Help needed: Devkit header files not upto date with kernel headers

Help needed: Devkit header files not upto date with kernel headers

[Nelson, Sam]

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Hello all,
The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does not match the same file from the kernel tree.
For example
Comparing the following 2 files, they are different.
sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.h
and
sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uapi/linux/ethtool.h

Looking into some details, the /usr/include/linux/ethtool.h, seems to come from the libc package.

Any ideas on what can be wrong in the recipes will be helpful.  Is there any way to update the user space header files to match the kernel header files?

With regards,
Sam



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Re: Help needed: Devkit header files not upto date with kernel headers

[Denys Dmytriyenko]

On Tue, Jul 09, 2013 at 11:30:35AM -0400, Nelson, Sam wrote:
>    Hello all,
> 
>    The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does
>    not match the same file from the kernel tree.

That's normal. There's a difference between kernel and user-space facing 
headers.

http://kernelnewbies.org/KernelHeaders


>    For example
> 
>    Comparing the following 2 files, they are different.
> 
>    sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.h
> 
>    and
> 
>    sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uapi/linux/ethtool.h
> 
>     
> 
>    Looking into some details, the /usr/include/linux/ethtool.h, seems to come
>    from the libc package.

Yes, those are different even on my host machine. The first is marked as 
_LINUX_ETHTOOL_H and the second one as _UAPI_LINUX_ETHTOOL_H

http://lwn.net/Articles/113349/
http://lwn.net/Articles/507794/


>    Any ideas on what can be wrong in the recipes will be helpful.  Is there
>    any way to update the user space header files to match the kernel header
>    files?

There is a special recipe for that - linux-libc-headers.

-- 
Denys

Re: Help needed: Devkit header files not upto date with kernel headers

[Nelson, Sam]

Understand the user space headers and kernel space headers are different in general.
But in this case, I am comparing the files under "uapi" directory. Which I assume is actually meant for user space api.
Am I wrong on this?
Given that , I expected the header file will be updated in building the devkit.  

For example if we have update on an "uapi" header file , as part of a kernel patch,  Don't we expect the corresponding header file in devkit to be updated?
Appreciate your comments.

With regards,
Sam


-----Original Message-----
From: Dmytriyenko, Denys 
Sent: Tuesday, July 09, 2013 11:40 AM
To: Nelson, Sam
Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
Subject: Re: Help needed: Devkit header files not upto date with kernel headers

On Tue, Jul 09, 2013 at 11:30:35AM -0400, Nelson, Sam wrote:
>    Hello all,
> 
>    The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does
>    not match the same file from the kernel tree.

That's normal. There's a difference between kernel and user-space facing headers.

http://kernelnewbies.org/KernelHeaders


>    For example
> 
>    Comparing the following 2 files, they are different.
> 
>    
> sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.
> h
> 
>    and
> 
>    
> sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uap
> i/linux/ethtool.h
> 
>     
> 
>    Looking into some details, the /usr/include/linux/ethtool.h, seems to come
>    from the libc package.

Yes, those are different even on my host machine. The first is marked as _LINUX_ETHTOOL_H and the second one as _UAPI_LINUX_ETHTOOL_H

http://lwn.net/Articles/113349/
http://lwn.net/Articles/507794/


>    Any ideas on what can be wrong in the recipes will be helpful.  Is there
>    any way to update the user space header files to match the kernel header
>    files?

There is a special recipe for that - linux-libc-headers.

--
Denys

Re: Help needed: Devkit header files not upto date with kernel headers

[Denys Dmytriyenko]

Sam,

Please see my last comment - there's a separate recipe for user-space kernel 
headers. The headers need to be properly exported, you cannot just use the 
ones from the kernel directly. Hence they are detached - updating the header 
in the kernel tree does not automatically update exported headers for the user 
space in linux-libc-headers.

