--- a/compat/Makefile
+++ b/compat/Makefile
-@@ -34,3 +34,8 @@ compat-$(CONFIG_COMPAT_KERNEL_2_6_39) +=
- compat-2.6.39.o \
- kstrtox.o
+@@ -38,3 +38,8 @@ compat-$(CONFIG_COMPAT_KERNEL_3_1) += \
+ cordic.o \
+ crc8.o
+ifndef CONFIG_64BIT
+ifndef CONFIG_GENERIC_ATOMIC64
+#include <linux/spinlock.h>
+#include <linux/module.h>
+
-+#if !defined(CONFIG_X86) && !((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) && defined(CONFIG_ARM) && !defined(CONFIG_GENERIC_ATOMIC64))
++#if !((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)) && (defined(CONFIG_UML) || defined(CONFIG_X86))) && !((LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) && defined(CONFIG_ARM) && !defined(CONFIG_GENERIC_ATOMIC64))
+
+static DEFINE_SPINLOCK(lock);
+
+
--- a/include/linux/compat-3.1.h
+++ b/include/linux/compat-3.1.h
-@@ -36,6 +36,18 @@
+@@ -19,6 +19,18 @@
.prod_id = { NULL, NULL, (v3), NULL }, \
.prod_id_hash = { 0, 0, (vh3), 0 }, }