diff options
Diffstat (limited to 'kernel/include/linux/smpboot.h')
| -rw-r--r-- | kernel/include/linux/smpboot.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/kernel/include/linux/smpboot.h b/kernel/include/linux/smpboot.h new file mode 100644 index 000000000..d600afb21 --- /dev/null +++ b/kernel/include/linux/smpboot.h @@ -0,0 +1,51 @@ +#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) + * @pre_unpark: Optional unpark function, called before the thread is + * unparked (cpu online). This is not guaranteed to be + * called on the target cpu of the thread. Careful! + * @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); + void (*pre_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 |