1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_CPUMASK_H
#define _ASM_X86_CPUMASK_H
#ifndef __ASSEMBLY__
#include <linux/cpumask.h>
extern void setup_cpu_local_masks(void);
/*
* NMI and MCE exceptions need cpu_is_offline() _really_ early,
* provide an arch_ special for them to avoid instrumentation.
*/
#if NR_CPUS > 1
static __always_inline bool arch_cpu_online(int cpu)
{
return arch_test_bit(cpu, cpumask_bits(cpu_online_mask));
}
static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
{
arch_clear_bit(cpumask_check(cpu), cpumask_bits(dstp));
}
#else
static __always_inline bool arch_cpu_online(int cpu)
{
return cpu == 0;
}
static __always_inline void arch_cpumask_clear_cpu(int cpu, struct cpumask *dstp)
{
return;
}
#endif
#define arch_cpu_is_offline(cpu) unlikely(!arch_cpu_online(cpu))
#endif /* __ASSEMBLY__ */
#endif /* _ASM_X86_CPUMASK_H */
|
