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Mon, 13 Dec 2021 23:17:13 +0100 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1mwtdB-00048M-4o; Mon, 13 Dec 2021 23:17:13 +0100 Date: Mon, 13 Dec 2021 23:17:13 +0100 To: Ahmad Fatoum Cc: barebox@lists.infradead.org Message-ID: <20211213221713.GG6003@pengutronix.de> References: <20211209105817.3518258-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211209105817.3518258-1-a.fatoum@pengutronix.de> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 23:17:02 up 3 days, 7:02, 33 users, load average: 0.07, 0.07, 0.09 User-Agent: Mutt/1.10.1 (2018-07-13) From: Sascha Hauer X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211213_141714_749543_A7DE8DFD X-CRM114-Status: GOOD ( 27.44 ) 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: Re: [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) On Thu, Dec 09, 2021 at 11:58:17AM +0100, Ahmad Fatoum wrote: > 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(+) Applied, thanks Sascha > > 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 > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox