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[PATCH] clocksource: replace is_continuous by a flag field

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Using a flag filed allows to encode more than one information into a variable.
Preparatory patch for the generic clocksource verification.

[mingo@elte.hu: convert vmitime.c to the new clocksource flag]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Thomas Gleixner 2007-02-16 01:27:36 -08:00 • committed by Linus Torvalds
parent 95492e4646
commit 73b08d2aa4
9 changed files with 20 additions and 11 deletions
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10
include/linux/clocksource.h
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@ -45,7 +45,7 @@ typedef u64 cycle_t;
* @mult: cycle to nanosecond multiplier
* @shift: cycle to nanosecond divisor (power of two)
* @update_callback: called when safe to alter clocksource values
* @is_continuous: defines if clocksource is free-running.
* @flags: flags describing special properties
* @cycle_interval: Used internally by timekeeping core, please ignore.
* @xtime_interval: Used internally by timekeeping core, please ignore.
*/
@ -58,7 +58,7 @@ struct clocksource {
u32 mult;
u32 shift;
int (*update_callback)(void);
int is_continuous;
unsigned long flags;
/* timekeeping specific data, ignore */
cycle_t cycle_last, cycle_interval;
@ -66,6 +66,12 @@ struct clocksource {
s64 error;
};
/*
* Clock source flags bits::
*/
#define CLOCK_SOURCE_IS_CONTINUOUS 0x01
#define CLOCK_SOURCE_MUST_VERIFY 0x02
/* simplify initialization of mask field */
#define CLOCKSOURCE_MASK(bits) (cycle_t)(bits<64 ? ((1ULL<<bits)-1) : -1)