Why the PF_SUPERPRIV flag is cleared?

[Parmenides]

> This flag PF_SUPERPRI, indicates used superuser privileges and not use
> superuser privileges.
I get it. This is really a misunderstanding. Thanks a lot.

2011/9/8 rohan puri <rohan.puri15 at gmail.com>:
> Hi,
>
>     When forking a child process, the copy_process() function will by
> default clear the PF_SUPERPRIV flag, which indicates whether a process
> use superuser privileges. That means a  superuser process will create
> a child process does not has superuser privileges. I think the child
> process of a superuser process should also be a superuser one, while
> the child process of a normal process by default should also be a
> normal one (except that the setuid bit of the child executable is turn
> on). In both cases it is not necessary that the PF_SUPERPRIV flag to
> be cleared.  So, I wonder why the PF_SUPERPRIV flag is cleared by
> defult.
>
>
> Hi,
>
> This flag PF_SUPERPRI, indicates used superuser privileges and not use
> superuser privileges. Which in any case, INDEPENDENT of all the processes
> which have superuser privileges, whether they had used them or not and for
> those processes which do not have superuser privileges needs to be cleared
> for the child of them (since the child process has been just created and at
> this point in time it has not used the superuser privileges) Its a kind of
> initialization you can think of.
>
> Regards,
> Rohan.
>