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Commit 847b2f42 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

clockevents: Restructure clock_event_device members 



Group the hot path members of struct clock_event_device together so we
have a better cache line footprint. Make it cacheline aligned.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Reviewed-by: default avatarIngo Molnar <mingo@elte.hu>
Link: http://lkml.kernel.org/r/%3C20110518210136.223607682%40linutronix.de%3E
parent 724ed53e

include/linux/clockchips.h

+23 −22
Original line number Diff line number Diff line
@@ -56,46 +56,47 @@ enum clock_event_nofitiers { 


/**

 * struct clock_event_device - clock event device descriptor

 * @name:		ptr to clock event name

 * @features:		features

 * @event_handler:	Assigned by the framework to be called by the low

 *			level handler of the event source

 * @set_next_event:	set next event function

 * @next_event:		local storage for the next event in oneshot mode

 * @max_delta_ns:	maximum delta value in ns

 * @min_delta_ns:	minimum delta value in ns

 * @mult:		nanosecond to cycles multiplier

 * @shift:		nanoseconds to cycles divisor (power of two)

 * @mode:		operating mode assigned by the management code

 * @features:		features

 * @retries:		number of forced programming retries

 * @set_mode:		set mode function

 * @broadcast:		function to broadcast events

 * @name:		ptr to clock event name

 * @rating:		variable to rate clock event devices

 * @irq:		IRQ number (only for non CPU local devices)

 * @cpumask:		cpumask to indicate for which CPUs this device works

 * @set_next_event:	set next event function

 * @set_mode:		set mode function

 * @event_handler:	Assigned by the framework to be called by the low

 *			level handler of the event source

 * @broadcast:		function to broadcast events

 * @list:		list head for the management code

 * @mode:		operating mode assigned by the management code

 * @next_event:		local storage for the next event in oneshot mode

 * @retries:		number of forced programming retries

 */

struct clock_event_device {

	const char		*name;

	unsigned int		features;

	void			(*event_handler)(struct clock_event_device *);

	int			(*set_next_event)(unsigned long evt,

						  struct clock_event_device *);

	ktime_t			next_event;

	u64			max_delta_ns;

	u64			min_delta_ns;

	u32			mult;

	u32			shift;

	enum clock_event_mode	mode;

	unsigned int		features;

	unsigned long		retries;



	void			(*broadcast)(const struct cpumask *mask);

	void			(*set_mode)(enum clock_event_mode mode,

					    struct clock_event_device *);

	const char		*name;

	int			rating;

	int			irq;

	const struct cpumask	*cpumask;

	int			(*set_next_event)(unsigned long evt,

						  struct clock_event_device *);

	void			(*set_mode)(enum clock_event_mode mode,

					    struct clock_event_device *);

	void			(*event_handler)(struct clock_event_device *);

	void			(*broadcast)(const struct cpumask *mask);

	struct list_head	list;

	enum clock_event_mode	mode;

	ktime_t			next_event;

	unsigned long		retries;

};

} ____cacheline_aligned;



/*

 * Calculate a multiplication factor for scaled math, which is used to convert