-- 
Denys


On Tue, Jul 09, 2013 at 12:00:34PM -0400, Nelson, Sam wrote:
> Understand the user space headers and kernel space headers are different in 
> general. But in this case, I am comparing the files under "uapi" directory. 
> Which I assume is actually meant for user space api. Am I wrong on this? 
> Given that , I expected the header file will be updated in building the 
> devkit.
> 
> For example if we have update on an "uapi" header file , as part of a kernel 
> patch, Don't we expect the corresponding header file in devkit to be 
> updated? Appreciate your comments.
> 
> With regards,
> Sam
> 
> 
> -----Original Message-----
> From: Dmytriyenko, Denys 
> Sent: Tuesday, July 09, 2013 11:40 AM
> To: Nelson, Sam
> Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> 
> On Tue, Jul 09, 2013 at 11:30:35AM -0400, Nelson, Sam wrote:
> >    Hello all,
> > 
> >    The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does
> >    not match the same file from the kernel tree.
> 
> That's normal. There's a difference between kernel and user-space facing headers.
> 
> http://kernelnewbies.org/KernelHeaders
> 
> 
> >    For example
> > 
> >    Comparing the following 2 files, they are different.
> > 
> >    
> > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.
> > h
> > 
> >    and
> > 
> >    
> > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uap
> > i/linux/ethtool.h
> > 
> >     
> > 
> >    Looking into some details, the /usr/include/linux/ethtool.h, seems to come
> >    from the libc package.
> 
> Yes, those are different even on my host machine. The first is marked as _LINUX_ETHTOOL_H and the second one as _UAPI_LINUX_ETHTOOL_H
> 
> http://lwn.net/Articles/113349/
> http://lwn.net/Articles/507794/
> 
> 
> >    Any ideas on what can be wrong in the recipes will be helpful.  Is there
> >    any way to update the user space header files to match the kernel header
> >    files?
> 
> There is a special recipe for that - linux-libc-headers.
> 
> --
> Denys

Re: Help needed: Devkit header files not upto date with kernel headers

[Nelson, Sam]

Thanks for the detailed information.
So  to update the headers I need to make changes in the linux-libc-headers recipe?

Specifically, any update needed in 
oe-core/meta/recipes-kernel/linux-libc-headers/linux-libc-header.inc
or 
do I need to add a new recipe for the 3.8.4 header similar to the other recipes?

oe-core/meta/recipes-kernel/linux-libc-headers$ ls
linux-libc-headers           linux-libc-headers_3.4.3.bb
linux-libc-headers_3.0.8.bb  linux-libc-headers.inc
linux-libc-headers_3.2.bb

Any guidelines on what to update to get the latest headers for 3.8.4 kernel will be helpful.

with regards,
sam

-----Original Message-----
From: Dmytriyenko, Denys 
Sent: Tuesday, July 09, 2013 12:07 PM
To: Nelson, Sam
Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
Subject: Re: Help needed: Devkit header files not upto date with kernel headers

Sam,

Please see my last comment - there's a separate recipe for user-space kernel headers. The headers need to be properly exported, you cannot just use the ones from the kernel directly. Hence they are detached - updating the header in the kernel tree does not automatically update exported headers for the user space in linux-libc-headers.

-- 
Denys


On Tue, Jul 09, 2013 at 12:00:34PM -0400, Nelson, Sam wrote:
> Understand the user space headers and kernel space headers are different in 
> general. But in this case, I am comparing the files under "uapi" directory. 
> Which I assume is actually meant for user space api. Am I wrong on this? 
> Given that , I expected the header file will be updated in building the 
> devkit.
> 
> For example if we have update on an "uapi" header file , as part of a kernel 
> patch, Don't we expect the corresponding header file in devkit to be 
> updated? Appreciate your comments.
> 
> With regards,
> Sam
> 
> 
> -----Original Message-----
> From: Dmytriyenko, Denys 
> Sent: Tuesday, July 09, 2013 11:40 AM
> To: Nelson, Sam
> Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> 
> On Tue, Jul 09, 2013 at 11:30:35AM -0400, Nelson, Sam wrote:
> >    Hello all,
> > 
> >    The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does
> >    not match the same file from the kernel tree.
> 
> That's normal. There's a difference between kernel and user-space facing headers.
> 
> http://kernelnewbies.org/KernelHeaders
> 
> 
> >    For example
> > 
> >    Comparing the following 2 files, they are different.
> > 
> >    
> > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.
> > h
> > 
> >    and
> > 
> >    
> > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uap
> > i/linux/ethtool.h
> > 
> >     
> > 
> >    Looking into some details, the /usr/include/linux/ethtool.h, seems to come
> >    from the libc package.
> 
> Yes, those are different even on my host machine. The first is marked as _LINUX_ETHTOOL_H and the second one as _UAPI_LINUX_ETHTOOL_H
> 
> http://lwn.net/Articles/113349/
> http://lwn.net/Articles/507794/
> 
> 
> >    Any ideas on what can be wrong in the recipes will be helpful.  Is there
> >    any way to update the user space header files to match the kernel header
> >    files?
> 
> There is a special recipe for that - linux-libc-headers.
> 
> --
> Denys

