Re: [PATCH] MIPS: fix memory reservation for non-usermem setups

Ilya Lipnitskiy
2021-03-17T05:11:29Z

Hi Thomas,

On Fri, Mar 12, 2021 at 7:19 AM Thomas Bogendoerfer
<tsbogend@alpha.franken.de> wrote:
>
> On Sun, Mar 07, 2021 at 11:40:30AM -0800, Ilya Lipnitskiy wrote:
> > From: Tobias Wolf <dev-NTEO@vplace.de>
> >
> > Commit 67a3ba25aa95 ("MIPS: Fix incorrect mem=X@Y handling") introduced a new
> > issue for rt288x where "PHYS_OFFSET" is 0x0 but the calculated "ramstart" is
> > not. As the prerequisite of custom memory map has been removed, this results
> > in the full memory range of 0x0 - 0x8000000 to be marked as reserved for this
> > platform.
>
> and where is the problem here ?
Turns out this was already attempted to be upstreamed - not clear why
it wasn't merged. Context:
https://lore.kernel.org/linux-mips/6504517.U6H5IhoIOn@loki/

I hope the thread above helps you understand the problem.

>
> Thomas.
>
> --
> Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
> good idea. [ RFC1925, 2.3 ]
Ilya