46 lines
972 B
C
46 lines
972 B
C
#include <linux/kernel.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/module.h>
|
|
|
|
int __first_cpu(const cpumask_t *srcp)
|
|
{
|
|
return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS));
|
|
}
|
|
EXPORT_SYMBOL(__first_cpu);
|
|
|
|
int __next_cpu(int n, const cpumask_t *srcp)
|
|
{
|
|
return min_t(int, NR_CPUS, find_next_bit(srcp->bits, NR_CPUS, n+1));
|
|
}
|
|
EXPORT_SYMBOL(__next_cpu);
|
|
|
|
/*
|
|
* Find the highest possible smp_processor_id()
|
|
*
|
|
* Note: if we're prepared to assume that cpu_possible_map never changes
|
|
* (reasonable) then this function should cache its return value.
|
|
*/
|
|
int highest_possible_processor_id(void)
|
|
{
|
|
unsigned int cpu;
|
|
unsigned highest = 0;
|
|
|
|
for_each_cpu_mask(cpu, cpu_possible_map)
|
|
highest = cpu;
|
|
return highest;
|
|
}
|
|
EXPORT_SYMBOL(highest_possible_processor_id);
|
|
|
|
int __any_online_cpu(const cpumask_t *mask)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_cpu_mask(cpu, *mask) {
|
|
if (cpu_online(cpu))
|
|
break;
|
|
}
|
|
return cpu;
|
|
}
|
|
EXPORT_SYMBOL(__any_online_cpu);
|