Re: [RFC PATCH v3 4/7] powerpc: regain entire stack space

[Nicholas Piggin]

On Wed, 3 Oct 2018 07:52:59 +0200
Christophe LEROY <christophe.leroy@xxxxxx> wrote:

> Le 03/10/2018 Ã 07:34, Nicholas Piggin a ÃcritÂ:
> > On Mon,  1 Oct 2018 12:30:25 +0000 (UTC)
> > Christophe Leroy <christophe.leroy@xxxxxx> wrote:
> >   
> >> thread_info is not anymore in the stack, so the entire stack
> >> can now be used.  
> > 
> > Nice.
> >   
> >>
> >> In the meantime, all pointers to the stacks are not anymore
> >> pointers to thread_info so this patch changes them to void*  
> > 
> > Wasn't this previously effectively already the case with patch
> > 3/7? You had thread_info sized space left there, but it was not
> > used or initialized right? Does it make sense to move this part
> > of it to the previous patch?  
> 
> Not really.
> 
> In 3/7 I changed the prototypes of two functions that really used the 
> pointer as a task pointer only.
> 
> Here it change things that before 4/7 were really used as both stack 
> pointers and thread_info pointers.

What uses it as a thread_info pointer? It seems more like a stack
with some amount of unused space in it but that's all.

That said I don't care to nitpick too much where things go exactly
if you like it better here that's fine.

Thanks,
Nick