diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c
index a912fed..f73d737 100644
--- a/arch/i386/kernel/machine_kexec.c
+++ b/arch/i386/kernel/machine_kexec.c
@@ -116,13 +116,13 @@
 	__asm__ __volatile__ (
 		"\tljmp $"STR(__KERNEL_CS)",$1f\n"
 		"\t1:\n"
-		"\tmovl $"STR(__KERNEL_DS)",%eax\n"
-		"\tmovl %eax,%ds\n"
-		"\tmovl %eax,%es\n"
-		"\tmovl %eax,%fs\n"
-		"\tmovl %eax,%gs\n"
-		"\tmovl %eax,%ss\n"
-		);
+		"\tmovl $"STR(__KERNEL_DS)",%%eax\n"
+		"\tmovl %%eax,%%ds\n"
+		"\tmovl %%eax,%%es\n"
+		"\tmovl %%eax,%%fs\n"
+		"\tmovl %%eax,%%gs\n"
+		"\tmovl %%eax,%%ss\n"
+		::: "eax", "memory");
 #undef STR
 #undef __STR
 }
diff --git a/arch/x86_64/kernel/machine_kexec.c b/arch/x86_64/kernel/machine_kexec.c
index 89fab51..25ac8a3 100644
--- a/arch/x86_64/kernel/machine_kexec.c
+++ b/arch/x86_64/kernel/machine_kexec.c
@@ -140,7 +140,7 @@
 		"\tmovl %0,%%ss\n"
 		"\tmovl %0,%%fs\n"
 		"\tmovl %0,%%gs\n"
-		: : "a" (__KERNEL_DS)
+		: : "a" (__KERNEL_DS) : "memory"
 		);
 }
 
diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h
index bda2f21..6a2af2f 100644
--- a/include/asm-powerpc/kexec.h
+++ b/include/asm-powerpc/kexec.h
@@ -93,7 +93,8 @@
 			"mfxer  %0\n"
 			"std    %0, 296(%2)\n"
 			: "=&r" (tmp1), "=&r" (tmp2)
-			: "b" (newregs));
+			: "b" (newregs)
+			: "memory");
 	}
 }
 #else