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mm: consolidate pgtable_cache_init() and pgd_cache_init() 

Both pgtable_cache_init() and pgd_cache_init() are used to initialize kmem
cache for page table allocations on several architectures that do not use
PAGE_SIZE tables for one or more levels of the page table hierarchy.

Most architectures do not implement these functions and use __weak default
NOP implementation of pgd_cache_init().  Since there is no such default
for pgtable_cache_init(), its empty stub is duplicated among most
architectures.

Rename the definitions of pgd_cache_init() to pgtable_cache_init() and
drop empty stubs of pgtable_cache_init().

Link: http://lkml.kernel.org/r/1566457046-22637-1-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Will Deacon <will@kernel.org>		[arm64]
Acked-by: Thomas Gleixner <tglx@linutronix.de>	[x86]
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2019-09-23 15:35:31 -07:00 committed by Linus Torvalds
parent 1b9a9d8564
commit 782de70c42
36 changed files with 5 additions and 130 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/alpha/include/asm/pgtable.h
View File

@ -359,11 +359,6 @@ extern void paging_init(void);
#include <asm-generic/pgtable.h>
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
/* We have our own get_unmapped_area to cope with ADDR_LIMIT_32BIT. */
#define HAVE_ARCH_UNMAPPED_AREA

5
arch/arc/include/asm/pgtable.h
View File

@ -395,11 +395,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
/* to cope with aliasing VIPT cache */
#define HAVE_ARCH_UNMAPPED_AREA
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
#endif /* __ASSEMBLY__ */
#endif

5
arch/arm/include/asm/pgtable-nommu.h
View File

@ -70,11 +70,6 @@ typedef pte_t *pte_addr_t;
*/
extern unsigned int kobjsize(const void *objp);
/*
* No page table caches to initialise.
*/
#define pgtable_cache_init() do { } while (0)
/*
* All 32bit addresses are effectively valid for vmalloc...
* Sort of meaningless for non-VM targets.

2
arch/arm/include/asm/pgtable.h
View File

@ -368,8 +368,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
#define pgtable_cache_init() do { } while (0)
#endif /* !__ASSEMBLY__ */
#endif /* CONFIG_MMU */

2
arch/arm64/include/asm/pgtable.h
View File

@ -861,8 +861,6 @@ extern int kern_addr_valid(unsigned long addr);
#include <asm-generic/pgtable.h>
static inline void pgtable_cache_init(void) { }
/*
* On AArch64, the cache coherency is handled via the set_pte_at() function.
*/

2
arch/arm64/mm/pgd.c
View File

@ -35,7 +35,7 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd)
kmem_cache_free(pgd_cache, pgd);
}
void __init pgd_cache_init(void)
void __init pgtable_cache_init(void)
{
if (PGD_SIZE == PAGE_SIZE)
return;

5
arch/c6x/include/asm/pgtable.h
View File

@ -59,11 +59,6 @@ extern unsigned long empty_zero_page;
#define swapper_pg_dir ((pgd_t *) 0)
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
/*
* c6x is !MMU, so define the simpliest implementation
*/

5
arch/csky/include/asm/pgtable.h
View File

@ -296,11 +296,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
#define kern_addr_valid(addr) (1)
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do {} while (0)
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)

6
arch/h8300/include/asm/pgtable.h
View File

@ -4,7 +4,6 @@
#define __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nopud.h>
#include <asm-generic/pgtable.h>
#define pgtable_cache_init() do { } while (0)
extern void paging_init(void);
#define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */
#define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */
@ -34,11 +33,6 @@ static inline int pte_file(pte_t pte) { return 0; }
extern unsigned int kobjsize(const void *objp);
extern int is_in_rom(unsigned long);
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
/*
* All 32bit addresses are effectively valid for vmalloc...
* Sort of meaningless for non-VM targets.

3
arch/hexagon/include/asm/pgtable.h
View File

@ -431,9 +431,6 @@ static inline int pte_exec(pte_t pte)
#define __pte_offset(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
/* I think this is in case we have page table caches; needed by init/main.c */
#define pgtable_cache_init() do { } while (0)
/*
* Swap/file PTE definitions. If _PAGE_PRESENT is zero, the rest of the PTE is
* interpreted as swap information. The remaining free bits are interpreted as

2
arch/hexagon/mm/Makefile
View File

@ -3,5 +3,5 @@
# Makefile for Hexagon memory management subsystem
#
obj-y := init.o pgalloc.o ioremap.o uaccess.o vm_fault.o cache.o
obj-y := init.o ioremap.o uaccess.o vm_fault.o cache.o
obj-y += copy_to_user.o copy_from_user.o strnlen_user.o vm_tlb.o

