Linux-fbdev Archive on lore.kernel.org
 help / color / Atom feed
From: Finn Thain <fthain@telegraphics.com.au>
To: Kees Cook <keescook@chromium.org>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>,
	Joe Perches <joe@perches.com>, Jakub Kicinski <kuba@kernel.org>,
	alsa-devel@alsa-project.org,
	linux-atm-general@lists.sourceforge.net,
	reiserfs-devel@vger.kernel.org, linux-iio@vger.kernel.org,
	linux-wireless@vger.kernel.org, linux-fbdev@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	Nathan Chancellor <natechancellor@gmail.com>,
	linux-ide@vger.kernel.org, dm-devel@redhat.com,
	keyrings@vger.kernel.org, linux-mtd@lists.infradead.org,
	GR-everest-linux-l2@marvell.com, wcn36xx@lists.infradead.org,
	samba-technical@lists.samba.org, linux-i3c@lists.infradead.org,
	linux1394-devel@lists.sourceforge.net,
	linux-afs@lists.infradead.org,
	usb-storage@lists.one-eyed-alien.net, drbd-dev@lists.linbit.com,
	devel@driverdev.osuosl.org, linux-cifs@vger.kernel.org,
	rds-devel@oss.oracle.com,
	Nick Desaulniers <ndesaulniers@google.com>,
	linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org,
	oss-drivers@netronome.com, bridge@lists.linux-foundation.org,
	linux-security-module@vger.kernel.org,
	amd-gfx@lists.freedesktop.org,
	linux-stm32@st-md-mailman.stormreply.com,
	cluster-devel@redhat.com, linux-acpi@vger.kernel.org,
	coreteam@netfilter.org, intel-wired-lan@lists.osuosl.org,
	linux-input@vger.kernel.org, Miguel Ojeda <ojeda@kernel.org>,
	tipc-discussion@lists.sourceforge.net,
	linux-ext4@vger.kernel.org, linux-media@vger.kernel.org,
	linux-watchdog@vger.kernel.org, selinux@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org,
	linux-geode@lists.infradead.org, linux-can@vger.kernel.org,
	linux-block@vger.kernel.org, linux-gpio@vger.kernel.org,
	op-tee@lists.trustedfirmware.org,
	linux-mediatek@lists.infradead.org,
	xen-devel@lists.xenproject.org, nouveau@lists.freedesktop.org,
	linux-hams@vger.kernel.org, ceph-devel@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org,
	linux-hwmon@vger.kernel.org, x86@kernel.org,
	linux-nfs@vger.kernel.org, GR-Linux-NIC-Dev@marvell.com,
	linux-mm@kvack.org, netdev@vger.kernel.org,
	linux-decnet-user@lists.sourceforge.net,
	linux-mmc@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	linux-sctp@vger.kernel.org, linux-usb@vger.kernel.org,
	netfilter-devel@vger.kernel.org, linux-crypto@vger.kernel.org,
	patches@opensource.cirrus.com, linux-integrity@vger.kernel.org,
	target-devel@vger.kernel.org, linux-hardening@vger.kernel.org,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	Greg KH <gregkh@linuxfoundation.org>
Subject: Re: [Intel-wired-lan] [PATCH 000/141] Fix fall-through warnings for Clang
Date: Wed, 25 Nov 2020 09:24:08 +1100 (AEDT)
Message-ID: <alpine.LNX.2.23.453.2011250859290.15@nippy.intranet> (raw)
In-Reply-To: <202011241327.BB28F12F6@keescook>

On Tue, 24 Nov 2020, Kees Cook wrote:

> On Mon, Nov 23, 2020 at 08:31:30AM -0800, James Bottomley wrote:
> > Really, no ... something which produces no improvement has no value at 
> > all ... we really shouldn't be wasting maintainer time with it because 
> > it has a cost to merge.  I'm not sure we understand where the balance 
> > lies in value vs cost to merge but I am confident in the zero value 
> > case.
> 
> What? We can't measure how many future bugs aren't introduced because 
> the kernel requires explicit case flow-control statements for all new 
> code.
> 

These statements are not "missing" unless you presume that code written 
before the latest de facto language spec was written should somehow be 
held to that spec.

If the 'fallthrough' statement is not part of the latest draft spec then 
we should ask why not before we embrace it. Being that the kernel still 
prefers -std=gnu89 you might want to consider what has prevented 
-std=gnu99 or -std=gnu2x etc.

