From: Mauro Carvalho Chehab <mchehab@infradead.org>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Devin Heitmueller <dheitmueller@kernellabs.com>,
Hans Verkuil <hverkuil@xs4all.nl>, Jesper Juhl <jj@chaosbits.net>,
LKML <linux-kernel@vger.kernel.org>,
trivial@kernel.org, linux-media@vger.kernel.org,
ceph-devel@vger.kernel.org, Sage Weil <sage@newdream.net>
Subject: Re: [RFC] Don't use linux/version.h anymore to indicate a per-driver version - Was: Re: [PATCH 03/37] Remove unneeded version.h includes from include/
Date: Fri, 24 Jun 2011 18:52:58 -0300 [thread overview]
Message-ID: <4E05073A.3030209@infradead.org> (raw)
In-Reply-To: <20110624231028.7f03dcae@stein>
Em 24-06-2011 18:10, Stefan Richter escreveu:
> On Jun 24 Devin Heitmueller wrote:
>> Really, this is all about applications being able to jam a hack into
>> their code that translates to "don't call this ioctl() with some
>> particular argument if it's driver W less than version X, because the
>> driver had a bug that is likely to panic the guy's PC". Sure, it's a
>> crummy solution, but at this point it's the best that we have got.
>
> The second best. The best that we have got is that the user runs a fixed
> kernel.
>
> Anyway; if this is the only purpose that this interface version¹ serves,
> then Mauro's subsystem-centralized solution has the benefit that it
> eliminates mistakes due to oversight by individual driver authors.
> Especially because the kind of implementation behavior changes that are
> tracked by this type of version datum are sometimes just discovered or
> documented in hindsight. On the other hand, Mauro's solution is redundant
> to the uname(2) syscall.
Yes. That's why my initial proposal were to add some value to it by not associating
it with the kernel version, but with a number that will be incremented only if
the V4L2 API changes.
>
> ¹) Yes, it is still an ABI version, nothing less. With all its backwards
> and forwards compatibility ramifications.
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WARNING: multiple messages have this Message-ID (diff)
From: Mauro Carvalho Chehab <mchehab@infradead.org>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Devin Heitmueller <dheitmueller@kernellabs.com>,
Hans Verkuil <hverkuil@xs4all.nl>, Jesper Juhl <jj@chaosbits.net>,
LKML <linux-kernel@vger.kernel.org>,
trivial@kernel.org, linux-media@vger.kernel.org,
ceph-devel@vger.kernel.org, Sage Weil <sage@newdream.net>
Subject: Re: [RFC] Don't use linux/version.h anymore to indicate a per-driver version - Was: Re: [PATCH 03/37] Remove unneeded version.h includes from include/
Date: Fri, 24 Jun 2011 18:52:58 -0300 [thread overview]
Message-ID: <4E05073A.3030209@infradead.org> (raw)
In-Reply-To: <20110624231028.7f03dcae@stein>
Em 24-06-2011 18:10, Stefan Richter escreveu:
> On Jun 24 Devin Heitmueller wrote:
>> Really, this is all about applications being able to jam a hack into
>> their code that translates to "don't call this ioctl() with some
>> particular argument if it's driver W less than version X, because the
>> driver had a bug that is likely to panic the guy's PC". Sure, it's a
>> crummy solution, but at this point it's the best that we have got.
>
> The second best. The best that we have got is that the user runs a fixed
> kernel.
>
> Anyway; if this is the only purpose that this interface version¹ serves,
> then Mauro's subsystem-centralized solution has the benefit that it
> eliminates mistakes due to oversight by individual driver authors.
> Especially because the kind of implementation behavior changes that are
> tracked by this type of version datum are sometimes just discovered or
> documented in hindsight. On the other hand, Mauro's solution is redundant
> to the uname(2) syscall.
Yes. That's why my initial proposal were to add some value to it by not associating
it with the kernel version, but with a number that will be incremented only if
the V4L2 API changes.
>
> ¹) Yes, it is still an ABI version, nothing less. With all its backwards
> and forwards compatibility ramifications.
