queue_stop_cpus_work

Name:queue_stop_cpus_work

Proto:static bool queue_stop_cpus_work(const struct cpumask *cpumask, cpu_stop_fn_t fn, void *arg, struct cpu_stop_done *done)

Type:bool

Parameter:

Type	Parameter	Name
const struct cpumask *	cpumask
cpu_stop_fn_t	fn
void *	arg
struct cpu_stop_done *	done

380

bool queued = false

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Even if we don't have any preemption, we need preempt disable/enable* to be barriers, so that we don't have things like get_user/put_user* that can cause faults and scheduling migrate into our preempt-protected* region.()

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stop_cpus_in_progress = true

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The "volatile" is due to gcc bugs ()

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work = per_cpu(stop_work, cpu)

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fn = fn

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arg = arg

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If queue @work to @stopper. if offline, @work is completed immediately Then queued = true

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The "volatile" is due to gcc bugs ()

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stop_cpus_in_progress = false

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preempt_enable()

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Return queued

**Caller**
Name	Describe
__stop_cpus
stop_machine_from_inactive_cpu	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

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