From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=3.0 tests=MAILING_LIST_MULTI, PDS_TONAME_EQ_TOLOCAL_SHORT,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E251C33CB1 for ; Fri, 17 Jan 2020 06:28:18 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 49FA720748 for ; Fri, 17 Jan 2020 06:28:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 49FA720748 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id DA3F16B031F; Fri, 17 Jan 2020 01:28:17 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D7C766B0320; Fri, 17 Jan 2020 01:28:17 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C6AC96B0321; Fri, 17 Jan 2020 01:28:17 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0191.hostedemail.com [216.40.44.191]) by kanga.kvack.org (Postfix) with ESMTP id B08786B031F for ; Fri, 17 Jan 2020 01:28:17 -0500 (EST) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 78E2A180AD811 for ; Fri, 17 Jan 2020 06:28:17 +0000 (UTC) X-FDA: 76386146634.02.metal62_48575d892fe1b X-HE-Tag: metal62_48575d892fe1b X-Filterd-Recvd-Size: 2900 Received: from mail-wr1-f68.google.com (mail-wr1-f68.google.com [209.85.221.68]) by imf13.hostedemail.com (Postfix) with ESMTP for ; Fri, 17 Jan 2020 06:28:17 +0000 (UTC) Received: by mail-wr1-f68.google.com with SMTP id w15so21545524wru.4 for ; Thu, 16 Jan 2020 22:28:16 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=vvF3fPu42sSx+4imIXkbIazKn6wGHRrvMJiDBLGJfPw=; b=UUNl6xvO9Wr4RP9ICipuh4b+2NFr6OzAADFfHLUamdiylbftW6S08ZZ7aBLuKO6cJy TLhKZictqNlVMCOWmJb7kdsrSRlYGSVz5VtoMQItaf0niq4INUSIuhErnvk7c7Gyoi3V FgFRDsZlMKubENCPfxVfLPaMaxRxYLAWRq1oXZIq5Oqpwd3Qnwi+4MCoHTEkWKgq1etq +hl45+Ee8x2xkE535aTtixC5TUS5raHNim29bw4tijg1is+dqTvWekU7u6qRlOd8ktq+ fbg+F8k5E+uYq3w9CcCXmzvixat6uxPta7wKSqnqD5IoLeoItmUSVMcpM4oOWJj5ML+Q EVHA== X-Gm-Message-State: APjAAAUVJEeWacXMcppFWz1pnIV2tTLF0ML9u/ZgWlsk4Bp7V3WsXwGb OvnfzZ5yC46hUNiIVeMJc2E= X-Google-Smtp-Source: APXvYqwkZAR+jobw5u5vprLmpyWrVp8F0lhzB2GzsxGpJhiiei7yRMXMC6rKBJkshfqkczDtHNb/5Q== X-Received: by 2002:adf:f484:: with SMTP id l4mr1321649wro.207.1579242495892; Thu, 16 Jan 2020 22:28:15 -0800 (PST) Received: from localhost (ip-37-188-146-105.eurotel.cz. [37.188.146.105]) by smtp.gmail.com with ESMTPSA id g25sm1700029wmh.3.2020.01.16.22.28.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Jan 2020 22:28:14 -0800 (PST) Date: Fri, 17 Jan 2020 07:28:13 +0100 From: Michal Hocko To: "buddy.zhang" Cc: "akpm@linux-foundation.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] mm/cma.c: find a named CMA area by name Message-ID: <20200117062813.GE19428@dhcp22.suse.cz> References: <20200116101322.17795-1-buddy.zhang@aliyun.com> <20200116121240.GS19428@dhcp22.suse.cz> <6EE060CC-A19D-4F9D-BE36-14CB20C44AE2@aliyun.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6EE060CC-A19D-4F9D-BE36-14CB20C44AE2@aliyun.com> User-Agent: Mutt/1.12.2 (2019-09-21) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000011, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri 17-01-20 10:16:46, buddy.zhang wrote: [...] > So, if device want to use a special named CMA area on module, > "cma_find_by_name()" need export symbols. My question was whether there actually is any device that would like to use this functionality. Your patch doesn't add any and there is no reference to any either. We do not add exports for the functionality which is not used in the tree. -- Michal Hocko SUSE Labs