CentOS - Nov 2006 - Get error msg if try to use kernel makefile / build kernel

Using the new method for building a standalone kernel module
(although seems to happen with the traditional way as well)
I get "mach_mpspec.h: No such file or directory"

Same result if I try to do a kernel 'make'.

Subsequently I get MAX_MP_BUSSES and MAX_IRQ_SOURCES undeclared.

This should surely work 'out of the box' with Centos ?

Any ideas about what's missing ?

Thanks,
MikeW

MikeW <mw_phil at ...> writes:
>
> Using the new method for building a standalone kernel module
> (although seems to happen with the traditional way as well)
> I get "mach_mpspec.h: No such file or directory"
>
> Thanks,
> MikeW
> 
PS. version is 2.6.9-42.0.3.EL-i686

MikeW <mw_phil at ...> writes:
> 
> Using the new method for building a standalone kernel module
> (although seems to happen with the traditional way as well)
> I get "mach_mpspec.h: No such file or directory"
> 
> Same result if I try to do a kernel 'make'.
> 
> Subsequently I get MAX_MP_BUSSES and MAX_IRQ_SOURCES undeclared.
> 
> This should surely work 'out of the box' with Centos ?
> 
> Any ideas about what's missing ?
> 
> Thanks,
> MikeW
> 
Sorted it by adding -I$(KERNELDIR)/include/asm-i386/mach-default to my
make CFLAGS.

Already had KERNELDIR set to /lib/modules/2.6.9-42.0.3.EL/build

Even if this isn't the 'correct' fix, it seems to work ...

Mike

On Mon, 2006-11-27 at 15:33 +0000, MikeW wrote:
> Using the new method for building a standalone kernel module
> (although seems to happen with the traditional way as well)
> I get "mach_mpspec.h: No such file or directory"
> 
> Same result if I try to do a kernel 'make'.
> 
> Subsequently I get MAX_MP_BUSSES and MAX_IRQ_SOURCES undeclared.
> 
> This should surely work 'out of the box' with Centos ?
> 
> Any ideas about what's missing ?
You don't like the kernels I build ?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
URL:
<http://lists.centos.org/pipermail/centos/attachments/20061127/e34b646d/attachment-0002.sig>

Johnny Hughes <mailing-lists at ...> writes:
> 
> On Mon, 2006-11-27 at 15:33 +0000, MikeW wrote:
> > Using the new method for building a standalone kernel module
> > (although seems to happen with the traditional way as well)
> > I get "mach_mpspec.h: No such file or directory"
> > 
> > Same result if I try to do a kernel 'make'.
> > 
> > Subsequently I get MAX_MP_BUSSES and MAX_IRQ_SOURCES undeclared.
> > 
> > This should surely work 'out of the box' with Centos ?
> > 
> > Any ideas about what's missing ?
> 
> You don't like the kernels I build ?
I have been out of driver development since late 2.4 and was unfamiliar
with the 'new' kernel module build procedure, which uses the kernel
build makefile ("make -C $(KERNELDIR) M=$(PWD) modules")
rather than just doing a gcc on the module with a few extra flags.

Hence did not know why I was getting an error in an apparently
'vanilla' build, which I thought should work with just the kernel
dir being specified.

I could see the file in question existed in another dir, but thought
it was not a true 'fix' to just add that path to the include paths.

I imagine I am missing something like an ARCH setting or something,
but have not seen anything documented about setting this.

I also note from Googling that others have had the same error,
(not necessarily with Centos, so it's not a distro problem)
but suggestions for them usually involved "install kernel source",
obviously not required in my case - in any case the headers should
suffice.

Thanks,
MikeW