vm_area at addr ffffffffc0800000 is not marked as VM_IOREMAP

[Alexei Starovoitov]

On Fri, Mar 8, 2024 at 9:24 AM Christoph Hellwig <hch at infradead.org> wrote:
>
> On Fri, Mar 08, 2024 at 09:20:24AM -0800, Alexei Starovoitov wrote:
> > ok. Like the attached patch?
>
> Looks sensibe, but I think the powerpc callers of ioremap_page_range
> will need the same treatment.

Good point. Only one of the callers in arch/powerpc needs adjusting.
Found few other similar arch users.
See attached patch.

ioremap_page() in arch/arm/mm/ioremap.c is an interesting case.
It is EXPORT_SYMBOL, but there are no in-tree users.
I think we shouldn't apply checks to it,
since some out-of-tree module may fail.
I have no arm boards to test, I suggest we play safe than sorry.
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