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 __smp_call_function_single(int cpu
, struct call_single_data
*csd
,
30 local_irq_save(flags
);
32 local_irq_restore(flags
);
35 EXPORT_SYMBOL(__smp_call_function_single
);
37 int on_each_cpu(smp_call_func_t func
, void *info
, int wait
)
41 local_irq_save(flags
);
43 local_irq_restore(flags
);
46 EXPORT_SYMBOL(on_each_cpu
);
49 * Note we still need to test the mask even for UP
50 * because we actually can get an empty mask from
51 * code that on SMP might call us without the local
54 void on_each_cpu_mask(const struct cpumask
*mask
,
55 smp_call_func_t func
, void *info
, bool wait
)
59 if (cpumask_test_cpu(0, mask
)) {
60 local_irq_save(flags
);
62 local_irq_restore(flags
);
65 EXPORT_SYMBOL(on_each_cpu_mask
);
68 * Preemption is disabled here to make sure the cond_func is called under the
69 * same condtions in UP and SMP.
71 void on_each_cpu_cond(bool (*cond_func
)(int cpu
, void *info
),
72 smp_call_func_t func
, void *info
, bool wait
,
78 if (cond_func(0, info
)) {
79 local_irq_save(flags
);
81 local_irq_restore(flags
);
85 EXPORT_SYMBOL(on_each_cpu_cond
);