[PATCH 5/7] pid: Implement pid_nr

[jengelh at linux01.gwdg.de (Jan Engelhardt)]

>> +static inline pid_t pid_nr(struct pid *pid)
>> +{
>> +       pid_t nr = 0;
>> +       if (pid)
>> +               nr = pid->nr;
>> +       return nr;
>> +} 
>
>When is it valid to be passing around a NULL 'struct pid *'?

Is 0 even the right thing to return in the rare case that pid == NULL?
-1 maybe?


Jan Engelhardt
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