diff options
Diffstat (limited to 'include/linux/proportions.h')
| -rw-r--r-- | include/linux/proportions.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/proportions.h b/include/linux/proportions.h index 2c3b3cad92be..5afc1b23346d 100644 --- a/include/linux/proportions.h +++ b/include/linux/proportions.h @@ -78,6 +78,19 @@ void prop_inc_percpu(struct prop_descriptor *pd, struct prop_local_percpu *pl) } /* + * Limit the time part in order to ensure there are some bits left for the + * cycle counter and fraction multiply. + */ +#define PROP_MAX_SHIFT (3*BITS_PER_LONG/4) + +#define PROP_FRAC_SHIFT (BITS_PER_LONG - PROP_MAX_SHIFT - 1) +#define PROP_FRAC_BASE (1UL << PROP_FRAC_SHIFT) + +void __prop_inc_percpu_max(struct prop_descriptor *pd, + struct prop_local_percpu *pl, long frac); + + +/* * ----- SINGLE ------ */ |