smp_call_function_single

Name:smp_call_function_single - Run a function on a specific CPU*@func: The function to run. This must be fast and non-blocking.*@info: An arbitrary pointer to pass to the function.*@wait: If true, wait until function has completed on other CPUs.

Proto:int smp_call_function_single(int cpu, smp_call_func_t func, void *info, int wait)

Type:int

Parameter:

Type	Parameter	Name
int	cpu
smp_call_func_t	func
void *	info
int	wait

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call_single_data_t csd_stack = {flags = CSD_FLAG_LOCK | CSD_FLAG_SYNCHRONOUS, }

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this_cpu = get_cpu()

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WARN_ON_ONCE(cpu_online(this_cpu) && Some architectures don't define arch_irqs_disabled(), so even if either* definition would be fine we need to use different ones for the time being* to avoid build issues.() && !Low level drivers may need that to know if they can schedule in* their unblank() callback or not. So let's export it.)

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WARN_ON_ONCE(!in_task())

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csd = csd_stack

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If Not wait Then

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csd = this_cpu_ptr( & csd_data)

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err = Insert a previously allocated call_single_data_t element* for execution on the given CPU. data must already have* ->func, ->info, and ->flags set.

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If wait Then sd_lock/csd_unlock used to serialize access to per-cpu csd resources* For non-synchronous ipi calls the csd can still be in use by the* previous function call. For multi-cpu calls its even more interesting

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Return err

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