10
arch/hexagon/mm/pgalloc.c
View File

@ -1,10 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
*/
#include <linux/init.h>
void __init pgtable_cache_init(void)
{
}

5
arch/ia64/include/asm/pgtable.h
View File

@ -566,11 +566,6 @@ extern struct page *zero_page_memmap_ptr;
#define KERNEL_TR_PAGE_SHIFT _PAGE_SIZE_64M
#define KERNEL_TR_PAGE_SIZE (1 << KERNEL_TR_PAGE_SHIFT)
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
/* These tell get_user_pages() that the first gate page is accessible from user-level. */
#define FIXADDR_USER_START GATE_ADDR
#ifdef HAVE_BUGGY_SEGREL

5
arch/m68k/include/asm/pgtable_mm.h
View File

@ -176,9 +176,4 @@ pgprot_t pgprot_dmacoherent(pgprot_t prot);
#include <asm-generic/pgtable.h>
#endif /* !__ASSEMBLY__ */
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
#endif /* _M68K_PGTABLE_H */

5
arch/m68k/include/asm/pgtable_no.h
View File

@ -44,11 +44,6 @@ extern void paging_init(void);
*/
#define ZERO_PAGE(vaddr) (virt_to_page(0))
/*
* No page table caches to initialise.
*/
#define pgtable_cache_init() do { } while (0)
/*
* All 32bit addresses are effectively valid for vmalloc...
* Sort of meaningless for non-VM targets.

7
arch/microblaze/include/asm/pgtable.h
View File

@ -46,8 +46,6 @@ extern int mem_init_done;
#define swapper_pg_dir ((pgd_t *) NULL)
#define pgtable_cache_init() do {} while (0)
#define arch_enter_lazy_cpu_mode() do {} while (0)
#define pgprot_noncached_wc(prot) prot
@ -526,11 +524,6 @@ extern unsigned long iopa(unsigned long addr);
/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
#define kern_addr_valid(addr) (1)
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
void do_page_fault(struct pt_regs *regs, unsigned long address,
unsigned long error_code);

5
arch/mips/include/asm/pgtable.h
View File

@ -661,9 +661,4 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
#endif /* _ASM_PGTABLE_H */

2
arch/nds32/include/asm/pgtable.h
View File

@ -403,8 +403,6 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
* into virtual address `from'
*/
#define pgtable_cache_init() do { } while (0)
#endif /* !__ASSEMBLY__ */
#endif /* _ASMNDS32_PGTABLE_H */

2
arch/nios2/include/asm/pgtable.h
View File

@ -291,8 +291,6 @@ static inline void pte_clear(struct mm_struct *mm,
#include <asm-generic/pgtable.h>
#define pgtable_cache_init() do { } while (0)
extern void __init paging_init(void);
extern void __init mmu_init(void);

5
arch/openrisc/include/asm/pgtable.h
View File

@ -443,11 +443,6 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
#include <asm-generic/pgtable.h>
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
typedef pte_t *pte_addr_t;
#endif /* __ASSEMBLY__ */

2
arch/parisc/include/asm/pgtable.h
View File

@ -132,8 +132,6 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
#define PTRS_PER_PTE (1UL << BITS_PER_PTE)
/* Definitions for 2nd level */
#define pgtable_cache_init() do { } while (0)
#define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE)
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))

1
arch/powerpc/include/asm/pgtable.h
View File

@ -87,7 +87,6 @@ extern unsigned long ioremap_bot;
unsigned long vmalloc_to_phys(void *vmalloc_addr);
void pgtable_cache_add(unsigned int shift);
void pgtable_cache_init(void);
#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32)
void mark_initmem_nx(void);

5
arch/riscv/include/asm/pgtable.h
View File

@ -424,11 +424,6 @@ extern void *dtb_early_va;
extern void setup_bootmem(void);
extern void paging_init(void);
static inline void pgtable_cache_init(void)
{
/* No page table caches to initialize */
}
#define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1)
#define VMALLOC_END (PAGE_OFFSET - 1)
#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)

5
arch/s390/include/asm/pgtable.h
View File

@ -1682,11 +1682,6 @@ extern void s390_reset_cmma(struct mm_struct *mm);
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
/*
* No page table caches to initialise
*/
static inline void pgtable_cache_init(void) { }
#include <asm-generic/pgtable.h>
#endif /* _S390_PAGE_H */

