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=-7.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, 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 8A354C433DB for ; Fri, 26 Feb 2021 13:47:24 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D42F064EC0 for ; Fri, 26 Feb 2021 13:47:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D42F064EC0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chrisdown.name Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 28FEE6B0005; Fri, 26 Feb 2021 08:47:23 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 241476B0006; Fri, 26 Feb 2021 08:47:23 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1563B6B006C; Fri, 26 Feb 2021 08:47:23 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0242.hostedemail.com [216.40.44.242]) by kanga.kvack.org (Postfix) with ESMTP id 0004B6B0005 for ; Fri, 26 Feb 2021 08:47:22 -0500 (EST) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id BE0039886 for ; Fri, 26 Feb 2021 13:47:22 +0000 (UTC) X-FDA: 77860545924.05.CE1035A Received: from mail-wr1-f44.google.com (mail-wr1-f44.google.com [209.85.221.44]) by imf05.hostedemail.com (Postfix) with ESMTP id 4CCD9E000123 for ; Fri, 26 Feb 2021 13:47:21 +0000 (UTC) Received: by mail-wr1-f44.google.com with SMTP id b18so2157515wrn.6 for ; Fri, 26 Feb 2021 05:47:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chrisdown.name; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=vTw5pV8CppqaFWYeiTnc7rI0doZYk4bhQx1gn2PUM+c=; b=rQwYdC4L1ZQNePU5zXmJj4yQMRJzUx75u9nGyOrtOTzEf4kcM0mqcJefmV6wmB46ig UxyjFkKq76yoz7mM854sr4iiDzvbgXSWYQeaVk2kmsJA6h7PVkE2ScDqX7mhdZv3t6t6 HYgQKCePp2o2dBRyWr2il29WE3zXnkf8Dv3u8= 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=vTw5pV8CppqaFWYeiTnc7rI0doZYk4bhQx1gn2PUM+c=; b=GblERkPmTWzgSA4guSgM5ubLuh7uyJ6PsOPfkXoEXT4vyGqqwK+WrOAkh1YLY5dW7C 1JT0lho4kpA/t2gqesdH7KO+AT8ejr3b3FyNtoiiiBbegl9IT99jg0MBxSs/EYho1Y3f gfU5CBMeU73xWAgVpiLS3M673rCm84wuwlLcyr8iQBSvmHJQ397HjaXsv5/XGn0TyHzK nR69LzWF1R8+qY8I3iDtNEO2TCFYFSHvxmiw9sSvRoi1h8UBsI7Jw4r2IaXQP67vUod8 P5bmoedLjhkWLS9H2ZdnxHTsNWW0/5kDCLZv3f4b3NTz/9WHi+MCFat7WRyfPMRO5n2R uW3A== X-Gm-Message-State: AOAM5317Y4BYa11QlKY1fab4yKFtQVKxJbqcGz81kDGDQvs5cwVJfAIi 2gG87lwldY8TPGqgYWpDyt2bdw== X-Google-Smtp-Source: ABdhPJyPIZy8UwWq69q/gkkLW4ZIRBWdSesqrIV6aqBwCubu5YLuWEdVDHMLcKWfhMLfOO/m6Jmv9g== X-Received: by 2002:adf:fe09:: with SMTP id n9mr3390807wrr.104.1614347240990; Fri, 26 Feb 2021 05:47:20 -0800 (PST) Received: from localhost ([2620:10d:c093:400::4:87b5]) by smtp.gmail.com with ESMTPSA id c11sm12808490wrs.28.2021.02.26.05.47.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Feb 2021 05:47:20 -0800 (PST) Date: Fri, 26 Feb 2021 13:47:20 +0000 From: Chris Down To: Matthew Wilcox Cc: Andrew Morton , linux-mm@kvack.org, Tony Luck , Fenghua Yu , linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com Subject: Re: [PATCH] ia64: Depend on non-static printk for cmpxchg debug Message-ID: References: <20210226130029.GC2723601@casper.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.0.5 (da5e3282) (2021-01-21) X-Stat-Signature: q7btju9ky5iz1uuxfcrjj3p1rhn18yzh X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 4CCD9E000123 Received-SPF: none (chrisdown.name>: No applicable sender policy available) receiver=imf05; identity=mailfrom; envelope-from=""; helo=mail-wr1-f44.google.com; client-ip=209.85.221.44 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1614347241-573076 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: Chris Down writes: >I must confess I have no idea of the history of why it was `extern >int` in the first place -- my fear was somehow we use cmpxchg.h from a >different context. Do you have any idea? :-) Ok, found where it's introduced in the pre-git archives: "New file asm-ia64/intrinsics.h." from David Mosberger , Dec 9 2002. No indication why it's extern, but it's been there since the dawn of ia64.