linux/arch/sh/mm/nommu.c
Mike Rapoport 782de70c42 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>
2019-09-24 15:54:09 -07:00

100 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* arch/sh/mm/nommu.c
*
* Various helper routines and stubs for MMUless SH.
*
* Copyright (C) 2002 - 2009 Paul Mundt
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/page.h>
#include <linux/uaccess.h>
/*
* Nothing too terribly exciting here ..
*/
void copy_page(void *to, void *from)
{
memcpy(to, from, PAGE_SIZE);
}
__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
{
memcpy(to, from, n);
return 0;
}
__kernel_size_t __clear_user(void *to, __kernel_size_t n)
{
memset(to, 0, n);
return 0;
}
void local_flush_tlb_all(void)
{
BUG();
}
void local_flush_tlb_mm(struct mm_struct *mm)
{
BUG();
}
void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
BUG();
}
void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
{
BUG();
}
void local_flush_tlb_one(unsigned long asid, unsigned long page)
{
BUG();
}
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
BUG();
}
void __flush_tlb_global(void)
{
}
void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
{
}
void __init kmap_coherent_init(void)
{
}
void *kmap_coherent(struct page *page, unsigned long addr)
{
BUG();
return NULL;
}
void kunmap_coherent(void *kvaddr)
{
BUG();
}
void __init page_table_range_init(unsigned long start, unsigned long end,
pgd_t *pgd_base)
{
}
void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
{
}