android_kernel_xiaomi_sm8350/lib/cpumask.c
Greg Banks 0f532f3861 [PATCH] cpumask: add highest_possible_node_id
cpumask: add highest_possible_node_id(), analogous to
highest_possible_processor_id().

[pj@sgi.com: fix typo]
Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-02 07:57:17 -07:00

62 lines
1.2 KiB
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);
#if MAX_NUMNODES > 1
/*
* Find the highest possible node id.
*/
int highest_possible_node_id(void)
{
unsigned int node;
unsigned int highest = 0;
for_each_node_mask(node, node_possible_map)
highest = node;
return highest;
}
EXPORT_SYMBOL(highest_possible_node_id);
#endif