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struct evdev {	int open;	struct input_handle handle;	wait_queue_head_t wait;	struct evdev_client __rcu *grab;	struct list_head client_list;	spinlock_t client_lock; /* protects client_list */	struct mutex mutex;	struct device dev;	struct cdev cdev;	bool exist;};

struct evdev_client {	unsigned int head;	unsigned int tail;	unsigned int packet_head; /* [future] position of the first element of next packet */	spinlock_t buffer_lock; /* protects access to buffer, head and tail */	struct fasync_struct *fasync;	struct evdev *evdev;	struct list_head node;	unsigned int clk_type;	bool revoked;	unsigned long *evmasks[EV_CNT];	unsigned int bufsize;	struct input_event buffer[];};

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