diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cpumask.h | 58 |
1 files changed, 52 insertions, 6 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 31caa1bc620..21e1dd43e52 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -564,12 +564,36 @@ static inline unsigned int cpumask_check(unsigned int cpu) } #if NR_CPUS == 1 -/* Uniprocesor. */ -#define cpumask_first(src) ({ (void)(src); 0; }) -#define cpumask_next(n, src) ({ (void)(src); 1; }) -#define cpumask_next_zero(n, src) ({ (void)(src); 1; }) -#define cpumask_next_and(n, srcp, andp) ({ (void)(srcp), (void)(andp); 1; }) -#define cpumask_any_but(mask, cpu) ({ (void)(mask); (void)(cpu); 0; }) +/* Uniprocessor. Assume all masks are "1". */ +static inline unsigned int cpumask_first(const struct cpumask *srcp) +{ + return 0; +} + +/* Valid inputs for n are -1 and 0. */ +static inline unsigned int cpumask_next(int n, const struct cpumask *srcp) +{ + return n+1; +} + +static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp) +{ + return n+1; +} + +static inline unsigned int cpumask_next_and(int n, + const struct cpumask *srcp, + const struct cpumask *andp) +{ + return n+1; +} + +/* cpu must be a valid cpu, ie 0, so there's no other choice. */ +static inline unsigned int cpumask_any_but(const struct cpumask *mask, + unsigned int cpu) +{ + return 1; +} #define for_each_cpu(cpu, mask) \ for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask) @@ -620,10 +644,32 @@ static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp) int cpumask_next_and(int n, const struct cpumask *, const struct cpumask *); int cpumask_any_but(const struct cpumask *mask, unsigned int cpu); +/** + * for_each_cpu - iterate over every cpu in a mask + * @cpu: the (optionally unsigned) integer iterator + * @mask: the cpumask pointer + * + * After the loop, cpu is >= nr_cpu_ids. + */ #define for_each_cpu(cpu, mask) \ for ((cpu) = -1; \ (cpu) = cpumask_next((cpu), (mask)), \ (cpu) < nr_cpu_ids;) + +/** + * for_each_cpu_and - iterate over every cpu in both masks + * @cpu: the (optionally unsigned) integer iterator + * @mask: the first cpumask pointer + * @and: the second cpumask pointer + * + * This saves a temporary CPU mask in many places. It is equivalent to: + * struct cpumask tmp; + * cpumask_and(&tmp, &mask, &and); + * for_each_cpu(cpu, &tmp) + * ... + * + * After the loop, cpu is >= nr_cpu_ids. + */ #define for_each_cpu_and(cpu, mask, and) \ for ((cpu) = -1; \ (cpu) = cpumask_next_and((cpu), (mask), (and)), \ |