> On Jun 16, 2015, at 10:01 PM, 慕冬亮 <mudongliangabcd@xxxxxxxxx> wrote:
>
> I see the macro in the include/linux/sched.h
> #define __set_current_state(state_value) \
> do { current->state = (state_value); } while (0)
>
> Why define it like this? What's the meaning of while?
Read this and you will know why.
http://kernelnewbies.org/FAQ/DoWhile0
> mudongliang
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