diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/softirq.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c index ad3295cdded..ec8fed42a86 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -16,6 +16,7 @@ #include <linux/cpu.h> #include <linux/kthread.h> #include <linux/rcupdate.h> +#include <linux/smp.h> #include <asm/irq.h> /* @@ -495,3 +496,22 @@ __init int spawn_ksoftirqd(void) register_cpu_notifier(&cpu_nfb); return 0; } + +#ifdef CONFIG_SMP +/* + * Call a function on all processors + */ +int on_each_cpu(void (*func) (void *info), void *info, int retry, int wait) +{ + int ret = 0; + + preempt_disable(); + ret = smp_call_function(func, info, retry, wait); + local_irq_disable(); + func(info); + local_irq_enable(); + preempt_enable(); + return ret; +} +EXPORT_SYMBOL(on_each_cpu); +#endif |