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arm64: use asm-generic/cacheflush.h
ARM64 needs almost no cache flushing routines of its own. Rely on asm-generic/cacheflush.h for the defaults. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200515143646.3857579-10-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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1 changed files with 5 additions and 41 deletions
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@ -94,20 +94,7 @@ static inline void flush_icache_range(unsigned long start, unsigned long end)
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kick_all_cpus_sync();
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}
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static inline void flush_cache_mm(struct mm_struct *mm)
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{
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}
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static inline void flush_cache_page(struct vm_area_struct *vma,
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unsigned long user_addr, unsigned long pfn)
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{
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}
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static inline void flush_cache_range(struct vm_area_struct *vma,
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unsigned long start, unsigned long end)
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{
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}
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#define flush_icache_range flush_icache_range
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/*
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* Cache maintenance functions used by the DMA API. No to be used directly.
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@ -123,12 +110,7 @@ extern void __dma_flush_area(const void *, size_t);
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*/
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extern void copy_to_user_page(struct vm_area_struct *, struct page *,
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unsigned long, void *, const void *, unsigned long);
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#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
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do { \
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memcpy(dst, src, len); \
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} while (0)
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#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
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#define copy_to_user_page copy_to_user_page
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/*
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* flush_dcache_page is used when the kernel has written to the page
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@ -154,29 +136,11 @@ static __always_inline void __flush_icache_all(void)
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dsb(ish);
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}
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#define flush_dcache_mmap_lock(mapping) do { } while (0)
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#define flush_dcache_mmap_unlock(mapping) do { } while (0)
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/*
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* We don't appear to need to do anything here. In fact, if we did, we'd
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* duplicate cache flushing elsewhere performed by flush_dcache_page().
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*/
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#define flush_icache_page(vma,page) do { } while (0)
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/*
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* Not required on AArch64 (PIPT or VIPT non-aliasing D-cache).
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*/
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static inline void flush_cache_vmap(unsigned long start, unsigned long end)
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{
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}
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static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
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{
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}
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int set_memory_valid(unsigned long addr, int numpages, int enable);
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int set_direct_map_invalid_noflush(struct page *page);
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int set_direct_map_default_noflush(struct page *page);
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#endif
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#include <asm-generic/cacheflush.h>
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#endif /* __ASM_CACHEFLUSH_H */
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