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=-5.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 B2BC5C28CC0 for ; Wed, 29 May 2019 19:07:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8791A240D9 for ; Wed, 29 May 2019 19:07:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="oMbzJCif" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726576AbfE2THZ (ORCPT ); Wed, 29 May 2019 15:07:25 -0400 Received: from mail-wr1-f48.google.com ([209.85.221.48]:33681 "EHLO mail-wr1-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725914AbfE2THZ (ORCPT ); Wed, 29 May 2019 15:07:25 -0400 Received: by mail-wr1-f48.google.com with SMTP id d9so2562187wrx.0 for ; Wed, 29 May 2019 12:07:24 -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:mime-version:content-disposition :user-agent; bh=EMWVHKNLHJx2k009VtfJGPtw/+7rslOuZN+Hf86IYNE=; b=oMbzJCifRpQVEckVfOqfk25Etld5Z+FILaN45WsutdB4pRyFc7+Ag/VqkrwNMDdbIE TL11PGkir1WFM0tr/P1lVLRmAZ36IiMGWOSKYGdFBBpPNjzvRHRV5o3bacBPz4E/2mO1 ht+A2P1bMpRaa76vY4hBi4rNkBvV59dmQAISJT1mt3gBU+gjWZX+r3hV+uwQ0s6HkQ36 NhEzGaoigQsIse4Vsep7FAfJlE8/PO25FXVUCe64rWBw1IGj3LGFwQ+vRioikTnkjlU9 2hwX8t5sCoSZMbIJJ+7RFrJCNCEv9dJRTZLxh5qOtMXckLhzw6ADCggrI6HbN8FzNBLd mUyg== 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:mime-version :content-disposition:user-agent; bh=EMWVHKNLHJx2k009VtfJGPtw/+7rslOuZN+Hf86IYNE=; b=i7fz2Nf6LvOMzbpwJyqtH3ZockzXqHQHD/xkEkQF0LJCfqN397AwQysWTRjaLqF70b RcULhsEt6eC41xzhoG93+cyvMmh8bqEVI2jo8DJ52p3pArA1lCYOoEqSSFa3GfWWbL+v pHrSyegXGSV6dt1fIuBjdVslsDEY4ksgUm3u5Of+y4NuPP3dBmtyZKia/tIqzXPurRp8 0wi3ya8DUu9gLFL4IXRwPs08mkOKWe31Y1XPXlo6oFysQBURbD7YDi2c9m7qDMjydF/9 H5kTT3Ckedgt92fUsj4f1azIUMqdr/VgY7Ga5j0As/bTRQcYWlknUys4eUvUu6qo1e2X dSpA== X-Gm-Message-State: APjAAAWuzUpTj/UTCgPDAwNOvCqfaZRiKDYB81eWWyVtSQ/nXEoGaZWQ F8SceGiq0HIhfwceFPKtLJsgeZw= X-Google-Smtp-Source: APXvYqz8s4LdTieo3+BWpXylqtpo3ruD5HCbmGBaAYvUdm4j6KseHFnT0lB8r0AqwfB8c1hkz/Rhqg== X-Received: by 2002:a5d:63cb:: with SMTP id c11mr12878095wrw.65.1559156843540; Wed, 29 May 2019 12:07:23 -0700 (PDT) Received: from avx2 ([46.53.251.224]) by smtp.gmail.com with ESMTPSA id s62sm195648wmf.24.2019.05.29.12.07.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 29 May 2019 12:07:22 -0700 (PDT) Date: Wed, 29 May 2019 22:07:20 +0300 From: Alexey Dobriyan To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 1/2] add typeof_member() macro Message-ID: <20190529190720.GA5703@avx2> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add typeof_member() macro so that types can be exctracted without introducing dummy variables. Signed-off-by: Alexey Dobriyan --- include/linux/kernel.h | 2 ++ 1 file changed, 2 insertions(+) --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -88,6 +88,8 @@ */ #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) +#define typeof_member(T, m) typeof(((T*)0)->m) + #define DIV_ROUND_UP __KERNEL_DIV_ROUND_UP #define DIV_ROUND_DOWN_ULL(ll, d) \