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committed 5448d44c385int dyn_event_release(int argc, char **argv, struct dyn_event_operations *type);/* SPDX-License-Identifier: GPL-2.0 *//* * Common header file for generic dynamic events. */struct dyn_event;/** * struct dyn_event_operations - Methods for each type of dynamic events * * These methods must be set for each type, since there is no default method. * Before using this for dyn_event_init(), it must be registered by * dyn_event_register(). * * @create: Parse and create event method. This is invoked when user passes * a event definition to dynamic_events interface. This must not destruct * the arguments and return -ECANCELED if given arguments doesn't match its * command prefix. * @show: Showing method. This is invoked when user reads the event definitions * via dynamic_events interface. * @is_busy: Check whether given event is busy so that it can not be deleted. * Return true if it is busy, otherwides false. * @free: Delete the given event. Return 0 if success, otherwides error. * @match: Check whether given event and system name match this event. * Return true if it matches, otherwides false. * * Except for @create, these methods are called under holding event_mutex. */struct dyn_event_operations { struct list_head list; int (*create)(int argc, const char *argv[]); int (*show)(struct seq_file *m, struct dyn_event *ev); bool (*is_busy)(struct dyn_event *ev); int (*free)(struct dyn_event *ev); bool (*match)(const char *system, const char *event, struct dyn_event *ev);};/* Register new dyn_event type -- must be called at first */int dyn_event_register(struct dyn_event_operations *ops);/** * struct dyn_event - Dynamic event list header * * The dyn_event structure encapsulates a list and a pointer to the operators * for making a global list of dynamic events. * User must includes this in each event structure, so that those events can * be added/removed via dynamic_events interface. */struct dyn_event { struct list_head list; struct dyn_event_operations *ops;};