From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jCJ9K-0000OJ-2k for barebox@lists.infradead.org; Thu, 12 Mar 2020 08:25:03 +0000 Date: Thu, 12 Mar 2020 09:24:59 +0100 From: Sascha Hauer Message-ID: <20200312082459.GC4638@pengutronix.de> References: <20200311142757.25263-1-s.hauer@pengutronix.de> <20200311142757.25263-6-s.hauer@pengutronix.de> <20200311235154.GA28876@emlix.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200311235154.GA28876@emlix.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 05/16] Introduce slices To: Daniel =?iso-8859-15?Q?Gl=F6ckner?= Cc: Barebox List , Edmund Henniges On Thu, Mar 12, 2020 at 12:51:54AM +0100, Daniel Gl=F6ckner wrote: > Hello Sascha, > = > On Wed, Mar 11, 2020 at 03:27:46PM +0100, Sascha Hauer wrote: > > +/** > > + * slice_acquired: test if a slice is acquired > > + * @slice: The slice to test > > + * > > + * This tests if a slice is acquired. Returns true if it is, false oth= erwise > > + */ > > +bool slice_acquired(struct slice *slice) > > +{ > > + struct slice_entry *se; > > + int acquired =3D slice->acquired; > > + bool ret =3D false; > > + > > + if (acquired > 0) > > + return true; > > + > > + if (acquired < 0) { > > + pr_err("Recursive dependency detected in slice %s\n", > > + slice_name(slice)); > > + panic("Cannot continue"); > > + } > > + > > + slice->acquired =3D -1; > > + > > + list_for_each_entry(se, &slice->deps, list) > > + if (slice_acquired(se->slice)) { > > + ret =3D true; > > + break; > > + } > > + > > + slice->acquired =3D acquired; > = > no need to restore slice->acquire from acquired since > acquired must have been zero if we reach this line. Hm, no. Nothing changes slice->acquired in this function besides ourselves. It is still -1 how we have set it previously. Sascha -- = 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