--- /dev/null
+--- a/arch/x86/include/asm/percpu.h
++++ b/arch/x86/include/asm/percpu.h
+@@ -76,7 +76,7 @@ extern void __bad_percpu_size(void);
+ do { \
+ typedef typeof(var) T__; \
+ if (0) { \
+- T__ tmp__; \
++ T__ tmp__ __maybe_unused; \
+ tmp__ = (val); \
+ } \
+ switch (sizeof(var)) { \