stop_machine_from_inactive_cpu

Name:stop_machine_from_inactive_cpu - stop_machine() from inactive CPU*@fn: the function to run*@data: the data ptr for the @fn()*@cpus: the cpus to run the @fn() on (NULL = any online cpu)* This is identical to stop_machine() but can be called from a CPU which

Proto:int stop_machine_from_inactive_cpu(cpu_stop_fn_t fn, void *data, const struct cpumask *cpus)

Type:int

Parameter:

Type	Parameter	Name
cpu_stop_fn_t	fn
void *	data
const struct cpumask *	cpus

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struct multi_stop_data msdata = {fn = fn, data = data, active_cpus = cpus}

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BUG_ON(cpu_active(These macros fold the SMP functionality into a single CPU system()))

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Like num_online_cpus(), but hotplug cpu uses us, so we need this. = num_active_cpus() + 1

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When Not mutex_trylock - try to acquire the mutex, without waiting*@lock: the mutex to be acquired* Try to acquire the mutex atomically cycle

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set_state( & msdata, MULTI_STOP_PREPARE)

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cpu_stop_init_done( & done, num_active_cpus())

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queue_stop_cpus_work(cpu_active_mask, This is the cpu_stop function which stops the CPU. , & msdata, & done)

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ret = This is the cpu_stop function which stops the CPU.

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When Not mpletion_done - Test to see if a completion has any waiters*@x: completion structure* Return: 0 if there are waiters (wait_for_completion() in progress)* 1 if there are no waiters.* Note, this will always return true if complete_all() was called on @X. cycle

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mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

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Return If ret Else collected return value

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