diff options
Diffstat (limited to 'include/linux/timecounter.h')
| -rw-r--r-- | include/linux/timecounter.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/timecounter.h b/include/linux/timecounter.h index 74f45496e6d1..4382035a75bb 100644 --- a/include/linux/timecounter.h +++ b/include/linux/timecounter.h @@ -19,6 +19,9 @@ #include <linux/types.h> +/* simplify initialization of mask field */ +#define CYCLECOUNTER_MASK(bits) (cycle_t)((bits) < 64 ? ((1ULL<<(bits))-1) : -1) + /** * struct cyclecounter - hardware abstraction for a free running counter * Provides completely state-free accessors to the underlying hardware. @@ -29,7 +32,7 @@ * @read: returns the current cycle value * @mask: bitmask for two's complement * subtraction of non 64 bit counters, - * see CLOCKSOURCE_MASK() helper macro + * see CYCLECOUNTER_MASK() helper macro * @mult: cycle to nanosecond multiplier * @shift: cycle to nanosecond divisor (power of two) */ |