diff options
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index b76763189752..06d574e42c72 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -238,15 +238,22 @@ int smp_call_function_single(int cpu, smp_call_func_t func, void *info, EXPORT_SYMBOL(smp_call_function_single); /** - * __smp_call_function_single(): Run a function on a specific CPU + * smp_call_function_single_async(): Run an asynchronous function on a + * specific CPU. * @cpu: The CPU to run on. * @csd: Pre-allocated and setup data structure * - * Like smp_call_function_single(), but allow caller to pass in a - * pre-allocated data structure. Useful for embedding @data inside - * other structures, for instance. + * Like smp_call_function_single(), but the call is asynchonous and + * can thus be done from contexts with disabled interrupts. + * + * The caller passes his own pre-allocated data structure + * (ie: embedded in an object) and is responsible for synchronizing it + * such that the IPIs performed on the @csd are strictly serialized. + * + * NOTE: Be careful, there is unfortunately no current debugging facility to + * validate the correctness of this serialization. */ -int __smp_call_function_single(int cpu, struct call_single_data *csd) +int smp_call_function_single_async(int cpu, struct call_single_data *csd) { int err = 0; @@ -256,7 +263,7 @@ int __smp_call_function_single(int cpu, struct call_single_data *csd) return err; } -EXPORT_SYMBOL_GPL(__smp_call_function_single); +EXPORT_SYMBOL_GPL(smp_call_function_single_async); /* * smp_call_function_any - Run a function on any of the given cpus |