Re: [PATCH] mm/ioremap: Probe platform for p4d huge map support

[Thomas Gleixner]

On Thu, 13 Jun 2019, Anshuman Khandual wrote:

> Finishing up what the commit c2febafc67734a ("mm: convert generic code to
> 5-level paging") started out while levelling up P4D huge mapping support
> at par with PUD and PMD. A new arch call back arch_ioremap_p4d_supported()
> is being added which just maintains status quo (P4D huge map not supported)
> on x86 and arm64.
> 
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> Cc: Andy Lutomirski <luto@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: x86@xxxxxxxxxx
> 
> Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>

Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>