On 15/05/06, Rajat Jain <rajat.noida.india@xxxxxxxxx> wrote:
Hi,
I'm asking a pretty amateur question.
I've come accross code like this huge number of times in the kernel:
#define __set_task_state(tsk, state_value) \
do { (tsk)->state = (state_value); } while (0)
What is the reason to use do while loop if it is only meant to be
executed just once? Why not a simple:
#define __set_task_state(tsk, state_value) \
{ (tsk)->state = (state_value); }
http://www.kernelnewbies.org/FAQ/DoWhile0
--
Jesper Juhl <jesper.juhl@xxxxxxxxx>
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
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