next prev parent reply other threads:[~2011-06-24 21:53 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-23 21:51 [PATCH 00/37] Remove unneeded version.h includes (and add where needed) Jesper Juhl
2011-06-23 21:54 ` [PATCH 01/37] Remove unneeded version.h includes from sound/ Jesper Juhl
2011-06-24 9:29 ` Takashi Iwai
2011-06-24 9:29 ` Takashi Iwai
2011-06-23 21:56 ` [PATCH 02/37] Remove unneeded version.h include from lib/ Jesper Juhl
2011-06-23 21:58 ` [PATCH 03/37] Remove unneeded version.h includes from include/ Jesper Juhl
2011-06-23 22:15 ` Sage Weil
2011-06-24 11:21 ` [RFC] Don't use linux/version.h anymore to indicate a per-driver version - Was: " Mauro Carvalho Chehab
2011-06-24 11:26 ` Hans Verkuil
2011-06-24 12:20 ` Devin Heitmueller
2011-06-24 12:20 ` Devin Heitmueller
2011-06-24 13:29 ` Mauro Carvalho Chehab
2011-06-24 13:45 ` Devin Heitmueller
2011-06-24 13:45 ` Devin Heitmueller
2011-06-24 13:54 ` Hans Verkuil
2011-06-24 14:37 ` Mauro Carvalho Chehab
2011-06-24 18:25 ` [PATCH] [media] Stop using linux/version.h on most drivers Mauro Carvalho Chehab
2011-06-25 10:09 ` Hans Verkuil
2011-06-25 12:14 ` Mauro Carvalho Chehab
2011-06-25 12:14 ` Mauro Carvalho Chehab
2011-06-27 0:59 ` Laurent Pinchart
2011-06-24 18:34 ` [RFC] Don't use linux/version.h anymore to indicate a per-driver version - Was: Re: [PATCH 03/37] Remove unneeded version.h includes from include/ Stefan Richter
2011-06-24 18:48 ` Devin Heitmueller
2011-06-24 18:48 ` Devin Heitmueller
2011-06-24 21:04 ` Andy Walls
2011-06-24 21:20 ` Stefan Richter
2011-06-24 21:22 ` Devin Heitmueller
2011-06-24 21:22 ` Devin Heitmueller
2011-06-24 21:49 ` Mauro Carvalho Chehab
2011-06-24 22:39 ` Stefan Richter
2011-06-24 22:39 ` Stefan Richter
2011-06-24 23:02 ` Mauro Carvalho Chehab
2011-06-24 22:16 ` Mauro Carvalho Chehab
2011-06-24 22:57 ` Andy Walls
2011-06-24 21:10 ` Stefan Richter
2011-06-24 21:10 ` Stefan Richter
2011-06-24 21:52 ` Mauro Carvalho Chehab [this message]
2011-06-24 21:52 ` Mauro Carvalho Chehab
2011-06-24 21:44 ` Mauro Carvalho Chehab
2011-06-29 21:54 ` Mauro Carvalho Chehab
2011-06-23 21:59 ` [PATCH 04/37] Remove unneeded version.h includes from fs/ Jesper Juhl
2011-06-23 21:59 ` Jesper Juhl
2011-06-24 13:26 ` Bob Copeland
2011-06-24 13:26 ` Bob Copeland
2011-06-23 22:00 ` [PATCH 05/37] Remove unneeded version.h include from arch/x86/ Jesper Juhl
2011-06-23 22:07 ` [PATCH 06/37] Remove unneeded version.h includes from arch/mips/ Jesper Juhl
2011-08-02 10:22 ` Ralf Baechle
2011-06-23 22:08 ` [PATCH 07/37] Remove unneeded version.h includes from arch/arm/ Jesper Juhl
2011-06-23 22:08 ` Jesper Juhl
2011-06-23 23:01 ` Jiandong Zheng
2011-06-23 23:01 ` Jiandong Zheng
2011-06-23 23:02 ` JD (Jiandong) Zheng
2011-06-23 23:02 ` JD (Jiandong) Zheng
2011-06-23 22:09 ` [Drbd-dev] [PATCH 08/37] Remove unneeded version.h includes from drivers/block/ Jesper Juhl
2011-06-23 22:09 ` Jesper Juhl
2011-06-23 22:10 ` [PATCH 09/37] Remove unneeded version.h includes from drivers/input/ Jesper Juhl
2011-06-23 22:10 ` Jesper Juhl
2011-06-23 22:50 ` Mike Frysinger
2011-06-23 22:50 ` Mike Frysinger
2011-06-27 7:10 ` Hennerich, Michael
2011-06-27 19:00 ` Dmitry Torokhov
2011-06-27 19:00 ` Dmitry Torokhov
2011-06-23 22:11 ` [PATCH 10/37] Remove unneeded version.h includes from drivers/media/dvb/ Jesper Juhl
2011-06-23 22:14 ` [PATCH 11/37] Remove unneeded version.h includes (and add where needed) for drivers/media/radio/ Jesper Juhl
2011-06-23 22:17 ` [PATCH 12/37] Remove unneeded version.h includes (and add where needed) for drivers/media/video/ Jesper Juhl
2011-06-24 8:52 ` Laurent Pinchart
