Commit a7ba1212 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Linus Torvalds
Browse files

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: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Acked-by: default avatarCatalin 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: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 43c74ca3

arch/arm64/include/asm/cacheflush.h

+5 −41
Original line number Diff line number Diff line
@@ -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 */