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linux-next/arch/csky/abiv1/cacheflush.c
Matthew Wilcox (Oracle) 842ca547f7 mm: move page_mapping_file to pagemap.h
page_mapping_file() is only used by some architectures, and then it
is usually only used in one place.  Make it a static inline function
so other architectures don't have to carry this dead code.

Link: https://lkml.kernel.org/r/20210317123011.350118-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-04-30 11:20:37 -07:00

78 lines
1.5 KiB
C

// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/syscalls.h>
#include <linux/spinlock.h>
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/cacheflush.h>
#include <asm/cachectl.h>
#define PG_dcache_clean PG_arch_1
void flush_dcache_page(struct page *page)
{
struct address_space *mapping;
if (page == ZERO_PAGE(0))
return;
mapping = page_mapping_file(page);
if (mapping && !page_mapcount(page))
clear_bit(PG_dcache_clean, &page->flags);
else {
dcache_wbinv_all();
if (mapping)
icache_inv_all();
set_bit(PG_dcache_clean, &page->flags);
}
}
EXPORT_SYMBOL(flush_dcache_page);
void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
pte_t *ptep)
{
unsigned long pfn = pte_pfn(*ptep);
struct page *page;
if (!pfn_valid(pfn))
return;
page = pfn_to_page(pfn);
if (page == ZERO_PAGE(0))
return;
if (!test_and_set_bit(PG_dcache_clean, &page->flags))
dcache_wbinv_all();
if (page_mapping_file(page)) {
if (vma->vm_flags & VM_EXEC)
icache_inv_all();
}
}
void flush_kernel_dcache_page(struct page *page)
{
struct address_space *mapping;
mapping = page_mapping_file(page);
if (!mapping || mapping_mapped(mapping))
dcache_wbinv_all();
}
EXPORT_SYMBOL(flush_kernel_dcache_page);
void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
dcache_wbinv_all();
if (vma->vm_flags & VM_EXEC)
icache_inv_all();
}