asm-generic: instrument usercopy in cacheflush.h

Notify memory tools about usercopy events in copy_to_user_page() and
copy_from_user_page().

Signed-off-by: Alexander Potapenko <glider@google.com>

include/asm-generic/cacheflush.h

@@ -2,6 +2,8 @@
 #ifndef _ASM_GENERIC_CACHEFLUSH_H
 #define _ASM_GENERIC_CACHEFLUSH_H
 
+#include <linux/instrumented.h>
+
 struct mm_struct;
 struct vm_area_struct;
 struct page;
@@ -105,14 +107,19 @@ static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
 #ifndef copy_to_user_page
 #define copy_to_user_page(vma, page, vaddr, dst, src, len)	\
 	do { \
+		instrument_copy_to_user(dst, src, len); \
 		memcpy(dst, src, len); \
 		flush_icache_user_page(vma, page, vaddr, len); \
 	} while (0)
 #endif
 
 #ifndef copy_from_user_page
 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
-	memcpy(dst, src, len)
+	do { \
+		instrument_copy_from_user_before(dst, src, len); \
+		memcpy(dst, src, len); \
+		instrument_copy_from_user_after(dst, src, len, 0); \
+	} while (0)
 #endif
 
 #endif /* _ASM_GENERIC_CACHEFLUSH_H */