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[217.140.101.70]) by mx.google.com with ESMTP id k52si1623970edd.233.2019.02.18.06.19.34 for ; Mon, 18 Feb 2019 06:19:34 -0800 (PST) Received-SPF: pass (google.com: domain of steven.price@arm.com designates 217.140.101.70 as permitted sender) client-ip=217.140.101.70; Authentication-Results: mx.google.com; spf=pass (google.com: domain of steven.price@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=steven.price@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B64AF15AB; Mon, 18 Feb 2019 06:19:33 -0800 (PST) Received: from [10.1.196.69] (e112269-lin.cambridge.arm.com [10.1.196.69]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 770F73F589; Mon, 18 Feb 2019 06:19:15 -0800 (PST) Subject: Re: [PATCH 03/13] mm: Add generic p?d_large() macros To: Peter Zijlstra Cc: x86@kernel.org, Arnd Bergmann , Ard Biesheuvel , Catalin Marinas , kirill@shutemov.name, Dave Hansen , Will Deacon , linux-kernel@vger.kernel.org, linux-mm@kvack.org, =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Ingo Molnar , Borislav Petkov , Andy Lutomirski , "H. Peter Anvin" , James Morse , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, kan.liang@linux.intel.com References: <20190215170235.23360-1-steven.price@arm.com> <20190215170235.23360-4-steven.price@arm.com> <20190218113134.GU32477@hirez.programming.kicks-ass.net> From: Steven Price Message-ID: Date: Mon, 18 Feb 2019 14:19:14 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 In-Reply-To: <20190218113134.GU32477@hirez.programming.kicks-ass.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit 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 18/02/2019 11:31, Peter Zijlstra wrote: > On Fri, Feb 15, 2019 at 05:02:24PM +0000, Steven Price wrote: >> From: James Morse >> >> Exposing the pud/pgd levels of the page tables to walk_page_range() means >> we may come across the exotic large mappings that come with large areas >> of contiguous memory (such as the kernel's linear map). >> >> For architectures that don't provide p?d_large() macros, provided a >> does nothing default. > > Kan was going to fix that for all archs I think.. The latest series I can find from Kan is still x86 specific. I'm happy to rebase onto something else if Kan has an implementation already (please point me in the right direction). Otherwise Kan is obviously free to base on these changes. Steve > See: > > http://lkml.kernel.org/r/20190204105409.GA17550@hirez.programming.kicks-ass.net > >> Signed-off-by: James Morse >> Signed-off-by: Steven Price >> --- >> include/asm-generic/pgtable.h | 10 ++++++++++ >> 1 file changed, 10 insertions(+) >> >> diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h >> index 05e61e6c843f..7630d663cd51 100644 >> --- a/include/asm-generic/pgtable.h >> +++ b/include/asm-generic/pgtable.h >> @@ -1186,4 +1186,14 @@ static inline bool arch_has_pfn_modify_check(void) >> #define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) >> #endif >> >> +#ifndef pgd_large >> +#define pgd_large(x) 0 >> +#endif >> +#ifndef pud_large >> +#define pud_large(x) 0 >> +#endif >> +#ifndef pmd_large >> +#define pmd_large(x) 0 >> +#endif >> + >> #endif /* _ASM_GENERIC_PGTABLE_H */ >> -- >> 2.20.1 >> > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >