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Commit | Line | Data |
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53ce3d95 AM |
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> |
53ce3d95 AM |
8 | #include <linux/smp.h> |
9 | ||
10 | int smp_call_function_single(int cpu, void (*func) (void *info), void *info, | |
11 | int wait) | |
12 | { | |
081192b2 DD |
13 | unsigned long flags; |
14 | ||
93423b86 IM |
15 | WARN_ON(cpu != 0); |
16 | ||
081192b2 DD |
17 | local_irq_save(flags); |
18 | func(info); | |
19 | local_irq_restore(flags); | |
93423b86 | 20 | |
53ce3d95 AM |
21 | return 0; |
22 | } | |
23 | EXPORT_SYMBOL(smp_call_function_single); | |
fa688207 DD |
24 | |
25 | /* | |
26 | * Note we still need to test the mask even for UP | |
27 | * because we actually can get an empty mask from | |
28 | * code that on SMP might call us without the local | |
29 | * CPU in the mask. | |
30 | */ | |
31 | void on_each_cpu_mask(const struct cpumask *mask, | |
32 | smp_call_func_t func, void *info, bool wait) | |
33 | { | |
34 | unsigned long flags; | |
35 | ||
36 | if (cpumask_test_cpu(0, mask)) { | |
37 | local_irq_save(flags); | |
38 | func(info); | |
39 | local_irq_restore(flags); | |
40 | } | |
41 | } | |
42 | EXPORT_SYMBOL(on_each_cpu_mask); | |
43 | ||
44 | /* | |
45 | * Preemption is disabled here to make sure the cond_func is called under the | |
46 | * same condtions in UP and SMP. | |
47 | */ | |
48 | void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info), | |
49 | smp_call_func_t func, void *info, bool wait, | |
50 | gfp_t gfp_flags) | |
51 | { | |
52 | unsigned long flags; | |
53 | ||
54 | preempt_disable(); | |
55 | if (cond_func(0, info)) { | |
56 | local_irq_save(flags); | |
57 | func(info); | |
58 | local_irq_restore(flags); | |
59 | } | |
60 | preempt_enable(); | |
61 | } | |
62 | EXPORT_SYMBOL(on_each_cpu_cond); |