5
arch/sh/include/asm/pgtable.h
View File

@ -123,11 +123,6 @@ typedef pte_t *pte_addr_t;
#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
/*
* Initialise the page table caches
*/
extern void pgtable_cache_init(void);
struct vm_area_struct;
struct mm_struct;

4
arch/sh/mm/nommu.c
View File

@ -97,7 +97,3 @@ void __init page_table_range_init(unsigned long start, unsigned long end,
void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
{
}
void pgtable_cache_init(void)
{
}

5
arch/sparc/include/asm/pgtable_32.h
View File

@ -445,9 +445,4 @@ static inline int io_remap_pfn_range(struct vm_area_struct *vma,
/* We provide our own get_unmapped_area to cope with VA holes for userland */
#define HAVE_ARCH_UNMAPPED_AREA
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
#endif /* !(_SPARC_PGTABLE_H) */

1
arch/sparc/include/asm/pgtable_64.h
View File

@ -1135,7 +1135,6 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
unsigned long);
#define HAVE_ARCH_FB_UNMAPPED_AREA
void pgtable_cache_init(void);
void sun4v_register_fault_status(void);
void sun4v_ktsb_register(void);
void __init cheetah_ecache_flush_init(void);

2
arch/um/include/asm/pgtable.h
View File

@ -32,8 +32,6 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
/* zero page used for uninitialized stuff */
extern unsigned long *empty_zero_page;
#define pgtable_cache_init() do ; while (0)
/* Just any arbitrary offset to the start of the vmalloc VM area: the
* current 8MB value just means that there will be a 8MB "hole" after the
* physical memory until the kernel virtual memory starts. That means that

2
arch/unicore32/include/asm/pgtable.h
View File

@ -285,8 +285,6 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
#include <asm-generic/pgtable.h>
#define pgtable_cache_init() do { } while (0)
#endif /* !__ASSEMBLY__ */
#endif /* __UNICORE_PGTABLE_H__ */

1
arch/x86/include/asm/pgtable_32.h
View File

@ -29,7 +29,6 @@ extern pgd_t swapper_pg_dir[1024];
extern pgd_t initial_page_table[1024];
extern pmd_t initial_pg_pmd[];
static inline void pgtable_cache_init(void) { }
void paging_init(void);
void sync_initial_page_table(void);

2
arch/x86/include/asm/pgtable_64.h
View File

@ -241,8 +241,6 @@ extern void cleanup_highmap(void);
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
#define pgtable_cache_init() do { } while (0)
#define PAGE_AGP PAGE_KERNEL_NOCACHE
#define HAVE_PAGE_AGP 1

6
arch/x86/mm/pgtable.c
View File

@ -357,7 +357,7 @@ static void pgd_prepopulate_user_pmd(struct mm_struct *mm,
static struct kmem_cache *pgd_cache;
void __init pgd_cache_init(void)
void __init pgtable_cache_init(void)
{
/*
* When PAE kernel is running as a Xen domain, it does not use
@ -402,10 +402,6 @@ static inline void _pgd_free(pgd_t *pgd)
}
#else
void __init pgd_cache_init(void)
{
}
static inline pgd_t *_pgd_alloc(void)
{
return (pgd_t *)__get_free_pages(GFP_PGTABLE_USER,

1
arch/xtensa/include/asm/pgtable.h
View File

@ -238,7 +238,6 @@ extern void paging_init(void);
# define swapper_pg_dir NULL
static inline void paging_init(void) { }
#endif
static inline void pgtable_cache_init(void) { }
/*
* The pmd contains the kernel virtual address of the pte page.

2
include/asm-generic/pgtable.h
View File

@ -1126,7 +1126,7 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
static inline void init_espfix_bsp(void) { }
#endif
extern void __init pgd_cache_init(void);
extern void __init pgtable_cache_init(void);
#ifndef __HAVE_ARCH_PFN_MODIFY_ALLOWED
static inline bool pfn_modify_allowed(unsigned long pfn, pgprot_t prot)

3
init/main.c
View File

@ -507,7 +507,7 @@ void __init __weak mem_encrypt_init(void) { }
void __init __weak poking_init(void) { }
void __init __weak pgd_cache_init(void) { }
void __init __weak pgtable_cache_init(void) { }
bool initcall_debug;
core_param(initcall_debug, initcall_debug, bool, 0644);
@ -565,7 +565,6 @@ static void __init mm_init(void)
init_espfix_bsp();
/* Should be run after espfix64 is set up. */
pti_init();
pgd_cache_init();
}
void __init __weak arch_call_rest_init(void)