-nds32.c
View file

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

7
arch/nios2/include/asm/pgalloc.h
View file

@ -12,7 +12,7 @@
#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,
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);
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) \
do { \
pgtable_pte_page_dtor(pte); \

1
arch/parisc/include/asm/pgalloc.h
View file

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

5
arch/riscv/include/asm/pgalloc.h
View file

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

1
arch/sh/include/asm/pgalloc.h
View file

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

1
arch/um/include/asm/pgalloc.h
View file

@ -25,7 +25,6 @@
* Allocate and free page tables.
*/
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) \
do { \

5
arch/um/kernel/mem.c
View file

@ -196,11 +196,6 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
return pgd;
}
void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long) pgd);
}
void *uml_kmalloc(int size, int flags)
{
return kmalloc(size, flags);

1
arch/x86/include/asm/pgalloc.h
View file

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

5
arch/xtensa/include/asm/pgalloc.h
View file

@ -33,11 +33,6 @@ pgd_alloc(struct mm_struct *mm)
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)
{
int i;

7
include/asm-generic/pgalloc.h
View file

@ -175,6 +175,13 @@ static inline void pud_free(struct mm_struct *mm, pud_t *pud)
#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 /* __ASM_GENERIC_PGALLOC_H */