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i386: Allow smp_call_function_single() to current cpu

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This removes the requirement for callers to get_cpu() to check in simple
cases.

Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-07-09 17:11:49 +03:00
parent 4055551bbc
commit de48935391
1 changed files with 5 additions and 3 deletions
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8
arch/i386/kernel/smpcommon.c
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@ -47,7 +47,7 @@ int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
EXPORT_SYMBOL(smp_call_function);
/**
* smp_call_function_single - Run a function on another CPU
* smp_call_function_single - Run a function on a specific CPU
* @cpu: The target CPU. Cannot be the calling CPU.
* @func: The function to run. This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to the function.
@ -66,9 +66,11 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
int ret;
int me = get_cpu();
if (cpu == me) {
WARN_ON(1);
local_irq_disable();
func(info);
local_irq_enable();
put_cpu();
return -EBUSY;
return 0;
}
ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);