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[209.132.180.67]) by mx.google.com with ESMTP id l8si2755464oii.249.2020.01.11.02.36.42; Sat, 11 Jan 2020 02:36:53 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=bd++4M9Y; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731202AbgAKKfw (ORCPT + 99 others); Sat, 11 Jan 2020 05:35:52 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:42495 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728861AbgAKKfw (ORCPT ); Sat, 11 Jan 2020 05:35:52 -0500 Received: by mail-pf1-f195.google.com with SMTP id 4so2403838pfz.9 for ; Sat, 11 Jan 2020 02:35:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=2td1h3C8GfYA2cMzdn9SMLDmT5nhRRi2kbKs4hQRobg=; b=bd++4M9YYDiSV07yTNggKok9KGoJkQ2oVZM1zvijXTKQXgLBseiahwBgw08PIDQT/3 LcUEIDGBYETQZ1MMhlyitkmQUGHVu/wkDbtwlRn0e39+qLrXQZhv9RsaoujkYjaakxUg ScwnZk+7TU+3C525Oqyvdd/qcp4rSSyZEQ6PeFF/dPhsoXE9OCHw7pMwQILtx+Ruooia FmJC4qotLotY5exrVYy6iuSBxFRLBorbAWeJ4F6i0H0AQKo8j9Ikz3w3sX4+XkiidSz6 P/ZF/7tk+G73eYI5ojNzt8a1wtIFv8j/5vVGZ/q79VNtxMiK3gYX83ZcihnzB82u+2Fm xlvQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=2td1h3C8GfYA2cMzdn9SMLDmT5nhRRi2kbKs4hQRobg=; b=YXvyisW+1r5hV+33+9BzYH6H19zBHbN34/rtswA1hdpwlKISoReZ+yWzq/4FBNEyRk XubBEjaFhsQ7mUSUeTYbS6PJ461fX3RoPgV55FwXwMKH6Fdk7B+1m1yGRNaMso+Piyw0 koax0cCvdyd7FIj9ir8H/2RAoEdS6XXwKy2BWwg2H5TK382vMEmf6SBu4L3nmelXaTQk Gyk2vrF8YFJBy5QAN/C4Tfcvs1/ffVGpwmkGPIS4tT642s6iNFYcEl2NBpivramoRQOh 5pfwa5J6Ip8U1UjyjiYeRrBFzW9wXXtg/HgKRr2GkmByebH4fCdvboXqODl+syH6My8J hzbg== X-Gm-Message-State: APjAAAU5PeWML0UJbKlrSbkJNFNoK6hfrtycE4DkXg1mf5LcwM8Jcw6O 6OM68aWPH4mvB/jrmHXeD8/aeS/OuTIdF3oxTYw= X-Received: by 2002:a65:5242:: with SMTP id q2mr9988753pgp.74.1578738951304; Sat, 11 Jan 2020 02:35:51 -0800 (PST) MIME-Version: 1.0 References: <20200110225602.91663-1-samitolvanen@google.com> <202001110830.00B8USV0024843@sdf.org> In-Reply-To: <202001110830.00B8USV0024843@sdf.org> From: Andy Shevchenko Date: Sat, 11 Jan 2020 12:35:39 +0200 Message-ID: Subject: Re: [PATCH] lib/list_sort: fix function type mismatches To: George Spelvin Cc: samitolvanen@google.com, Andrew Morton , Andy Shevchenko , Kees Cook , Linux Kernel Mailing List , Rasmus Villemoes , Mauro Carvalho Chehab , Andrey Abramov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jan 11, 2020 at 10:31 AM George Spelvin wrote: > > > typedef int __attribute__((nonnull(2,3))) (*cmp_func)(void *, > > - struct list_head const *, struct list_head const *); > > + struct list_head *, struct list_head *); > > I'd prefer to leave the const there for documentation. Not only. It's useful to show that we are not going to change those parameters. > Does anyone object to fixing it in the other direction by *adding* > const to all the call sites? Agree. Actually we have cmp_r_funct_t which might be used here (I didn't check for the possibility, though). > > Andy Shevchenko posted a patch last 7 October that did that. > <20191007135656.37734-1-andriy.shevchenko@linux.intel.com> > > (You could also try taking a second look at why __pure doesn't work, > per AKPM's message of 16 April > <20190416154522.65aaa348161fc581181b56d9@linux-foundation.org>) Hint: When you post Message-Id you may prefix them with https://lore.kernel.org/r/ which makes search a bit more convenient and faster. -- With Best Regards, Andy Shevchenko