> We already enable -Wimplicit-fallthrough globally, so that's not the 
> discussion. The issue is that Clang is (correctly) even more strict than 
> GCC for this, so these are the remaining ones to fix for full Clang 
> coverage too.
> 

Seems to me you should be patching the compiler.

When you have consensus among the language lawyers you'll have more 
credibility with those being subjected to enforcement.

  reply index

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-20 18:21 Gustavo A. R. Silva
2020-11-20 18:28 ` Joe Perches
2020-11-20 19:02   ` Gustavo A. R. Silva
2020-11-20 18:40 ` [PATCH 134/141] video: fbdev: lxfb_ops: " Gustavo A. R. Silva
2020-11-22 22:05   ` Sam Ravnborg
2020-11-24 14:44     ` Gustavo A. R. Silva
2020-11-20 18:40 ` [PATCH 135/141] video: fbdev: pm2fb: " Gustavo A. R. Silva
2020-11-20 18:53 ` [PATCH 000/141] " Jakub Kicinski
2020-11-20 19:04   ` Gustavo A. R. Silva
2020-11-20 19:30   ` Kees Cook
2020-11-20 19:51     ` Jakub Kicinski
2020-11-20 20:48       ` Kees Cook
2020-11-22 16:17       ` Kees Cook
2020-11-22 18:21         ` James Bottomley
2020-11-22 18:25           ` Joe Perches
2020-11-22 19:12             ` James Bottomley
2020-11-22 19:22               ` Joe Perches
2020-11-22 19:53                 ` James Bottomley
2020-11-23 13:03                   ` [Intel-wired-lan] " Gustavo A. R. Silva
2020-11-23 16:31                     ` James Bottomley
2020-11-24 21:32                       ` Kees Cook
2020-11-24 22:24                         ` Finn Thain [this message]
2020-11-24 23:15                           ` Miguel Ojeda
2020-11-24 23:53                             ` Finn Thain
2020-11-25  1:05                               ` Miguel Ojeda
2020-11-25  7:05                         ` James Bottomley
2020-11-25 12:24                           ` Nick Desaulniers
2020-11-25 21:33                             ` Finn Thain
2020-11-25 22:09                               ` Nick Desaulniers
2020-11-25 23:21                                 ` Finn Thain
2020-11-26  0:30                                 ` Finn Thain
     [not found]                             ` <20201125082405.1d8c23dc@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
2020-11-25 17:04                               ` Miguel Ojeda
2020-11-25 22:09                               ` Nick Desaulniers
2020-11-25 21:10                           ` Kees Cook
2020-11-22 20:35           ` Miguel Ojeda
2020-11-22 22:36             ` James Bottomley
2020-11-23 14:19               ` Miguel Ojeda
2020-11-23 15:58                 ` James Bottomley
2020-11-23 16:24                   ` Rafael J. Wysocki
2020-11-23 16:32                   ` Joe Perches
2020-11-23 18:56                   ` Miguel Ojeda
2020-11-23 20:37                     ` James Bottomley
2020-11-25  0:32                       ` Miguel Ojeda
2020-11-25 22:44                         ` Edward Cree
2020-11-26 14:53                           ` Miguel Ojeda
2020-11-26 15:28                             ` Geert Uytterhoeven
2020-11-26 16:18                               ` Karol Herbst
2020-11-26 17:05                               ` Miguel Ojeda
2020-11-25 10:38                       ` Andy Shevchenko
2020-11-25  9:01                   ` Sean Young
2020-11-22 22:54             ` Finn Thain
2020-11-22 23:04               ` James Bottomley
2020-11-23 14:05               ` Miguel Ojeda
2020-11-24  0:58                 ` Finn Thain
2020-11-24  1:05                   ` Joe Perches
2020-11-24  2:48                     ` Finn Thain
2020-11-24 23:46                   ` Miguel Ojeda
2020-11-22 22:10           ` Sam Ravnborg
2020-11-24  1:32         ` Nick Desaulniers
2020-11-24 21:25           ` Kees Cook
2020-11-25 23:02             ` Edward Cree
2020-12-01 14:08           ` Dan Carpenter
2020-12-01 14:04         ` Dan Carpenter
2020-11-20 22:21 ` Miguel Ojeda
2020-11-23 20:03 ` Jason Gunthorpe
