mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 22:37:45 -04:00
Thomas Gleixner
e69aab1311
Kill the busy spinning on the control side and just wait for the hotplugged cpu to tell that it reached the dead state. Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] Cc: Rik van Riel <[email protected]> Cc: Rafael Wysocki <[email protected]> Cc: "Srivatsa S. Bhat" <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Arjan van de Ven <[email protected]> Cc: Sebastian Siewior <[email protected]> Cc: Rusty Russell <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Paul McKenney <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Paul Turner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
#ifndef __CPUHOTPLUG_H
|
|
#define __CPUHOTPLUG_H
|
|
|
|
enum cpuhp_state {
|
|
CPUHP_OFFLINE,
|
|
CPUHP_CREATE_THREADS,
|
|
CPUHP_NOTIFY_PREPARE,
|
|
CPUHP_BRINGUP_CPU,
|
|
CPUHP_AP_IDLE_DEAD,
|
|
CPUHP_AP_OFFLINE,
|
|
CPUHP_AP_NOTIFY_STARTING,
|
|
CPUHP_AP_ONLINE,
|
|
CPUHP_TEARDOWN_CPU,
|
|
CPUHP_AP_ONLINE_IDLE,
|
|
CPUHP_AP_SMPBOOT_THREADS,
|
|
CPUHP_AP_NOTIFY_ONLINE,
|
|
CPUHP_AP_ONLINE_DYN,
|
|
CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
|
|
CPUHP_ONLINE,
|
|
};
|
|
|
|
int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
|
|
int (*startup)(unsigned int cpu),
|
|
int (*teardown)(unsigned int cpu));
|
|
|
|
/**
|
|
* cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
|
|
* @state: The state for which the calls are installed
|
|
* @name: Name of the callback (will be used in debug output)
|
|
* @startup: startup callback function
|
|
* @teardown: teardown callback function
|
|
*
|
|
* Installs the callback functions and invokes the startup callback on
|
|
* the present cpus which have already reached the @state.
|
|
*/
|
|
static inline int cpuhp_setup_state(enum cpuhp_state state,
|
|
const char *name,
|
|
int (*startup)(unsigned int cpu),
|
|
int (*teardown)(unsigned int cpu))
|
|
{
|
|
return __cpuhp_setup_state(state, name, true, startup, teardown);
|
|
}
|
|
|
|
/**
|
|
* cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
|
|
* callbacks
|
|
* @state: The state for which the calls are installed
|
|
* @name: Name of the callback.
|
|
* @startup: startup callback function
|
|
* @teardown: teardown callback function
|
|
*
|
|
* Same as @cpuhp_setup_state except that no calls are executed are invoked
|
|
* during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
|
|
*/
|
|
static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
|
|
const char *name,
|
|
int (*startup)(unsigned int cpu),
|
|
int (*teardown)(unsigned int cpu))
|
|
{
|
|
return __cpuhp_setup_state(state, name, false, startup, teardown);
|
|
}
|
|
|
|
void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
|
|
|
|
/**
|
|
* cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
|
|
* @state: The state for which the calls are removed
|
|
*
|
|
* Removes the callback functions and invokes the teardown callback on
|
|
* the present cpus which have already reached the @state.
|
|
*/
|
|
static inline void cpuhp_remove_state(enum cpuhp_state state)
|
|
{
|
|
__cpuhp_remove_state(state, true);
|
|
}
|
|
|
|
/**
|
|
* cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
|
|
* teardown
|
|
* @state: The state for which the calls are removed
|
|
*/
|
|
static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
|
|
{
|
|
__cpuhp_remove_state(state, false);
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
void cpuhp_online_idle(enum cpuhp_state state);
|
|
#else
|
|
static inline void cpuhp_online_idle(enum cpuhp_state state) { }
|
|
#endif
|
|
|
|
#endif
|