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-rw-r--r--include/linux/io.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h
index ce86120ce9d5..42e132808f00 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -21,7 +21,10 @@ void __iowrite32_copy(void __iomem *to, const void *from, size_t count);
#endif
void __ioread32_copy(void *to, const void __iomem *from, size_t count);
+
+#ifndef __iowrite64_copy
void __iowrite64_copy(void __iomem *to, const void *from, size_t count);
+#endif
#ifdef CONFIG_MMU
int ioremap_page_range(unsigned long addr, unsigned long end,