* /usr/include/*/acpi.h
@ 2007-01-03 20:52 Len Brown
2007-01-04 8:45 ` /usr/include/*/acpi.h Thomas Renninger
0 siblings, 1 reply; 6+ messages in thread
From: Len Brown @ 2007-01-03 20:52 UTC (permalink / raw)
To: Thomas Renninger; +Cc: linux-acpi
Thomas,
Why do the following files appear in OpenSuse 10.2?
$ find /usr/include -name '*acpi*'
/usr/include/asm/acpi.h
/usr/include/asm-x86_64/acpi.h
/usr/include/asm-i386/acpi.h
/usr/include/linux/acpi.h
/usr/include/linux/pci-acpi.h
They are not present on a Fedora Core 6 system.
thanks,
-Len
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: /usr/include/*/acpi.h
2007-01-03 20:52 /usr/include/*/acpi.h Len Brown
@ 2007-01-04 8:45 ` Thomas Renninger
2007-01-04 10:49 ` /usr/include/*/acpi.h Thorsten Kukuk
0 siblings, 1 reply; 6+ messages in thread
From: Thomas Renninger @ 2007-01-04 8:45 UTC (permalink / raw)
To: Len Brown; +Cc: kukuk, linux-acpi, pbaudis
On Wed, 2007-01-03 at 15:52 -0500, Len Brown wrote:
> Thomas,
> Why do the following files appear in OpenSuse 10.2?
>
> $ find /usr/include -name '*acpi*'
> /usr/include/asm/acpi.h
> /usr/include/asm-x86_64/acpi.h
> /usr/include/asm-i386/acpi.h
> /usr/include/linux/acpi.h
> /usr/include/linux/pci-acpi.h
>
> They are not present on a Fedora Core 6 system.
No idea. I never used them and I don't know any user space tool using
them.
They were already present in SLES9 or even earlier.
Don't know how to determine whether any of them gets used by any
application, but I doubt they are used.
I had a quick look at the glibc sources, I couldn't find anything
explicitly adding acpi kernel headers, they may get added by accident
through some regex.
What is the reason you ask this for, do you get name clashes with other
programs, should they get reverted for cleanup reasons?
Thomas
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: /usr/include/*/acpi.h
2007-01-04 8:45 ` /usr/include/*/acpi.h Thomas Renninger
@ 2007-01-04 10:49 ` Thorsten Kukuk
2007-01-04 11:02 ` /usr/include/*/acpi.h Alexey Starikovskiy
0 siblings, 1 reply; 6+ messages in thread
From: Thorsten Kukuk @ 2007-01-04 10:49 UTC (permalink / raw)
To: Thomas Renninger; +Cc: Len Brown, linux-acpi, pbaudis
On Thu, Jan 04, Thomas Renninger wrote:
> On Wed, 2007-01-03 at 15:52 -0500, Len Brown wrote:
> > Thomas,
> > Why do the following files appear in OpenSuse 10.2?
> >
> > $ find /usr/include -name '*acpi*'
> > /usr/include/asm/acpi.h
> > /usr/include/asm-x86_64/acpi.h
> > /usr/include/asm-i386/acpi.h
> > /usr/include/linux/acpi.h
> > /usr/include/linux/pci-acpi.h
> >
> > They are not present on a Fedora Core 6 system.
>
> No idea. I never used them and I don't know any user space tool using
> them.
This header files are part of the linux kernel, and thus of course
available in /usr/include/{asm,linux}.
Thorsten
--
Thorsten Kukuk http://www.suse.de/~kukuk/ kukuk@suse.de
SUSE LINUX Products GmbH Maxfeldstr. 5 D-90409 Nuernberg
--------------------------------------------------------------------
Key fingerprint = 8C6B FD92 EE0F 42ED F91A 6A73 6D1A 7F05 2E59 24BB
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: /usr/include/*/acpi.h
2007-01-04 10:49 ` /usr/include/*/acpi.h Thorsten Kukuk
@ 2007-01-04 11:02 ` Alexey Starikovskiy
2007-01-04 15:15 ` /usr/include/*/acpi.h Len Brown
0 siblings, 1 reply; 6+ messages in thread
From: Alexey Starikovskiy @ 2007-01-04 11:02 UTC (permalink / raw)
To: Thorsten Kukuk; +Cc: Thomas Renninger, Len Brown, linux-acpi, pbaudis
Thorsten Kukuk wrote:
> On Thu, Jan 04, Thomas Renninger wrote:
>
>
>> On Wed, 2007-01-03 at 15:52 -0500, Len Brown wrote:
>>
>>> Thomas,
>>> Why do the following files appear in OpenSuse 10.2?
>>>
>>> $ find /usr/include -name '*acpi*'
>>> /usr/include/asm/acpi.h
>>> /usr/include/asm-x86_64/acpi.h
>>> /usr/include/asm-i386/acpi.h
>>> /usr/include/linux/acpi.h
>>> /usr/include/linux/pci-acpi.h
>>>
>>> They are not present on a Fedora Core 6 system.
>>>
>> No idea. I never used them and I don't know any user space tool using
>> them.
