Re: [PATCH] ARM: add BUILD_BUG_ON to check if fixmap range spans multiple pmds

[Quanyang Wang]

On 10/25/21 5:44 AM, Linus Walleij wrote:
> On Wed, Oct 20, 2021 at 7:50 AM <quanyang.wang@xxxxxxxxxxxxx> wrote:
>
> > From: Quanyang Wang <quanyang.wang@xxxxxxxxxxxxx>
> >
> > Not only the early fixmap range, but also the fixmap range should be
> > checked if it spans multiple pmds. When enabling CONFIG_DEBUG_HIGHMEM,
> > some systems which contain up to 16 CPUs will crash.
> >
> > Signed-off-by: Quanyang Wang <quanyang.wang@xxxxxxxxxxxxx>
>
> Looks reasonable to me.
> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
>
> Please submit this patch into Russell's patch tracker.
Done.
https://www.armlinux.org.uk/developer/patches/viewpatch.php?id=9149/1
Thanks for the review.

> Yours,
> Linus Walleij