From patchwork Tue Sep 24 10:51:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pankaj Bharadiya X-Patchwork-Id: 11158451 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9936B1747 for ; Tue, 24 Sep 2019 11:12:49 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 0309C2146E for ; Tue, 24 Sep 2019 11:12:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0309C2146E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-16915-patchwork-kernel-hardening=patchwork.kernel.org@lists.openwall.com Received: (qmail 32261 invoked by uid 550); 24 Sep 2019 11:11:43 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Delivered-To: mailing list kernel-hardening@lists.openwall.com Delivered-To: moderator for kernel-hardening@lists.openwall.com Received: (qmail 5212 invoked from network); 24 Sep 2019 10:58:42 -0000 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,543,1559545200"; d="scan'208";a="188422022" From: Pankaj Bharadiya To: pankaj.bharadiya@gmail.com, andriy.shevchenko@linux.intel.com, kernel-hardening@lists.openwall.com, keescook@chromium.org, akpm@linux-foundation.org, mayhs11saini@gmail.com Cc: pankaj.laxminarayan.bharadiya@intel.com Subject: [PATCH 1/5] linux/kernel.h: Add sizeof_member macro Date: Tue, 24 Sep 2019 16:21:10 +0530 Message-Id: <20190924105114.110535-2-pankaj.laxminarayan.bharadiya@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190924105114.110535-1-pankaj.laxminarayan.bharadiya@intel.com> References: <20190924105114.110535-1-pankaj.laxminarayan.bharadiya@intel.com> At present we have 3 different macros to calculate the size of a member of a struct: - SIZEOF_FIELD - FIELD_SIZEOF - sizeof_field To bring uniformity in entire kernel source tree let's add sizeof_member macro. Replace all occurrences of above 3 macro's with sizeof_member in future patches. Signed-off-by: Pankaj Bharadiya --- include/linux/kernel.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 4fa360a13c1e..0b80d8bb3978 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -79,6 +79,15 @@ */ #define round_down(x, y) ((x) & ~__round_mask(x, y)) +/** + * sizeof_member - get the size of a struct's member + * @T: the target struct + * @m: the target struct's member + * Return: the size of @m in the struct definition without having a + * declared instance of @T. + */ +#define sizeof_member(T, m) (sizeof(((T *)0)->m)) + /** * FIELD_SIZEOF - get the size of a struct's field * @t: the target struct