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X-RootMTR: 20230621094824eucas1p2b6adfbd3f15ff3665674917f419b25d3 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20230621094824eucas1p2b6adfbd3f15ff3665674917f419b25d3 References: <20230621091000.424843-1-j.granados@samsung.com> <20230621094817.433842-1-j.granados@samsung.com> <87o7l92hg8.fsf@intel.com> X-Mailman-Approved-At: Tue, 27 Jun 2023 14:38:30 +0000 Subject: Re: [Intel-gfx] [PATCH 09/11] sysctl: Remove the end element in sysctl table arrays X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juri Lelli , Miaohe Lin , "Rafael J. Wysocki" , Catalin Marinas , dri-devel@lists.freedesktop.org, Ben Segall , linux-sctp@vger.kernel.org, ocfs2-devel@oss.oracle.com, Miquel Raynal , Alexander Gordeev , "K. Y. Srinivasan" , Stefan Schmidt , Wei Liu , Michael Ellerman , bridge@lists.linux-foundation.org, James Morris , Christophe Leroy , Jozsef Kadlecsik , Eric Biggers , linux-cachefs@redhat.com, Mel Gorman , "Darrick J. Wong" , Waiman Long , Christian Borntraeger , Petr Mladek , Martin Schiller , Russ Weight , Boqun Feng , Nicholas Piggin , John Ogness , Alexander Viro , Andy Lutomirski , Remi Denis-Courmont , xen-devel@lists.xenproject.org, Thomas Gleixner , Trond Myklebust , Anton Altaparmakov , Christian Brauner , Will Drewry , Neil Horman , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Ralf Baechle , Sergey Senozhatsky , mcgrof@kernel.org, Chuck Lever , netfilter-devel@vger.kernel.org, Masami Hiramatsu , Jiri Olsa , linux-fsdevel@vger.kernel.org, Matthieu Baerts , Andrew Morton , linux-trace-kernel@vger.kernel.org, linux-wpan@vger.kernel.org, Mark Rutland , linux-aio@kvack.org, "Jason A. Donenfeld" , linux-ia64@vger.kernel.org, Naoya Horiguchi , Dave Hansen , Clemens Ladisch , Phillip Potter , Song Liu , Eric Dumazet , keyrings@vger.kernel.org, John Stultz , Stanislav Fomichev , Jan Karcher , codalist@telemann.coda.cs.cmu.edu, linux-s390@vger.kernel.org, Valentin Schneider , Stefano Stabellini , Corey Minyard , Leon Romanovsky , Oleksandr Tyshchenko , Will Deacon , John Fastabend , Andrii Nakryiko , Anil S Keshavamurthy , Mat Martineau , Matthew Bobrowski , Julian Anastasov , coreteam@netfilter.org, Roopa Prabhu , Yonghong Song , Iurii Zaikin , Sven Schnelle , Vasily Gorbik , Mike Travis , Wenjia Zhang , Simon Horman , Xin Long , linux-arm-kernel@lists.infradead.org, fsverity@lists.linux.dev, Hao Luo , Theodore Ts'o , Stephen Boyd , Muchun Song , Florian Westphal , Robin Holt , "David S. Miller" , Jon Maloy , Jarkko Sakkinen , Eric Biederman , Anna Schumaker , Daniel Bristot de Oliveira , Mike Kravetz , Marcelo Ricardo Leitner , Benjamin Herrenschmidt , linux-hams@vger.kernel.org, Nikolay Aleksandrov , Alexei Starovoitov , Marc Dionne , Jiri Slaby , linux-afs@lists.infradead.org, Daniel Borkmann , linux-rdma@vger.kernel.org, Dexuan Cui , "Matthew Wilcox \(Oracle\)" , lvs-devel@vger.kernel.org, coda@cs.cmu.edu, Doug Gilbert , "Naveen N. Rao" , Gerald Schaefer , Paolo Abeni , Pablo Neira Ayuso , "Serge E. Hallyn" , Kees Cook , Arnd Bergmann , Haiyang Zhang , intel-gfx@lists.freedesktop.org, Steven Rostedt , linux-crypto@vger.kernel.org, Borislav Petkov , Rodrigo Vivi , openipmi-developer@lists.sourceforge.net, mptcp@lists.linux.dev, Jan Harkes , linux-nfs@vger.kernel.org, "Martin K. Petersen" , linux-mm@kvack.org, Jeff Layton , Andy Lutomirski , linux-xfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, netdev@vger.kernel.org, Ying Xue , bpf@vger.kernel.org, Sudip Mukherjee , Dietmar Eggemann , Alexander Aring , Jan Kara , Steve Wahl , Peter Zijlstra , Balbir Singh , Amir Goldstein , KP Singh , David Howells , Joseph Qi , "H. Peter Anvin" , David Airlie , Steffen Klassert , rds-devel@oss.oracle.com, Herbert Xu , linux-scsi@vger.kernel.org, dccp@vger.kernel.org, Mark Fasheh , x86@kernel.org, Russell King , Jason Gunthorpe , Ingo Molnar , Jakub Kicinski , "James E.J. Bottomley" , Joerg Reuter , linux-hyperv@vger.kernel.org, Heiko Carstens , Santosh Shilimkar , apparmor@lists.ubuntu.com, linux-raid@vger.kernel.org, Paul Moore , Juergen Gross , John Johansen , linux-x25@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, David Ahern , kexec@lists.infradead.org, linux-security-module@vger.kernel.org, Benjamin