From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 09 Dec 2021 11:59:51 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mvH9T-0010k3-Do for lore@lore.pengutronix.de; Thu, 09 Dec 2021 11:59:51 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mvH9S-0001Bx-1r for lore@pengutronix.de; Thu, 09 Dec 2021 11:59:50 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=tFgY+0a/fs9ZHNnzt5dpJFBKeoT/bG3g35ipGDsScz8=; b=iWp67zySYFVf5l d9LHF/SR1KF9qie41/SswyvgeLYQFr2dX0K6x/1Un+MnBC91BMOCYh6BAjK8oAbfMnuhyizS6pQnv CNr3yfHfOwGX3MpvMmwet4w48tMgle/ioxW8RP285zNo8u9VX2/BK3/oCcMJGBQmneTR1gHhoXv0+ erqcIhcibNKzTcIZuqylPf7yVlJUkzM5cwMfKRaCinceQIWBAcd3wnt9XNxVapxZGEoYi+0r7jjqL GunKSt02m1y7/+vUzE8+s0jjMpbv5ZFN5UaK0JlfPUu7ruaKx4IQFdiuKAOG0rtfzM+J0ekv6bcYN q/cTpgEMU4ZDoT0Lco0A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvH86-00FhFE-5b; Thu, 09 Dec 2021 10:58:26 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvH81-00FhEH-MJ for barebox@lists.infradead.org; Thu, 09 Dec 2021 10:58:22 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mvH80-0000jV-Ff; Thu, 09 Dec 2021 11:58:20 +0100 Received: from afa by dude.hi.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1mvH80-00ElGw-0q; Thu, 09 Dec 2021 11:58:20 +0100 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Thu, 9 Dec 2021 11:58:17 +0100 Message-Id: <20211209105817.3518258-1-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211209_025821_753693_D292EF6F X-CRM114-Status: GOOD ( 11.13 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:e::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.9 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH] include: : define static_assert X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) BUILD_BUG_ON can't be used outside of a function, unlike static_assert. Import the macro definition. Signed-off-by: Ahmad Fatoum --- include/linux/build_bug.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/linux/build_bug.h b/include/linux/build_bug.h index 43d1fd50d433..40cd504f63ba 100644 --- a/include/linux/build_bug.h +++ b/include/linux/build_bug.h @@ -80,4 +80,23 @@ #endif /* __CHECKER__ */ +/** + * static_assert - check integer constant expression at build time + * + * static_assert() is a wrapper for the C11 _Static_assert, with a + * little macro magic to make the message optional (defaulting to the + * stringification of the tested expression). + * + * Contrary to BUILD_BUG_ON(), static_assert() can be used at global + * scope, but requires the expression to be an integer constant + * expression (i.e., it is not enough that __builtin_constant_p() is + * true for expr). + * + * Also note that BUILD_BUG_ON() fails the build if the condition is + * true, while static_assert() fails the build if the expression is + * false. + */ +#define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) +#define __static_assert(expr, msg, ...) _Static_assert(expr, msg) + #endif /* _LINUX_BUILD_BUG_H */ -- 2.30.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox