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Shutemov" To: Steven Price Cc: linux-mm@kvack.org, Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?utf-8?B?SsOpcsO0bWU=?= Glisse , Peter Zijlstra , Thomas Gleixner , Will Deacon , x86@kernel.org, "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , "Liang, Kan" , Tony Luck , Fenghua Yu , linux-ia64@vger.kernel.org Subject: Re: [PATCH v3 08/34] ia64: mm: Add p?d_large() definitions Message-ID: <20190301215728.nk7466zohdlgelcb@kshutemo-mobl1> References: <20190227170608.27963-1-steven.price@arm.com> <20190227170608.27963-9-steven.price@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190227170608.27963-9-steven.price@arm.com> User-Agent: NeoMutt/20180716 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Feb 27, 2019 at 05:05:42PM +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 ia64 leaf entries are always at the lowest level, so implement > stubs returning 0. Are you sure about this? I see pte_mkhuge defined for ia64 and Kconfig contains hugetlb references. -- Kirill A. Shutemov