Build problems with Linux 2.5

Build problems with Linux 2.5

[Jay Denebeim]

(.70, but I doubt that makes a difference)

Hi guys,

  I've been way out of kernel compiling for a long time, however I just
took a job writing device drivers on Linux so I guess I'll be doing quite
a bit of it again.  I've not built a kernel other than an occasional 'make
rpm' on redhat since the 2.0 days, so be gentle with me.

  The problem I'm having is with the kernel.  My environment is a standard 
Redhat 9 installation:

gcc-3.2.2-5
binutils-2.13.90.0.18-9
modutils-2.4.22-8
kernel-smp-2.4.20-9

  The problem I'm having seems to be related to modutils.  When I make 
very many modules I can't install the system because depmod can't find 
symbols undery 2.4.  However using nm I can see that those symbols are 
indeed defined.  If I make a bare bones system and only have the two or 
three modules I need (I'm working with SCSI device drivers and need to 
unload/reload the modules) the depmod passes, but the modprobe fails with 
QM_MODULES: function unimplemented.

  So, I went grepping through the source code and QM_MODULES exists in 
linux/module.h in 2.4, but not in 2.5.  Since modutils depends on that 
functionality heavily modutils must have been re-written.  However the 
latest version I can find on kernel.org is 2.4.25 and it still uses 
QM_MODULES.  So, where is it?

  Are there other things I'm going to need for 2.5?  I've already figured 
out LVM is totally different, and that breaks mkinitrd if I've got root on 
a logical volume.  Anything else?

  Thanks in advance for your time.

  Jay

-- 
* Jay Denebeim  Moderator       rec.arts.sf.tv.babylon5.moderated *
* newsgroup submission address: b5mod@deepthot.org                *
* moderator contact address:    b5mod-request@deepthot.org        *
* personal contact address:     denebeim@deepthot.org             *

Re: Build problems with Linux 2.5

[Sam Ravnborg]

On Wed, Jun 11, 2003 at 01:26:33PM -0700, Jay Denebeim wrote:
> (.70, but I doubt that makes a difference)
> 
> Hi guys,
> 
>   I've been way out of kernel compiling for a long time, however I just
> took a job writing device drivers on Linux so I guess I'll be doing quite
> a bit of it again.  I've not built a kernel other than an occasional 'make
> rpm' on redhat since the 2.0 days, so be gentle with me.

Two pointers:
http://www.codemonkey.org.uk/post-halloween-2.5.txt

This is good, and answer your QM_MODULES question + more.
lwn.net - has a good article serie about driver porting to 2.5

	Sam

Re: Build problems with Linux 2.5

[Mark Haverkamp]

On Wed, 2003-06-11 at 13:26, Jay Denebeim wrote:
> (.70, but I doubt that makes a difference)
> 
> Hi guys,
> 
>   I've been way out of kernel compiling for a long time, however I just
> took a job writing device drivers on Linux so I guess I'll be doing quite
> a bit of it again.  I've not built a kernel other than an occasional 'make
> rpm' on redhat since the 2.0 days, so be gentle with me.
> 
>   The problem I'm having is with the kernel.  My environment is a standard 
> Redhat 9 installation:
> 
> gcc-3.2.2-5
> binutils-2.13.90.0.18-9
> modutils-2.4.22-8
> kernel-smp-2.4.20-9
> 
>   The problem I'm having seems to be related to modutils.  When I make 
> very many modules I can't install the system because depmod can't find 
> symbols undery 2.4.  However using nm I can see that those symbols are 
> indeed defined.  If I make a bare bones system and only have the two or 
> three modules I need (I'm working with SCSI device drivers and need to 
> unload/reload the modules) the depmod passes, but the modprobe fails with 
> QM_MODULES: function unimplemented.
> 
>   So, I went grepping through the source code and QM_MODULES exists in 
> linux/module.h in 2.4, but not in 2.5.  Since modutils depends on that 
> functionality heavily modutils must have been re-written.  However the 
> latest version I can find on kernel.org is 2.4.25 and it still uses 
> QM_MODULES.  So, where is it?


http://www.kernel.org/pub/linux/kernel/people/rusty/modules/


> 
>   Are there other things I'm going to need for 2.5?  I've already figured 
> out LVM is totally different, and that breaks mkinitrd if I've got root on 
> a logical volume.  Anything else?
> 
>   Thanks in advance for your time.
> 
>   Jay
-- 
Mark Haverkamp <markh@osdl.org>

Re: Build problems with Linux 2.5

[Bryan O'Sullivan]

On Wed, 2003-06-11 at 13:26, Jay Denebeim wrote:

>   The problem I'm having seems to be related to modutils.

You need to use module-init-tools.

http://www.kernel.org/pub/linux/kernel/people/rusty/modules/

Read the docs before you build and install it, so that it continues to
work with modutils.

	<b

Re: Build problems with Linux 2.5

[Vincent Hanquez]

On Wed, Jun 11, 2003 at 01:26:33PM -0700, Jay Denebeim wrote:
>   The problem I'm having seems to be related to modutils.  When I make 
> very many modules I can't install the system because depmod can't find 
> symbols undery 2.4.  However using nm I can see that those symbols are 
> indeed defined.  If I make a bare bones system and only have the two or 
> three modules I need (I'm working with SCSI device drivers and need to 
> unload/reload the modules) the depmod passes, but the modprobe fails with 
> QM_MODULES: function unimplemented.

you have to install module-init-tools (0.9.12 latest)

(isn't it in the FAQ ?)
-- 
Tab