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alpha: use asm-generic/cacheflush.h

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Alpha 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>
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: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2020-06-07 21:41:48 -07:00 committed by Linus Torvalds
parent 76b3b58fac
commit 43c74ca337
1 changed files with 6 additions and 22 deletions
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28
arch/alpha/include/asm/cacheflush.h
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@ -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)
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 */