Roland Dreier wrote:
I don't see any documented restrictions about preemption being disabled when this function is called, but...> +int on_one_cpu(int cpu, void (*func) (void *info), void *info, > + int retry, int wait) > +{ > + int ret; > + int this_cpu; > + > + this_cpu = get_cpu(); what if a preempt and reschedule to a different CPU happens right here, after this_cpu is set? > + if (this_cpu == cpu) {
get_cpu() disables preemption (the return value would be meaningless otherwise).
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