2011-06-23 22:21 ` [PATCH 13/37] Remove unneeded version.h includes from drivers/net/ Jesper Juhl
2011-06-24 9:40 ` David Miller
2011-06-24 9:40 ` David Miller
[not found] ` <alpine.LNX.2.00.1106232344480.17688-h2p7t3/P30RzeRGmFJ5qR7ZzlVVXadcDXqFh9Ls21Oc@public.gmane.org>
2011-06-23 22:26 ` [PATCH 14/37] Remove unneeded version.h includes from drivers/scsi/ Jesper Juhl
2011-06-23 22:26 ` Jesper Juhl
2011-06-23 22:30 ` [PATCH 15/37] Remove unneeded version.h includes from drivers/target/ Jesper Juhl
2011-06-23 22:31 ` [PATCH 16/37] Remove unneeded version.h includes (and add where needed) for drivers/usb/ Jesper Juhl
2011-06-27 8:20 ` Felipe Balbi
2011-06-27 8:49 ` Laurent Pinchart
2011-06-23 22:32 ` [PATCH 17/37] Remove unneeded version.h include from drivers/uwb/ Jesper Juhl
2011-06-23 22:35 ` [PATCH 18/37] Remove unneeded version.h includes from Jesper Juhl
2011-06-23 22:35 ` [PATCH 18/37] Remove unneeded version.h includes from drivers/video/ Jesper Juhl
2011-06-23 22:51 ` Mike Frysinger
2011-06-23 22:51 ` Mike Frysinger
2011-06-24 8:17 ` Paul Mundt
2011-06-24 8:17 ` Paul Mundt
2011-06-23 22:40 ` [PATCH 19/37] Remove unneeded version.h includes from drivers/staging/rtl*/ Jesper Juhl
2011-06-23 23:57 ` Larry Finger
2011-06-23 22:41 ` [PATCH 20/37] Remove unneeded version.h includes from drivers/staging/gma500/ Jesper Juhl
2011-06-23 23:17 ` Alan Cox
2011-07-07 10:42 ` Alan Cox
2011-06-23 22:42 ` [PATCH 21/37] Remove unneeded version.h includes from drivers/staging/ath6kl/ Jesper Juhl
2011-06-23 22:43 ` [PATCH 22/37] Remove unneeded version.h include from drivers/staging/bcm/headers.h Jesper Juhl
2011-06-23 22:44 ` [PATCH 23/37] Remove unneeded version.h include from drivers/staging/cxd2099/cxd2099.c Jesper Juhl
2011-06-23 22:47 ` [PATCH 24/37] Remove unneeded version.h include from drivers/staging/cxt1e1/sbecom_inline_linux.h Jesper Juhl
2011-06-23 22:51 ` [PATCH 25/37] Remove unneeded version.h includes (and add where needed) for drivers/staging/easycap/ Jesper Juhl
2011-06-23 22:52 ` [PATCH 26/37] Remove unneeded version.h include from drivers/staging/hv/hv_timesource.c Jesper Juhl
2011-06-23 22:53 ` [PATCH 27/37] Remove unneeded version.h includes from drivers/staging/lirc/ Jesper Juhl
2011-06-23 22:54 ` [PATCH 28/37] Remove unneeded version.h include from drivers/staging/mei/main.c Jesper Juhl
2011-06-23 22:56 ` [PATCH 29/37] Remove unneeded version.h includes from drivers/staging/msm/ Jesper Juhl
2011-06-24 1:47 ` David Brown
2011-06-23 22:58 ` [PATCH 30/37] Remove unneeded version.h include from drivers/staging/panel/panel.c Jesper Juhl
2011-06-23 23:00 ` [PATCH 31/37] Remove unneeded version.h include from drivers/staging/rts_pstor/rtsx.h Jesper Juhl
2011-06-23 23:01 ` [PATCH 32/37] Remove unneeded version.h includes from drivers/staging/speakup/ Jesper Juhl
2011-06-23 23:02 ` [PATCH 33/37] Remove unneeded version.h include from drivers/staging/tidspbridge/include/dspbridge/host_os.h Jesper Juhl
2011-06-23 23:04 ` [PATCH 34/37] Remove unneeded version.h includes (and add where needed) for drivers/tm6000/ Jesper Juhl
2011-06-23 23:05 ` [PATCH 35/37] Remove unneeded version.h includes from drivers/staging/wlags49_h2/ Jesper Juhl
2011-06-23 23:06 ` [PATCH 36/37] Remove unneeded version.h include from drivers/staging/wlan-ng/prism2sta.c Jesper Juhl
2011-06-23 23:08 ` [PATCH 37/37] Remove unneeded version.h includes from drivers/staging/xgifb/ Jesper Juhl
2011-06-24 9:13 ` [PATCH 00/37] Remove unneeded version.h includes (and add where needed) Jiri Kosina
2011-06-24 10:48 ` Jesper Juhl
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