void *
percpu_getref(percpu_t *pc)
{
KPREEMPT_DISABLE(curlwp);
return percpu_getptr_remote(pc, curcpu());
}
void *
percpu_getref(percpu_t *pc)
{
kpreempt_disable();
return percpu_getptr_remote(pc, curcpu());
}
/*
* percpu_foreach: call the specified callback function for each cpus.
*
* => called in thread context.
* => caller should not rely on the cpu iteration order.
* => the callback function should be minimum because it is executed with
* holding a global lock, which can block low-priority xcalls.
* eg. it's illegal for a callback function to sleep for memory allocation.
*/
void
percpu_foreach(percpu_t *pc, percpu_callback_t cb, void *arg)
{
CPU_INFO_ITERATOR cii;
struct cpu_info *ci;
percpu_traverse_enter();
for (CPU_INFO_FOREACH(cii, ci)) {
(*cb)(percpu_getptr_remote(pc, ci), arg, ci);
}
percpu_traverse_exit();
}