Re: For review: documentation of clone3() system call

* Christian Brauner:

@Florian, do you have an opinion about always passing the stack from the
lowest address with clone3()?

Do you mean that the stack extends from stack to stack_size?  I guess
that makes sense.  What about architectures which need two stacks (I
think ia64 is one)?

There is also the matter whose responsibility is the alignment of the
initial stack pointer.

Thanks,
Florian