From: Andrew Morton Because sometimes we don't implement the callback function if !CONFIG_SMP. Signed-off-by: Andrew Morton --- include/linux/smp.h | 8 +------- net/core/flow.c | 2 +- 2 files changed, 2 insertions(+), 8 deletions(-) diff -puN include/linux/smp.h~smp_call_function-must-be-a-macro include/linux/smp.h --- devel/include/linux/smp.h~smp_call_function-must-be-a-macro 2005-11-23 00:14:19.000000000 -0800 +++ devel-akpm/include/linux/smp.h 2005-11-23 00:20:54.000000000 -0800 @@ -94,13 +94,7 @@ void smp_prepare_boot_cpu(void); */ #define raw_smp_processor_id() 0 #define hard_smp_processor_id() 0 - -static inline int smp_call_function(void (*func) (void *info), void *info, - int retry, int wait) -{ - return 0; -} - +#define smp_call_function(func,info,retry,wait) ({ 0; }) #define on_each_cpu(func,info,retry,wait) ({ func(info); 0; }) static inline void smp_send_reschedule(int cpu) { } #define num_booting_cpus() 1 diff -puN net/core/flow.c~smp_call_function-must-be-a-macro net/core/flow.c --- devel/net/core/flow.c~smp_call_function-must-be-a-macro 2005-11-23 00:17:40.000000000 -0800 +++ devel-akpm/net/core/flow.c 2005-11-23 00:17:47.000000000 -0800 @@ -292,7 +292,7 @@ void flow_cache_flush(void) init_completion(&info.completion); local_bh_disable(); - smp_call_function(flow_cache_flush_per_cpu, &info, 1, 0); + (void)smp_call_function(flow_cache_flush_per_cpu, &info, 1, 0); flow_cache_flush_tasklet((unsigned long)&info); local_bh_enable(); _