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openrisc: use asm-generic/cacheflush.h 

OpenRISC 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: Jonas Bonn <jonas@southpole.se>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Stafford Horne <shorne@gmail.com>
Link: http://lkml.kernel.org/r/20200515143646.3857579-16-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2020-06-07 21:42:09 -07:00 committed by Linus Torvalds
parent 9e730ffac1
commit e050945123
1 changed files with 6 additions and 25 deletions
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31
arch/openrisc/include/asm/cacheflush.h
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@ -62,31 +62,12 @@ static inline void flush_dcache_page(struct page *page)
clear_bit(PG_dc_clean, &page->flags);
}
/*
* Other interfaces are not required since we do not have virtually
* indexed or tagged caches. So we can use the default here.
*/
#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 flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define flush_icache_range(start, end) do { } while (0)
#define flush_icache_page(vma, pg) do { } while (0)
#define flush_icache_user_range(vma, pg, adr, len) do { } while (0)
#define flush_cache_vmap(start, end) do { } while (0)
#define flush_cache_vunmap(start, end) do { } while (0)
#define flush_icache_user_range(vma, page, addr, len) \
do { \
if (vma->vm_flags & VM_EXEC) \
sync_icache_dcache(page); \
} while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy(dst, src, len); \
if (vma->vm_flags & VM_EXEC) \
sync_icache_dcache(page); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len)
#include <asm-generic/cacheflush.h>
#endif /* __ASM_CACHEFLUSH_H */