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If you do smp_call_function_single(expression-with-side-effects, ...) then expression-with-side-effects never gets evaluated on UP builds. As always, implementing it in C is the correct thing to do. While we're there, uninline it for size and possible header dependency reasons. And create a new kernel/up.c, as a place in which to put uniprocessor-specific code and storage. It should mirror kernel/smp.c. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
18 lines
384 B
C
18 lines
384 B
C
/*
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* Uniprocessor-only support functions. The counterpart to kernel/smp.c
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/smp.h>
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int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
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int wait)
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{
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WARN_ON(cpuid != 0);
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local_irq_disable();
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(func)(info);
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local_irq_enable();
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return 0;
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}
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EXPORT_SYMBOL(smp_call_function_single);
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