[PATCH 14/31] ia64: use asm-generic/cacheflush.h

Christoph Hellwig
2020-05-10T07:54:53Z

IA64 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>
---
arch/ia64/include/asm/cacheflush.h | 28 +++-------------------------
1 file changed, 3 insertions(+), 25 deletions(-)

diff --git a/arch/ia64/include/asm/cacheflush.h b/arch/ia64/include/asm/cacheflush.h
index 6d3478f8abc89..a8f1c86ac242a 100644
--- a/arch/ia64/include/asm/cacheflush.h
+++ b/arch/ia64/include/asm/cacheflush.h
@@ -12,44 +12,22 @@

#include <asm/page.h>

-/*
- * Cache flushing routines. This is the kind of stuff that can be very expensive, so try
- * to avoid them whenever possible.
- */
-
-#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_icache_page(vma,page) do { } while (0)
-#define flush_cache_vmap(start, end) do { } while (0)
-#define flush_cache_vunmap(start, end) do { } while (0)
-
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
#define flush_dcache_page(page) \
do { \
clear_bit(PG_arch_1, &(page)->flags); \
} while (0)

-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-
-extern void flush_icache_range (unsigned long start, unsigned long end);
+extern void flush_icache_range(unsigned long start, unsigned long end);
+#define flush_icache_range flush_icache_range
extern void clflush_cache_range(void *addr, int size);

-
#define flush_icache_user_range(vma, page, user_addr, len) \
do { \
unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK); \
flush_icache_range(_addr, _addr + (len)); \
} while (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 /* _ASM_IA64_CACHEFLUSH_H */
--
2.26.2