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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _LINUX_SMPBOOT_H
- #define _LINUX_SMPBOOT_H
- #include <linux/types.h>
- struct task_struct;
- /* Cookie handed to the thread_fn*/
- struct smpboot_thread_data;
- /**
- * struct smp_hotplug_thread - CPU hotplug related thread descriptor
- * @store: Pointer to per cpu storage for the task pointers
- * @list: List head for core management
- * @thread_should_run: Check whether the thread should run or not. Called with
- * preemption disabled.
- * @thread_fn: The associated thread function
- * @create: Optional setup function, called when the thread gets
- * created (Not called from the thread context)
- * @setup: Optional setup function, called when the thread gets
- * operational the first time
- * @cleanup: Optional cleanup function, called when the thread
- * should stop (module exit)
- * @park: Optional park function, called when the thread is
- * parked (cpu offline)
- * @unpark: Optional unpark function, called when the thread is
- * unparked (cpu online)
- * @selfparking: Thread is not parked by the park function.
- * @thread_comm: The base name of the thread
- */
- struct smp_hotplug_thread {
- struct task_struct * __percpu *store;
- struct list_head list;
- int (*thread_should_run)(unsigned int cpu);
- void (*thread_fn)(unsigned int cpu);
- void (*create)(unsigned int cpu);
- void (*setup)(unsigned int cpu);
- void (*cleanup)(unsigned int cpu, bool online);
- void (*park)(unsigned int cpu);
- void (*unpark)(unsigned int cpu);
- bool selfparking;
- const char *thread_comm;
- };
- int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread);
- void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread);
- #endif
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