> Hi, I was having a tour in the kernel sources and I found some codes
> that I can't understand why. Like this in ppp:
>
> int
> ppp_init (struct device *dev)
> {
> static int first_time = 1; <== define to 1
> int answer = 0;
^^^^^^^^^^^^^^^^^^^
static defined here!! look at a C programming Refrence.
>
>
> if (first_time) { <== check if is 1, why ? any special special reason?
>
the first time this function be called , it is first=1 setted by the definition
above. And the second time the function be called , first_time=0 setted below.
> first_time = 0;
> answer = ppp_first_time();
> if (answer == 0)
> (void) register_symtab (&ppp_syms);
> }
> if (answer == 0)
> answer = -ENODEV;
> return answer;
> }
>
> I found many more codes like this in the source, I cant remeber where anymore.
Kevin Xie.
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