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Date: Sat, 2 Mar 2019 00:48:51 +0300 From: "Kirill A. Shutemov" <kirill@...temov.name> To: Steven Price <steven.price@....com> Cc: linux-mm@...ck.org, Andy Lutomirski <luto@...nel.org>, Ard Biesheuvel <ard.biesheuvel@...aro.org>, Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>, Catalin Marinas <catalin.marinas@....com>, Dave Hansen <dave.hansen@...ux.intel.com>, Ingo Molnar <mingo@...hat.com>, James Morse <james.morse@....com>, Jérôme Glisse <jglisse@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, Will Deacon <will.deacon@....com>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Mark Rutland <Mark.Rutland@....com>, "Liang, Kan" <kan.liang@...ux.intel.com>, Mark Salter <msalter@...hat.com>, Aurelien Jacquiot <jacquiot.aurelien@...il.com>, linux-c6x-dev@...ux-c6x.org Subject: Re: [PATCH v3 05/34] c6x: mm: Add p?d_large() definitions On Wed, Feb 27, 2019 at 05:05:39PM +0000, Steven Price wrote: > walk_page_range() is going to be allowed to walk page tables other than > those of user space. For this it needs to know when it has reached a > 'leaf' entry in the page tables. This information is provided by the > p?d_large() functions/macros. > > For c6x there's no MMU so there's never a large page, so just add stubs. Other option would be to provide the stubs via generic headers form !MMU. -- Kirill A. Shutemov
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