LaHaise , tipc-discussion@lists.sourceforge.net, Daniel Vetter , Martin KaFai Lau , Karsten Graul , Joel Becker Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" --avrt2cz7yepdubk6 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jun 21, 2023 at 02:16:55PM +0300, Jani Nikula wrote: > On Wed, 21 Jun 2023, Joel Granados wrote: > > Remove the empty end element from all the arrays that are passed to the > > register sysctl calls. In some files this means reducing the explicit > > array size by one. Also make sure that we are using the size in > > ctl_table_header instead of evaluating the .procname element. >=20 > Where's the harm in removing the end elements driver by driver? This is > an unwieldy patch to handle. I totally agree. Its a big one!!! but I'm concerned of breaking bisectibili= ty: * I could for example separate all the removes into separate commits and then have a final commit that removes the check for the empty element. But this will leave the tree in a state where the for loop will have undefined behavior when it looks for the empty end element. It might or might not work (probably not :) until the final commit where I fix that. * I could also change the logic that looks for the final element, commit that first and then remove the empty element one commit per driver after that. But then for all the arrays that still have an empty element, there would again be undefined behavior as it would think that the last element is valid (when it is really the sentinel). Any ideas on how to get around these? >=20 > > diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i9= 15_perf.c > > index f43950219ffc..e4d7372afb10 100644 > > --- a/drivers/gpu/drm/i915/i915_perf.c > > +++ b/drivers/gpu/drm/i915/i915_perf.c > > @@ -4884,24 +4884,23 @@ int i915_perf_remove_config_ioctl(struct drm_de= vice *dev, void *data, > > =20 > > static struct ctl_table oa_table[] =3D { > > { > > - .procname =3D "perf_stream_paranoid", > > - .data =3D &i915_perf_stream_paranoid, > > - .maxlen =3D sizeof(i915_perf_stream_paranoid), > > - .mode =3D 0644, > > - .proc_handler =3D proc_dointvec_minmax, > > - .extra1 =3D SYSCTL_ZERO, > > - .extra2 =3D SYSCTL_ONE, > > - }, > > + .procname =3D "perf_stream_paranoid", > > + .data =3D &i915_perf_stream_paranoid, > > + .maxlen =3D sizeof(i915_perf_stream_paranoid), > > + .mode =3D 0644, > > + .proc_handler =3D proc_dointvec_minmax, > > + .extra1 =3D SYSCTL_ZERO, > > + .extra2 =3D SYSCTL_ONE, > > + }, > > { > > - .procname =3D "oa_max_sample_rate", > > - .data =3D &i915_oa_max_sample_rate, > > - .maxlen =3D sizeof(i915_oa_max_sample_rate), > > - .mode =3D 0644, > > - .proc_handler =3D proc_dointvec_minmax, > > - .extra1 =3D SYSCTL_ZERO, > > - .extra2 =3D &oa_sample_rate_hard_limit, > > - }, > > - {} > > + .procname =3D "oa_max_sample_rate", > > + .data =3D &i915_oa_max_sample_rate, > > + .maxlen =3D sizeof(i915_oa_max_sample_rate), > > + .mode =3D 0644, > > + .proc_handler =3D proc_dointvec_minmax, > > + .extra1 =3D SYSCTL_ZERO, > > + .extra2 =3D &oa_sample_rate_hard_limit, > > + } > > }; >=20 > The existing indentation is off, but fixing it doesn't really belong in > this patch. Agreed. But I actually was trying to fix something that checkpatch flagged. I'll change these back (which will cause this patch to be flagged). An alternative solution would be to fix the indentation as part of the preparation patches. Tell me what you think. Thx >=20 > BR, > Jani. >=20 >=20 > --=20 > Jani Nikula, Intel Open Source Graphics Center --=20 Joel Granados --avrt2cz7yepdubk6 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQGzBAABCgAdFiEErkcJVyXmMSXOyyeQupfNUreWQU8FAmSS9cQACgkQupfNUreW QU/tWQv+LHqhRfLnActmTK06NicBnR3PUYRIMank4jSVG6jtvqu/VBMNmvKyRaeA 68kGzzIEbayPbBOL1M2GmrBgIaWp9OIWt4jKQeY4ARm9DcL2FWqUqLufGoPlwjX/ 0GFjsIlBykddf6c3149Hf7D2Xz+hZyF8GgqMaIuty4hcNbIoeYs5zmwPaQmn+/q0 eoe07uBOs32ocQPIMJuRPMw6KSxHYOiWbNHxgQlIl7stObKOuvQXO2GLDgqHc13y NKMTC6XNh4VAc7JHtrsEVEBiVro3IGh7cS5U5DK0jhlSLsRfJUkXmSO4H9EwGLBq mWAl5Qr+YGnCrfE6jGc7uTM0etzscRGIlKIJ+7qcLgSfVgkqYeb5AmkZ8bvailD8 h66rr3XzwBKiQRaXpk6V7/IliqJcG7+N2yGsGJ3UXpvoF/1ieeb39kcSOFZ75BU5 USV/t5Fj0VqHetwv6dC5A8RLktlHNQZcTAXJkLL0QZ5xrmWC9kiIJ/EzJnCgJlSu AwkfgT+P =LLXc -----END PGP SIGNATURE----- --avrt2cz7yepdubk6--