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Mon, 02 Nov 2020 04:23:34 -0500 X-MC-Unique: 4rIlLjXWNA2GtVbijb8Etw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A23411074652; Mon, 2 Nov 2020 09:23:29 +0000 (UTC) Received: from [10.36.113.163] (ovpn-113-163.ams2.redhat.com [10.36.113.163]) by smtp.corp.redhat.com (Postfix) with ESMTP id CC9DF21E86; Mon, 2 Nov 2020 09:23:21 +0000 (UTC) Subject: Re: [PATCH v3 3/4] arch, mm: restore dependency of __kernel_map_pages() of DEBUG_PAGEALLOC To: Mike Rapoport , Andrew Morton References: <20201101170815.9795-1-rppt@kernel.org> <20201101170815.9795-4-rppt@kernel.org> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: <8eac2aa4-114e-f981-c8f8-ad8523175cf8@redhat.com> Date: Mon, 2 Nov 2020 10:23:20 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <20201101170815.9795-4-rppt@kernel.org> Content-Language: en-US X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201102_042340_912187_6990E5E8 X-CRM114-Status: GOOD ( 19.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , linux-mm@kvack.org, Paul Mackerras , Pavel Machek , "H. Peter Anvin" , sparclinux@vger.kernel.org, Christoph Lameter , Will Deacon , linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, Michael Ellerman , x86@kernel.org, Mike Rapoport , Christian Borntraeger , Ingo Molnar , Catalin Marinas , Len Brown , Albert Ou , Vasily Gorbik , linux-pm@vger.kernel.org, Heiko Carstens , David Rientjes , Borislav Petkov , Andy Lutomirski , Paul Walmsley , "Kirill A. Shutemov" , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, Pekka Enberg , Palmer Dabbelt , Joonsoo Kim , "Edgecombe, Rick P" , linuxppc-dev@lists.ozlabs.org, "David S. Miller" Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address, > unsigned numpages, unsigned long page_flags) > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 14e397f3752c..ab0ef6bd351d 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -2924,7 +2924,11 @@ static inline bool debug_pagealloc_enabled_static(void) > return static_branch_unlikely(&_debug_pagealloc_enabled); > } > > -#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_ARCH_HAS_SET_DIRECT_MAP) > +#ifdef CONFIG_DEBUG_PAGEALLOC > +/* > + * To support DEBUG_PAGEALLOC architecture must ensure that > + * __kernel_map_pages() never fails Maybe add here, that this implies mapping everything via PTEs during boot. Acked-by: David Hildenbrand -- Thanks, David / dhildenb _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel