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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: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Link: http://lkml.kernel.org/r/%3C20110518210136.223607682%40linutronix.de%3E
This commit is contained in:
Thomas Gleixner 2011-05-18 21:33:41 +00:00
parent 724ed53e8a
commit 847b2f42be
1 changed files with 23 additions and 22 deletions
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45
include/linux/clockchips.h
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@ -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