x86: put movsl_mask into uaccess.h.
x86_64 does not need it, but it won't have X86_INTEL_USERCOPY
defined either.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/uaccess.h b/include/asm-x86/uaccess.h
index 7c7b46a..0c4ab78 100644
--- a/include/asm-x86/uaccess.h
+++ b/include/asm-x86/uaccess.h
@@ -432,6 +432,15 @@
#define __get_user_unaligned __get_user
#define __put_user_unaligned __put_user
+/*
+ * movsl can be slow when source and dest are not both 8-byte aligned
+ */
+#ifdef CONFIG_X86_INTEL_USERCOPY
+extern struct movsl_mask {
+ int mask;
+} ____cacheline_aligned_in_smp movsl_mask;
+#endif
+
#ifdef CONFIG_X86_32
# include "uaccess_32.h"
#else