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=-3.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 4C00AC4363A for ; Thu, 29 Oct 2020 01:53:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E59DF20829 for ; Thu, 29 Oct 2020 01:53:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Kf71SoUR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728733AbgJ2BxG (ORCPT ); Wed, 28 Oct 2020 21:53:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728114AbgJ1V5i (ORCPT ); Wed, 28 Oct 2020 17:57:38 -0400 Received: from mail-oi1-x22c.google.com (mail-oi1-x22c.google.com [IPv6:2607:f8b0:4864:20::22c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7094BC0613CF; Wed, 28 Oct 2020 14:57:37 -0700 (PDT) Received: by mail-oi1-x22c.google.com with SMTP id k27so1130681oij.11; Wed, 28 Oct 2020 14:57:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=o3LdnC6Ytf9c4DWqirvo5UI8m31/cCv50Msd5N5b88E=; b=Kf71SoURoZbPK+PTfpdvnSb2QDHbMtDUocxpU73Xm5V5jGamSBODV0w6lYIVnGP0nV DZ9Gdjd5BFLVfw5kKlCaR03dC5cXa8EhN79hBIChP81o6QIvCt3WeTJ6Z36GHc0sK8as 5VJGnPsXbHwajZqU3QZfdcaACxkdjVqQJrKLGa9SfKw5RFFspZAmZoqSHmkX/kLiBgKz EABafBm1gpst3U19AYutktoYC/VVn1aIk+uU147O2FzwNnThNMnyL8Mm5/HfWdxMpdFq 9CX3CfnmQZJbrmns0KcGq5/u0bTWswbBbqF5CUIduXQm+0DpA1rB7M758jtPjYrpaPdl 53JA== 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; bh=o3LdnC6Ytf9c4DWqirvo5UI8m31/cCv50Msd5N5b88E=; b=kcjA2Y8dl7sHLtKB48B6uhEuCFv0vvWaKjJBfCqdxY4pyPz9nMTjYPRT92n2nifxhQ daTwAZLgSiQvyYPn/P6Pv4+E9BpGwokZaBxEQxvi+2CTk3IQ4Sodl1SGIR1UAKJ4YL88 cxgYcHJocz/2Y4wbECpCtHthsD/93uCqOvglYKDrtWO33NASR3uP/ph6kDnIRc1+yL+9 uRxbK5tQK1BHEdWTdeu4pKkhgfN4yzaLRwurhbGHpJa530aOQRJkI4FuMBMmzn5rUL1Q CZrMZ/JzP9Hyi4oSpUAJYOnpgQL/eTkS8D/7xMmoEu6fckZ0+EdQgkY6LhtxiQxAgASa v33w== X-Gm-Message-State: AOAM533REwJUezSx/xjwCiiNere5r3p4DlYHsNsXLwI50JNCP1oVsHYN sn2wjWbKxLqIatT6FxpQAIZXiyi7YFpE X-Google-Smtp-Source: ABdhPJyMeXkxKEBeQiHyAtviwtfq3kqG2WHDNhJ1R5euCg8w4YtLIcQ7PkGZIvhWiAeQxnrwQKGzPg== X-Received: by 2002:a17:90b:4a4f:: with SMTP id lb15mr1916524pjb.103.1603863270836; Tue, 27 Oct 2020 22:34:30 -0700 (PDT) Received: from PWN (n11212042025.netvigator.com. [112.120.42.25]) by smtp.gmail.com with ESMTPSA id j20sm3771189pgl.40.2020.10.27.22.34.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Oct 2020 22:34:30 -0700 (PDT) Date: Wed, 28 Oct 2020 01:34:23 -0400 From: Peilin Ye To: Daniel Vetter Cc: Greg Kroah-Hartman , Bartlomiej Zolnierkiewicz , dri-devel , Linux Fbdev development list , Linux Kernel Mailing List Subject: Re: Following up Message-ID: <20201028053423.GA1205528@PWN> References: <20201027165021.GA1178130@PWN> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org On Tue, Oct 27, 2020 at 07:36:54PM +0100, Daniel Vetter wrote: > On Tue, Oct 27, 2020 at 5:50 PM Peilin Ye wrote: > > ...you mentioned code search, where & what should we look at, in order > > to confirm it's safe to remove them? > > Way back there was google's code search, which was awesome. Now I just > put the structure name/ioctl #define/number into > google/bing/duckduckgo and see if anything turns up. Plus check how > it's used in fb tools (although I just recently learned that fb-test > pretty much disappeared from the internet, very hard to find the > original). > > If you're unsure, we can merge a patch, then wait about 1 year for any > users to show up with problems. If that's not the case, assume they're > all gone, or it was never used and just implemented because it was > copied from somewhere else, or "just in case". There's lots of dead > uapi around. I see, it will be my next thing to do. Hopefully this will remove a lot of console_font occurrences. Peilin