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>

diff --git a/arch/openrisc/include/asm/cacheflush.h b/arch/openrisc/include/asm/cacheflush.h
index 79d5d77..74d1fce 100644 (file)
--- a/arch/openrisc/include/asm/cacheflush.h
+++ b/arch/openrisc/include/asm/cacheflush.h
@@ -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 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 flush_icache_user_range(vma, page, addr, len)  \
+do {                                                   \
+       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 */