8df3e07e7f
Let the upcoming cpu kick the hotplug thread and let itself complete the bringup. That way the controll side can just wait for the completion or later when we made the hotplug machinery async not care at all. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: Rik van Riel <riel@redhat.com> Cc: Rafael Wysocki <rafael.j.wysocki@intel.com> Cc: "Srivatsa S. Bhat" <srivatsa@mit.edu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Tejun Heo <tj@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Turner <pjt@google.com> Link: http://lkml.kernel.org/r/20160226182341.697655464@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
#ifndef __CPUHOTPLUG_H
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#define __CPUHOTPLUG_H
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enum cpuhp_state {
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CPUHP_OFFLINE,
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CPUHP_CREATE_THREADS,
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CPUHP_NOTIFY_PREPARE,
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CPUHP_BRINGUP_CPU,
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CPUHP_AP_OFFLINE,
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CPUHP_AP_NOTIFY_STARTING,
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CPUHP_AP_ONLINE,
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CPUHP_TEARDOWN_CPU,
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CPUHP_AP_ONLINE_IDLE,
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CPUHP_AP_SMPBOOT_THREADS,
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CPUHP_AP_NOTIFY_ONLINE,
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CPUHP_AP_ONLINE_DYN,
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CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
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CPUHP_ONLINE,
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};
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int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
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int (*startup)(unsigned int cpu),
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int (*teardown)(unsigned int cpu));
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/**
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* cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
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* @state: The state for which the calls are installed
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* @name: Name of the callback (will be used in debug output)
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* @startup: startup callback function
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* @teardown: teardown callback function
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*
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* Installs the callback functions and invokes the startup callback on
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* the present cpus which have already reached the @state.
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*/
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static inline int cpuhp_setup_state(enum cpuhp_state state,
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const char *name,
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int (*startup)(unsigned int cpu),
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int (*teardown)(unsigned int cpu))
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{
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return __cpuhp_setup_state(state, name, true, startup, teardown);
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}
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/**
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* cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
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* callbacks
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* @state: The state for which the calls are installed
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* @name: Name of the callback.
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* @startup: startup callback function
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* @teardown: teardown callback function
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*
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* Same as @cpuhp_setup_state except that no calls are executed are invoked
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* during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
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*/
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static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
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const char *name,
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int (*startup)(unsigned int cpu),
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int (*teardown)(unsigned int cpu))
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{
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return __cpuhp_setup_state(state, name, false, startup, teardown);
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}
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void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
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/**
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* cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
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* @state: The state for which the calls are removed
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*
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* Removes the callback functions and invokes the teardown callback on
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* the present cpus which have already reached the @state.
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*/
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static inline void cpuhp_remove_state(enum cpuhp_state state)
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{
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__cpuhp_remove_state(state, true);
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}
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/**
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* cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
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* teardown
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* @state: The state for which the calls are removed
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*/
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static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
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{
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__cpuhp_remove_state(state, false);
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}
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#ifdef CONFIG_SMP
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void cpuhp_online_idle(enum cpuhp_state state);
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#else
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static inline void cpuhp_online_idle(enum cpuhp_state state) { }
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#endif
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#endif
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