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