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f358afc52c
flush_kernel_dcache_page is a rather confusing interface that implements a
subset of flush_dcache_page by not being able to properly handle page
cache mapped pages.
The only callers left are in the exec code as all other previous callers
were incorrect as they could have dealt with page cache pages. Replace
the calls to flush_kernel_dcache_page with calls to flush_dcache_page,
which for all architectures does either exactly the same thing, can
contains one or more of the following:
1) an optimization to defer the cache flush for page cache pages not
mapped into userspace
2) additional flushing for mapped page cache pages if cache aliases
are possible
Link: https://lkml.kernel.org/r/20210712060928.4161649-7-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: Alex Shi <alexs@kernel.org>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Guo Ren <guoren@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Yoshinori Sato <ysato@users.osdn.me>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2005-2017 Andes Technology Corporation
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#ifndef __NDS32_CACHEFLUSH_H__
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#define __NDS32_CACHEFLUSH_H__
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#include <linux/mm.h>
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#define PG_dcache_dirty PG_arch_1
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void flush_icache_range(unsigned long start, unsigned long end);
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#define flush_icache_range flush_icache_range
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void flush_icache_page(struct vm_area_struct *vma, struct page *page);
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#define flush_icache_page flush_icache_page
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#ifdef CONFIG_CPU_CACHE_ALIASING
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void flush_cache_mm(struct mm_struct *mm);
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void flush_cache_dup_mm(struct mm_struct *mm);
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void flush_cache_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end);
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void flush_cache_page(struct vm_area_struct *vma,
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unsigned long addr, unsigned long pfn);
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void flush_cache_kmaps(void);
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void flush_cache_vmap(unsigned long start, unsigned long end);
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void flush_cache_vunmap(unsigned long start, unsigned long end);
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#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
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void flush_dcache_page(struct page *page);
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void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, void *src, int len);
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void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, void *src, int len);
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#define ARCH_HAS_FLUSH_ANON_PAGE
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void flush_anon_page(struct vm_area_struct *vma,
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struct page *page, unsigned long vaddr);
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#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
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void flush_kernel_vmap_range(void *addr, int size);
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void invalidate_kernel_vmap_range(void *addr, int size);
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#define flush_dcache_mmap_lock(mapping) xa_lock_irq(&(mapping)->i_pages)
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#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&(mapping)->i_pages)
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#else
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void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long addr, int len);
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#define flush_icache_user_page flush_icache_user_page
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#include <asm-generic/cacheflush.h>
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#endif
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#endif /* __NDS32_CACHEFLUSH_H__ */
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