--- zzzz-none-000/linux-2.6.39.4/arch/x86/include/asm/pvclock.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/arch/x86/include/asm/pvclock.h	2021-11-10 13:23:10.000000000 +0000
@@ -22,8 +22,6 @@
 	u64 product;
 #ifdef __i386__
 	u32 tmp1, tmp2;
-#else
-	ulong tmp;
 #endif
 
 	if (shift < 0)
@@ -44,11 +42,8 @@
 		: "a" ((u32)delta), "1" ((u32)(delta >> 32)), "2" (mul_frac) );
 #elif defined(__x86_64__)
 	__asm__ (
-		"mul %[mul_frac] ; shrd $32, %[hi], %[lo]"
-		: [lo]"=a"(product),
-		  [hi]"=d"(tmp)
-		: "0"(delta),
-		  [mul_frac]"rm"((u64)mul_frac));
+		"mul %%rdx ; shrd $32,%%rdx,%%rax"
+		: "=a" (product) : "0" (delta), "d" ((u64)mul_frac) );
 #else
 #error implement me!
 #endif