[PATCH 5/7] pid: Implement pid_nr

[haveblue at us.ibm.com (Dave Hansen)]

On Tue, 2006-08-15 at 12:23 -0600, Eric W. Biederman wrote:
> +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 *'?

-- Dave