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ebpf: add sched_cls_type and map it to sk_filter's verifier ops
[mirror_ubuntu-bionic-kernel.git] / kernel / up.c
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1/*
2 * Uniprocessor-only support functions. The counterpart to kernel/smp.c
3 */
4
6e962814 5#include <linux/interrupt.h>
53ce3d95 6#include <linux/kernel.h>
9984de1a 7#include <linux/export.h>
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8#include <linux/smp.h>
9
10int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
11 int wait)
12{
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13 unsigned long flags;
14
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15 WARN_ON(cpu != 0);
16
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17 local_irq_save(flags);
18 func(info);
19 local_irq_restore(flags);
93423b86 20
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21 return 0;
22}
23EXPORT_SYMBOL(smp_call_function_single);
fa688207 24
c46fff2a 25int smp_call_function_single_async(int cpu, struct call_single_data *csd)
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26{
27 unsigned long flags;
28
29 local_irq_save(flags);
30 csd->func(csd->info);
31 local_irq_restore(flags);
08eed44c 32 return 0;
40c01e8b 33}
c46fff2a 34EXPORT_SYMBOL(smp_call_function_single_async);
40c01e8b 35
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36int on_each_cpu(smp_call_func_t func, void *info, int wait)
37{
38 unsigned long flags;
39
40 local_irq_save(flags);
41 func(info);
42 local_irq_restore(flags);
43 return 0;
44}
45EXPORT_SYMBOL(on_each_cpu);
46
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47/*
48 * Note we still need to test the mask even for UP
49 * because we actually can get an empty mask from
50 * code that on SMP might call us without the local
51 * CPU in the mask.
52 */
53void on_each_cpu_mask(const struct cpumask *mask,
54 smp_call_func_t func, void *info, bool wait)
55{
56 unsigned long flags;
57
58 if (cpumask_test_cpu(0, mask)) {
59 local_irq_save(flags);
60 func(info);
61 local_irq_restore(flags);
62 }
63}
64EXPORT_SYMBOL(on_each_cpu_mask);
65
66/*
67 * Preemption is disabled here to make sure the cond_func is called under the
68 * same condtions in UP and SMP.
69 */
70void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
71 smp_call_func_t func, void *info, bool wait,
72 gfp_t gfp_flags)
73{
74 unsigned long flags;
75
76 preempt_disable();
77 if (cond_func(0, info)) {
78 local_irq_save(flags);
79 func(info);
80 local_irq_restore(flags);
81 }
82 preempt_enable();
83}
84EXPORT_SYMBOL(on_each_cpu_cond);