Re: Help needed: Devkit header files not upto date with kernel headers

[Denys Dmytriyenko]

On Tue, Jul 09, 2013 at 02:18:24PM -0400, Nelson, Sam wrote:
> Thanks for the detailed information.
> So  to update the headers I need to make changes in the linux-libc-headers recipe?
> 
> Specifically, any update needed in 
> oe-core/meta/recipes-kernel/linux-libc-headers/linux-libc-header.inc
> or 
> do I need to add a new recipe for the 3.8.4 header similar to the other recipes?
> 
> oe-core/meta/recipes-kernel/linux-libc-headers$ ls
> linux-libc-headers           linux-libc-headers_3.4.3.bb
> linux-libc-headers_3.0.8.bb  linux-libc-headers.inc
> linux-libc-headers_3.2.bb
> 
> Any guidelines on what to update to get the latest headers for 3.8.4 kernel will be helpful.

The easiest solution is to switch to using Dylan branches, once meta-arago is 
fully converted in the near future, which gives you linux-libc-headers-3.8 for 
free. Another option is to back-port it to Danny.

-- 
Denys


> -----Original Message-----
> From: Dmytriyenko, Denys 
> Sent: Tuesday, July 09, 2013 12:07 PM
> To: Nelson, Sam
> Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> 
> Sam,
> 
> Please see my last comment - there's a separate recipe for user-space kernel headers. The headers need to be properly exported, you cannot just use the ones from the kernel directly. Hence they are detached - updating the header in the kernel tree does not automatically update exported headers for the user space in linux-libc-headers.
> 
> -- 
> Denys
> 
> 
> On Tue, Jul 09, 2013 at 12:00:34PM -0400, Nelson, Sam wrote:
> > Understand the user space headers and kernel space headers are different in 
> > general. But in this case, I am comparing the files under "uapi" directory. 
> > Which I assume is actually meant for user space api. Am I wrong on this? 
> > Given that , I expected the header file will be updated in building the 
> > devkit.
> > 
> > For example if we have update on an "uapi" header file , as part of a kernel 
> > patch, Don't we expect the corresponding header file in devkit to be 
> > updated? Appreciate your comments.
> > 
> > With regards,
> > Sam
> > 
> > 
> > -----Original Message-----
> > From: Dmytriyenko, Denys 
> > Sent: Tuesday, July 09, 2013 11:40 AM
> > To: Nelson, Sam
> > Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> > Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> > 
> > On Tue, Jul 09, 2013 at 11:30:35AM -0400, Nelson, Sam wrote:
> > >    Hello all,
> > > 
> > >    The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does
> > >    not match the same file from the kernel tree.
> > 
> > That's normal. There's a difference between kernel and user-space facing headers.
> > 
> > http://kernelnewbies.org/KernelHeaders
> > 
> > 
> > >    For example
> > > 
> > >    Comparing the following 2 files, they are different.
> > > 
> > >    
> > > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.
> > > h
> > > 
> > >    and
> > > 
> > >    
> > > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uap
> > > i/linux/ethtool.h
> > > 
> > >     
> > > 
> > >    Looking into some details, the /usr/include/linux/ethtool.h, seems to come
> > >    from the libc package.
> > 
> > Yes, those are different even on my host machine. The first is marked as _LINUX_ETHTOOL_H and the second one as _UAPI_LINUX_ETHTOOL_H
> > 
> > http://lwn.net/Articles/113349/
> > http://lwn.net/Articles/507794/
> > 
> > 
> > >    Any ideas on what can be wrong in the recipes will be helpful.  Is there
> > >    any way to update the user space header files to match the kernel header
> > >    files?
> > 
> > There is a special recipe for that - linux-libc-headers.
> > 
> > --
> > Denys

Re: Help needed: Devkit header files not upto date with kernel headers

[Nelson, Sam]

If I have to back port, can you give me a list of files I may need to merge.