>>
>
> This header files are part of the linux kernel, and thus of course
> available in /usr/include/{asm,linux}.
>
> Thorsten
>
>
Not all kernel headers have a meaning to user space, and not all of them
should be available there.
More, none of the ACPI linux kernel headers have meaning to user space
applications, thus they "of course"
should not be available.
Regards,
Alex.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: /usr/include/*/acpi.h
2007-01-04 11:02 ` /usr/include/*/acpi.h Alexey Starikovskiy
@ 2007-01-04 15:15 ` Len Brown
2007-01-04 15:48 ` /usr/include/*/acpi.h Petr Baudis
0 siblings, 1 reply; 6+ messages in thread
From: Len Brown @ 2007-01-04 15:15 UTC (permalink / raw)
To: Alexey Starikovskiy
Cc: Thorsten Kukuk, Thomas Renninger, linux-acpi, pbaudis,
Linux Kernel Mailing List
> >>> Why do the following files appear in OpenSuse 10.2?
> >>>
> >>> $ find /usr/include -name '*acpi*'
> >>> /usr/include/asm/acpi.h
> >>> /usr/include/asm-x86_64/acpi.h
> >>> /usr/include/asm-i386/acpi.h
> >>> /usr/include/linux/acpi.h
> >>> /usr/include/linux/pci-acpi.h
> >>>
> >>> They are not present on a Fedora Core 6 system.
> >>>
> >> No idea. I never used them and I don't know any user space tool using
> >> them.
> >>
> >> What is the reason you ask this for, do you get name clashes with other
> >> programs, should they get reverted for cleanup reasons?
Cleanup reasons.
I want to know what the constraints are for who sees what header.
Right now we have some issues with all kinds of ACPICA core-internal stuff being
exported to the rest of the kernel. Makes sense to think about what is
exported to user-space while thinking about it -- and I just happened
to notice that OS and FC are different here.
> > This header files are part of the linux kernel, and thus of course
> > available in /usr/include/{asm,linux}.
So you pick up all of the kernel include/linux and include/asm*?
(but exclude include/acpi/, which is as much a kernel header as the above)
What in user-space looks at linux/*.h and what kind of stuff should we
be exporting there -- or not exporting there?
linux/acpi.h has its entire contents inside #ifdef CONFIG_ACPI
and Fedora Core ships without it -- so it seems a pretty safe bet that
if anything in user-space is using it, then it must be pretty obscure.
ACPI is, after-all, a kernel/BIOS interface -- and to the extent that we expose
it to user-space we have certainly failed to abstract it.
I don't see any harm in user-space seeing linux/acpi.h, but I also see no benefit.
We could delete it, but we could not delete the asm/acpi.h files which
are equally useless to user-space.
I'm thinking that we should move the core internal stuff (most of include/acpi/)
under drivers/acpi where only the core can see it. (2.4 did it this way, as so
lots of drivers in 2.6) Perhaps linux/acpi.h should be the place where non-core
parts of the Linux kernel pick up what they need to know to talk to the ACPI sub-system.
Unclear what to do about visibility to user-space.
I don't see us wanting to export anything, so the goal is to not pollute user-space
as cleanly as possible.
-Len
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: /usr/include/*/acpi.h
2007-01-04 15:15 ` /usr/include/*/acpi.h Len Brown
@ 2007-01-04 15:48 ` Petr Baudis
0 siblings, 0 replies; 6+ messages in thread
From: Petr Baudis @ 2007-01-04 15:48 UTC (permalink / raw)
To: Len Brown
Cc: Alexey Starikovskiy, Thorsten Kukuk, Thomas Renninger, linux-acpi,
Linux Kernel Mailing List
On Thu, Jan 04, 2007 at 04:15:45PM CET, Len Brown wrote:
> > > This header files are part of the linux kernel, and thus of course
> > > available in /usr/include/{asm,linux}.
>
> So you pick up all of the kernel include/linux and include/asm*?
> (but exclude include/acpi/, which is as much a kernel header as the above)
Yes, we do not exclude any files from the kernel headers package, since
it is safer to have an extra file there than miss something that
something in userspace *could* need - or that is not needed now but can
silently become useful for something userspace in the future. An "all
headers part of the linux kernel" is much safer definition than "a
somewhat random selection of kernel headers".
--
Petr "Pasky" Baudis
Stuff: http://pasky.or.cz/
The meaning of Stonehenge in Traflamadorian, when viewed from above, is:
"Replacement part being rushed with all possible speed."
-- Kurt Vonnegut, Sirens from Titan
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2007-01-04 15:48 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2007-01-03 20:52 /usr/include/*/acpi.h Len Brown
2007-01-04 8:45 ` /usr/include/*/acpi.h Thomas Renninger
2007-01-04 10:49 ` /usr/include/*/acpi.h Thorsten Kukuk
2007-01-04 11:02 ` /usr/include/*/acpi.h Alexey Starikovskiy
2007-01-04 15:15 ` /usr/include/*/acpi.h Len Brown
2007-01-04 15:48 ` /usr/include/*/acpi.h Petr Baudis
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