2020-11-24 14:47   ` Gustavo A. R. Silva
     [not found] ` <160616392671.21180.16517492185091399884.b4-ty@kernel.org>
2020-11-24 14:47   ` Gustavo A. R. Silva
2020-12-01  5:52 ` Martin K. Petersen
2020-12-01  8:20   ` Gustavo A. R. Silva
2020-12-08  4:52 ` (subset) " Martin K. Petersen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.LNX.2.23.453.2011250859290.15@nippy.intranet \
    --to=fthain@telegraphics.com.au \
    --cc=GR-Linux-NIC-Dev@marvell.com \
    --cc=GR-everest-linux-l2@marvell.com \
    --cc=James.Bottomley@HansenPartnership.com \
    --cc=Jonathan.Cameron@huawei.com \
    --cc=alsa-devel@alsa-project.org \
    --cc=amd-gfx@lists.freedesktop.org \
    --cc=bridge@lists.linux-foundation.org \
    --cc=ceph-devel@vger.kernel.org \
    --cc=cluster-devel@redhat.com \
    --cc=coreteam@netfilter.org \
    --cc=devel@driverdev.osuosl.org \
    --cc=dm-devel@redhat.com \
    --cc=drbd-dev@lists.linbit.com \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=gustavoars@kernel.org \
    --cc=intel-gfx@lists.freedesktop.org \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=joe@perches.com \
    --cc=keescook@chromium.org \
    --cc=keyrings@vger.kernel.org \
    --cc=kuba@kernel.org \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-afs@lists.infradead.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-atm-general@lists.sourceforge.net \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-can@vger.kernel.org \
    --cc=linux-cifs@vger.kernel.org \
    --cc=linux-crypto@vger.kernel.org \
    --cc=linux-decnet-user@lists.sourceforge.net \
    --cc=linux-ext4@vger.kernel.org \
    --cc=linux-fbdev@vger.kernel.org \
    --cc=linux-geode@lists.infradead.org \
    --cc=linux-gpio@vger.kernel.org \
    --cc=linux-hams@vger.kernel.org \
    --cc=linux-hardening@vger.kernel.org \
    --cc=linux-hwmon@vger.kernel.org \
    --cc=linux-i3c@lists.infradead.org \
    --cc=linux-ide@vger.kernel.org \
    --cc=linux-iio@vger.kernel.org \
    --cc=linux-input@vger.kernel.org \
    --cc=linux-integrity@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=linux-mediatek@lists.infradead.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-mmc@vger.kernel.org \
    --cc=linux-mtd@lists.infradead.org \
    --cc=linux-nfs@vger.kernel.org \
    --cc=linux-rdma@vger.kernel.org \
    --cc=linux-renesas-soc@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=linux-sctp@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=linux-stm32@st-md-mailman.stormreply.com \
    --cc=linux-usb@vger.kernel.org \
    --cc=linux-watchdog@vger.kernel.org \
    --cc=linux-wireless@vger.kernel.org \
    --cc=linux1394-devel@lists.sourceforge.net \
    --cc=natechancellor@gmail.com \
    --cc=ndesaulniers@google.com \
    --cc=netdev@vger.kernel.org \
    --cc=netfilter-devel@vger.kernel.org \
    --cc=nouveau@lists.freedesktop.org \
    --cc=ojeda@kernel.org \
    --cc=op-tee@lists.trustedfirmware.org \
    --cc=oss-drivers@netronome.com \
    --cc=patches@opensource.cirrus.com \
    --cc=rds-devel@oss.oracle.com \
    --cc=reiserfs-devel@vger.kernel.org \
    --cc=samba-technical@lists.samba.org \
    --cc=selinux@vger.kernel.org \
    --cc=target-devel@vger.kernel.org \
    --cc=tipc-discussion@lists.sourceforge.net \
    --cc=usb-storage@lists.one-eyed-alien.net \
    --cc=virtualization@lists.linux-foundation.org \
    --cc=wcn36xx@lists.infradead.org \
    --cc=x86@kernel.org \
    --cc=xen-devel@lists.xenproject.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-fbdev Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-fbdev/0 linux-fbdev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-fbdev linux-fbdev/ https://lore.kernel.org/linux-fbdev \
		linux-fbdev@vger.kernel.org
	public-inbox-index linux-fbdev

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-fbdev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git