Appreciate your help.
Sam


-----Original Message-----
From: Dmytriyenko, Denys 
Sent: Tuesday, July 09, 2013 2:38 PM
To: Nelson, Sam
Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
Subject: Re: Help needed: Devkit header files not upto date with kernel headers

On Tue, Jul 09, 2013 at 02:18:24PM -0400, Nelson, Sam wrote:
> Thanks for the detailed information.
> So  to update the headers I need to make changes in the linux-libc-headers recipe?
> 
> Specifically, any update needed in
> oe-core/meta/recipes-kernel/linux-libc-headers/linux-libc-header.inc
> or
> do I need to add a new recipe for the 3.8.4 header similar to the other recipes?
> 
> oe-core/meta/recipes-kernel/linux-libc-headers$ ls
> linux-libc-headers           linux-libc-headers_3.4.3.bb
> linux-libc-headers_3.0.8.bb  linux-libc-headers.inc 
> linux-libc-headers_3.2.bb
> 
> Any guidelines on what to update to get the latest headers for 3.8.4 kernel will be helpful.

The easiest solution is to switch to using Dylan branches, once meta-arago is fully converted in the near future, which gives you linux-libc-headers-3.8 for free. Another option is to back-port it to Danny.

--
Denys


> -----Original Message-----
> From: Dmytriyenko, Denys 
> Sent: Tuesday, July 09, 2013 12:07 PM
> To: Nelson, Sam
> Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> 
> Sam,
> 
> Please see my last comment - there's a separate recipe for user-space kernel headers. The headers need to be properly exported, you cannot just use the ones from the kernel directly. Hence they are detached - updating the header in the kernel tree does not automatically update exported headers for the user space in linux-libc-headers.
> 
> -- 
> Denys
> 
> 
> On Tue, Jul 09, 2013 at 12:00:34PM -0400, Nelson, Sam wrote:
> > Understand the user space headers and kernel space headers are different in 
> > general. But in this case, I am comparing the files under "uapi" directory. 
> > Which I assume is actually meant for user space api. Am I wrong on this? 
> > Given that , I expected the header file will be updated in building the 
> > devkit.
> > 
> > For example if we have update on an "uapi" header file , as part of a kernel 
> > patch, Don't we expect the corresponding header file in devkit to be 
> > updated? Appreciate your comments.
> > 
> > With regards,
> > Sam
> > 
> > 
> > -----Original Message-----
> > From: Dmytriyenko, Denys 
> > Sent: Tuesday, July 09, 2013 11:40 AM
> > To: Nelson, Sam
> > Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> > Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> > 
> > On Tue, Jul 09, 2013 at 11:30:35AM -0400, Nelson, Sam wrote:
> > >    Hello all,
> > > 
> > >    The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does
> > >    not match the same file from the kernel tree.
> > 
> > That's normal. There's a difference between kernel and user-space facing headers.
> > 
> > http://kernelnewbies.org/KernelHeaders
> > 
> > 
> > >    For example
> > > 
> > >    Comparing the following 2 files, they are different.
> > > 
> > >    
> > > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.
> > > h
> > > 
> > >    and
> > > 
> > >    
> > > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uap
> > > i/linux/ethtool.h
> > > 
> > >     
> > > 
> > >    Looking into some details, the /usr/include/linux/ethtool.h, seems to come
> > >    from the libc package.
> > 
> > Yes, those are different even on my host machine. The first is marked as _LINUX_ETHTOOL_H and the second one as _UAPI_LINUX_ETHTOOL_H
> > 
> > http://lwn.net/Articles/113349/
> > http://lwn.net/Articles/507794/
> > 
> > 
> > >    Any ideas on what can be wrong in the recipes will be helpful.  Is there
> > >    any way to update the user space header files to match the kernel header
> > >    files?
> > 
> > There is a special recipe for that - linux-libc-headers.
> > 
> > --
> > Denys

Re: Help needed: Devkit header files not upto date with kernel headers

[Denys Dmytriyenko]

On Wed, Jul 10, 2013 at 12:02:35PM -0400, Nelson, Sam wrote:
> If I have to back port, can you give me a list of files I may need to merge.

Sam,

Just one file linux-libc-headers_3.8.bb should be enough.

