Messages in this thread | | | Date | Fri, 24 Mar 2017 11:58:14 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 4/6] x86/kasan: Prepare clear_pgds() to switch to <asm-generic/pgtable-nop4d.h> |
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* Kirill A. Shutemov <kirill@shutemov.name> wrote:
> On Wed, Mar 22, 2017 at 08:31:36AM +0100, Ingo Molnar wrote: > > * Andrey Ryabinin <aryabinin@virtuozzo.com> wrote: > > > On 03/17/2017 09:55 PM, Kirill A. Shutemov wrote: > > > > With folded p4d, pgd_clear() is nop. Change clear_pgds() to use > > > > p4d_clear() instead. > > > > > > > > > > You could probably just use set_pgd(pgd_offset_k(start), __pgd(0)); instead of pgd_clear() > > > as we already do in arm64. > > > It's basically pgd_clear() except it's not a nop wih p4d folded. > > > > Makes sense. Kirill, if you agree, mind spinning a v2 patch? > > I can re-spin, if you want. But honestly, I don't think such constructs > help readability.
Good point - I'll keep it as-is unless convinced otherwise.
Thanks,
Ingo
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