From: Rusty Russell <rusty@rustcorp.com.au>

It's complaining about:

#define per_cpu(var, cpu)			((void)cpu, per_cpu__##var)

There are several ways of fixing this, but the simplest is:

#define per_cpu(var, cpu)			(*((void)cpu, &per_cpu__##var))



 include/asm-generic/percpu.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN include/asm-generic/percpu.h~percpu-gcc-34-warning-fix include/asm-generic/percpu.h
--- 25/include/asm-generic/percpu.h~percpu-gcc-34-warning-fix	2003-12-29 22:19:23.000000000 -0800
+++ 25-akpm/include/asm-generic/percpu.h	2003-12-29 22:19:23.000000000 -0800
@@ -29,7 +29,7 @@ do {								\
 #define DEFINE_PER_CPU(type, name) \
     __typeof__(type) per_cpu__##name
 
-#define per_cpu(var, cpu)			((void)cpu, per_cpu__##var)
+#define per_cpu(var, cpu)			(*((void)cpu, &per_cpu__##var))
 #define __get_cpu_var(var)			per_cpu__##var
 
 #endif	/* SMP */

_