-- 
Denys


> -----Original Message-----
> From: Dmytriyenko, Denys 
> Sent: Tuesday, July 09, 2013 2:38 PM
> To: Nelson, Sam
> Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> 
> On Tue, Jul 09, 2013 at 02:18:24PM -0400, Nelson, Sam wrote:
> > Thanks for the detailed information.
> > So  to update the headers I need to make changes in the linux-libc-headers recipe?
> > 
> > Specifically, any update needed in
> > oe-core/meta/recipes-kernel/linux-libc-headers/linux-libc-header.inc
> > or
> > do I need to add a new recipe for the 3.8.4 header similar to the other recipes?
> > 
> > oe-core/meta/recipes-kernel/linux-libc-headers$ ls
> > linux-libc-headers           linux-libc-headers_3.4.3.bb
> > linux-libc-headers_3.0.8.bb  linux-libc-headers.inc 
> > linux-libc-headers_3.2.bb
> > 
> > Any guidelines on what to update to get the latest headers for 3.8.4 kernel will be helpful.
> 
> The easiest solution is to switch to using Dylan branches, once meta-arago is fully converted in the near future, which gives you linux-libc-headers-3.8 for free. Another option is to back-port it to Danny.
> 
> --
> Denys
> 
> 
> > -----Original Message-----
> > From: Dmytriyenko, Denys 
> > Sent: Tuesday, July 09, 2013 12:07 PM
> > To: Nelson, Sam
> > Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> > Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> > 
> > Sam,
> > 
> > Please see my last comment - there's a separate recipe for user-space kernel headers. The headers need to be properly exported, you cannot just use the ones from the kernel directly. Hence they are detached - updating the header in the kernel tree does not automatically update exported headers for the user space in linux-libc-headers.
> > 
> > -- 
> > Denys
> > 
> > 
> > On Tue, Jul 09, 2013 at 12:00:34PM -0400, Nelson, Sam wrote:
> > > Understand the user space headers and kernel space headers are different in 
> > > general. But in this case, I am comparing the files under "uapi" directory. 
> > > Which I assume is actually meant for user space api. Am I wrong on this? 
> > > Given that , I expected the header file will be updated in building the 
> > > devkit.
> > > 
> > > For example if we have update on an "uapi" header file , as part of a kernel 
> > > patch, Don't we expect the corresponding header file in devkit to be 
> > > updated? Appreciate your comments.
> > > 
> > > With regards,
> > > Sam
> > > 
> > > 
> > > -----Original Message-----
> > > From: Dmytriyenko, Denys 
> > > Sent: Tuesday, July 09, 2013 11:40 AM
> > > To: Nelson, Sam
> > > Cc: meta-arago@arago-project.org; Karicheri, Muralidharan; Shilimkar, Santosh
> > > Subject: Re: Help needed: Devkit header files not upto date with kernel headers
> > > 
> > > On Tue, Jul 09, 2013 at 11:30:35AM -0400, Nelson, Sam wrote:
> > > >    Hello all,
> > > > 
> > > >    The header files under sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi does
> > > >    not match the same file from the kernel tree.
> > > 
> > > That's normal. There's a difference between kernel and user-space facing headers.
> > > 
> > > http://kernelnewbies.org/KernelHeaders
> > > 
> > > 
> > > >    For example
> > > > 
> > > >    Comparing the following 2 files, they are different.
> > > > 
> > > >    
> > > > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/include/linux/ethtool.
> > > > h
> > > > 
> > > >    and
> > > > 
> > > >    
> > > > sysroots/armv7ahf-vfp-neon-oe-linux-gnueabi/usr/src/kernel/include/uap
> > > > i/linux/ethtool.h
> > > > 
> > > >     
> > > > 
> > > >    Looking into some details, the /usr/include/linux/ethtool.h, seems to come
> > > >    from the libc package.
> > > 
> > > Yes, those are different even on my host machine. The first is marked as _LINUX_ETHTOOL_H and the second one as _UAPI_LINUX_ETHTOOL_H
> > > 
> > > http://lwn.net/Articles/113349/
> > > http://lwn.net/Articles/507794/
> > > 
> > > 
> > > >    Any ideas on what can be wrong in the recipes will be helpful.  Is there
> > > >    any way to update the user space header files to match the kernel header
> > > >    files?
> > > 
> > > There is a special recipe for that - linux-libc-headers.
> > > 
> > > --
> > > Denys