1 #include <linux/kernel.h> 2 #include <linux/bitops.h> 3 #include <linux/cpumask.h> 4 #include <linux/module.h> 5 6 int __first_cpu(const cpumask_t *srcp) 7 { 8 return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS)); 9 } 10 EXPORT_SYMBOL(__first_cpu); 11 12 int __next_cpu(int n, const cpumask_t *srcp) 13 { 14 return min_t(int, NR_CPUS, find_next_bit(srcp->bits, NR_CPUS, n+1)); 15 } 16 EXPORT_SYMBOL(__next_cpu); 17 18 /* 19 * Find the highest possible smp_processor_id() 20 * 21 * Note: if we're prepared to assume that cpu_possible_map never changes 22 * (reasonable) then this function should cache its return value. 23 */ 24 int highest_possible_processor_id(void) 25 { 26 unsigned int cpu; 27 unsigned highest = 0; 28 29 for_each_cpu_mask(cpu, cpu_possible_map) 30 highest = cpu; 31 return highest; 32 } 33 EXPORT_SYMBOL(highest_possible_processor_id); 34 35 int __any_online_cpu(const cpumask_t *mask) 36 { 37 int cpu; 38 39 for_each_cpu_mask(cpu, *mask) { 40 if (cpu_online(cpu)) 41 break; 42 } 43 return cpu; 44 } 45 EXPORT_SYMBOL(__any_online_cpu); 46