Commit 43c74ca3 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Linus Torvalds
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alpha: use asm-generic/cacheflush.h 



Alpha 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>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Link: http://lkml.kernel.org/r/20200515143646.3857579-9-hch@lst.de


Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 76b3b58f

arch/alpha/include/asm/cacheflush.h

+6 −22
Original line number Diff line number Diff line
@@ -4,19 +4,6 @@ 


#include <linux/mm.h>



/* Caches aren't brain-dead on the Alpha. */

#define flush_cache_all()			do { } while (0)

#define flush_cache_mm(mm)			do { } while (0)

#define flush_cache_dup_mm(mm)			do { } while (0)

#define flush_cache_range(vma, start, end)	do { } while (0)

#define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0

#define flush_dcache_page(page)			do { } while (0)

#define flush_dcache_mmap_lock(mapping)		do { } while (0)

#define flush_dcache_mmap_unlock(mapping)	do { } while (0)

#define flush_cache_vmap(start, end)		do { } while (0)

#define flush_cache_vunmap(start, end)		do { } while (0)



/* Note that the following two definitions are _highly_ dependent

   on the contexts in which they are used in the kernel.  I personally

   think it is criminal how loosely defined these macros are.  */
@@ -59,20 +46,17 @@ flush_icache_user_range(struct vm_area_struct *vma, struct page *page, 
			mm->context[smp_processor_id()] = 0;

	}

}

#else

#define flush_icache_user_range flush_icache_user_range

#else /* CONFIG_SMP */

extern void flush_icache_user_range(struct vm_area_struct *vma,

		struct page *page, unsigned long addr, int len);

#endif

#define flush_icache_user_range flush_icache_user_range

#endif /* CONFIG_SMP */



/* This is used only in __do_fault and do_swap_page.  */

#define flush_icache_page(vma, page) \

	flush_icache_user_range((vma), (page), 0, 0)



#define copy_to_user_page(vma, page, vaddr, dst, src, len) \

do { memcpy(dst, src, len); \

     flush_icache_user_range(vma, page, vaddr, len); \

} while (0)

#define copy_from_user_page(vma, page, vaddr, dst, src, len) \

	memcpy(dst, src, len)

#include <asm-generic/cacheflush.h>



#endif /* _ALPHA_CACHEFLUSH_H */