2 * Uniprocessor-only support functions. The counterpart to kernel/smp.c
5 #include <linux/interrupt.h>
6 #include <linux/kernel.h>
7 #include <linux/export.h>
10 int smp_call_function_single(int cpu
, void (*func
) (void *info
), void *info
,
17 local_irq_save(flags
);
19 local_irq_restore(flags
);
23 EXPORT_SYMBOL(smp_call_function_single
);
25 int on_each_cpu(smp_call_func_t func
, void *info
, int wait
)
29 local_irq_save(flags
);
31 local_irq_restore(flags
);
34 EXPORT_SYMBOL(on_each_cpu
);
37 * Note we still need to test the mask even for UP
38 * because we actually can get an empty mask from
39 * code that on SMP might call us without the local
42 void on_each_cpu_mask(const struct cpumask
*mask
,
43 smp_call_func_t func
, void *info
, bool wait
)
47 if (cpumask_test_cpu(0, mask
)) {
48 local_irq_save(flags
);
50 local_irq_restore(flags
);
53 EXPORT_SYMBOL(on_each_cpu_mask
);
56 * Preemption is disabled here to make sure the cond_func is called under the
57 * same condtions in UP and SMP.
59 void on_each_cpu_cond(bool (*cond_func
)(int cpu
, void *info
),
60 smp_call_func_t func
, void *info
, bool wait
,
66 if (cond_func(0, info
)) {
67 local_irq_save(flags
);
69 local_irq_restore(flags
);
73 EXPORT_SYMBOL(on_each_cpu_cond
);
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