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arm64: use asm-generic/cacheflush.h

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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>
This commit is contained in:
Christoph Hellwig 2020-06-07 21:41:51 -07:00 committed by Linus Torvalds
parent 43c74ca337
commit a7ba121215
1 changed files with 5 additions and 41 deletions
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46
arch/arm64/include/asm/cacheflush.h
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@ -94,20 +94,7 @@ static inline void flush_icache_range(unsigned long start, unsigned long end)
kick_all_cpus_sync();
}
static inline void flush_cache_mm(struct mm_struct *mm)
{
}
static inline void flush_cache_page(struct vm_area_struct *vma,
unsigned long user_addr, unsigned long pfn)
{
}
static inline void flush_cache_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
}
#define flush_icache_range flush_icache_range
/*
* Cache maintenance functions used by the DMA API. No to be used directly.
@ -123,12 +110,7 @@ extern void __dma_flush_area(const void *, size_t);
*/
extern void copy_to_user_page(struct vm_area_struct *, struct page *,
unsigned long, void *, const void *, unsigned long);
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy(dst, src, len); \
} while (0)
#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
#define copy_to_user_page copy_to_user_page
/*
* flush_dcache_page is used when the kernel has written to the page
@ -154,29 +136,11 @@ static __always_inline void __flush_icache_all(void)
dsb(ish);
}
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
/*
* We don't appear to need to do anything here. In fact, if we did, we'd
* duplicate cache flushing elsewhere performed by flush_dcache_page().
*/
#define flush_icache_page(vma,page) do { } while (0)
/*
* Not required on AArch64 (PIPT or VIPT non-aliasing D-cache).
*/
static inline void flush_cache_vmap(unsigned long start, unsigned long end)
{
}
static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
{
}
int set_memory_valid(unsigned long addr, int numpages, int enable);
int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
#endif
#include <asm-generic/cacheflush.h>
#endif /* __ASM_CACHEFLUSH_H */