mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
984f2f377f
Impact: cleanup Clean up based on feedback from Andrew Morton and others: - change to inline functions instead of macros - add __init to bootmem method - add a missing debug check Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/module.h>
|
|
#include <linux/bootmem.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);
|
|
|
|
#if NR_CPUS > 64
|
|
int __next_cpu_nr(int n, const cpumask_t *srcp)
|
|
{
|
|
return min_t(int, nr_cpu_ids,
|
|
find_next_bit(srcp->bits, nr_cpu_ids, n+1));
|
|
}
|
|
EXPORT_SYMBOL(__next_cpu_nr);
|
|
#endif
|
|
|
|
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);
|
|
|
|
/**
|
|
* cpumask_next_and - get the next cpu in *src1p & *src2p
|
|
* @n: the cpu prior to the place to search (ie. return will be > @n)
|
|
* @src1p: the first cpumask pointer
|
|
* @src2p: the second cpumask pointer
|
|
*
|
|
* Returns >= nr_cpu_ids if no further cpus set in both.
|
|
*/
|
|
int cpumask_next_and(int n, const struct cpumask *src1p,
|
|
const struct cpumask *src2p)
|
|
{
|
|
while ((n = cpumask_next(n, src1p)) < nr_cpu_ids)
|
|
if (cpumask_test_cpu(n, src2p))
|
|
break;
|
|
return n;
|
|
}
|
|
EXPORT_SYMBOL(cpumask_next_and);
|
|
|
|
/**
|
|
* cpumask_any_but - return a "random" in a cpumask, but not this one.
|
|
* @mask: the cpumask to search
|
|
* @cpu: the cpu to ignore.
|
|
*
|
|
* Often used to find any cpu but smp_processor_id() in a mask.
|
|
* Returns >= nr_cpu_ids if no cpus set.
|
|
*/
|
|
int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
|
|
{
|
|
unsigned int i;
|
|
|
|
cpumask_check(cpu);
|
|
for_each_cpu(i, mask)
|
|
if (i != cpu)
|
|
break;
|
|
return i;
|
|
}
|
|
|
|
/* These are not inline because of header tangles. */
|
|
#ifdef CONFIG_CPUMASK_OFFSTACK
|
|
bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
|
|
{
|
|
if (likely(slab_is_available()))
|
|
*mask = kmalloc(cpumask_size(), flags);
|
|
else {
|
|
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
|
|
printk(KERN_ERR
|
|
"=> alloc_cpumask_var: kmalloc not available!\n");
|
|
dump_stack();
|
|
#endif
|
|
*mask = NULL;
|
|
}
|
|
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
|
|
if (!*mask) {
|
|
printk(KERN_ERR "=> alloc_cpumask_var: failed!\n");
|
|
dump_stack();
|
|
}
|
|
#endif
|
|
return *mask != NULL;
|
|
}
|
|
EXPORT_SYMBOL(alloc_cpumask_var);
|
|
|
|
void __init alloc_bootmem_cpumask_var(cpumask_var_t *mask)
|
|
{
|
|
*mask = alloc_bootmem(cpumask_size());
|
|
}
|
|
|
|
void free_cpumask_var(cpumask_var_t mask)
|
|
{
|
|
kfree(mask);
|
|
}
|
|
EXPORT_SYMBOL(free_cpumask_var);
|
|
|
|
void __init free_bootmem_cpumask_var(cpumask_var_t mask)
|
|
{
|
|
free_bootmem((unsigned long)mask, cpumask_size());
|
|
}
|
|
#endif
|