[debian-non-standard] [OpenWrt-Users] building a kernel to boot debian - build process strips out lots of kernel module options

[Martin Steigerwald]

Am Samstag, 16. Juni 2012 schrieb Martin Steigerwald:
> Am Samstag, 16. Juni 2012 schrieb Martin Steigerwald:
> > Am Samstag, 16. Juni 2012 schrieb Martin Steigerwald:
> > > Hi!
> > > 
> > > I am just trying to use OpenWrt to build a kernel for my Debian
> > > Squeeze on ASUS WL-500 gP installation which still uses 2.6.30 from
> > > 
> > > http://wpkg.org/files/debian-asus/2.6.30/
> > > 
> > > 
> > > This is with
> > > 
> > > URL: svn://svn.openwrt.org/openwrt/trunk
> > > Revision: 32384
> > 
> > […]
> > 
> > > Thus I went for the official make kernel_menuconfig approach. The
> > > kernel is now build.
> > > 
> > > But OpenWrt build process still doesn´t take all modules for the
> > > effective kernel configuration in
> > > trunk/build_dir/linux-brcm47xx/linux-3.3.8/.config. I have
> > > configured:
> > > 
> > > martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk/target/linux/brcm47
> > > xx
> > > 
> > > > grep "=m" config-3.3
> > > 
> > > CONFIG_BLK_DEV_CRYPTOLOOP=m
> > > CONFIG_BLK_DEV_LOOP=m
> > > CONFIG_BLK_DEV_NBD=m
> > 
> > [ … lots of options enabled as modules …]
> > 
> > > But I still get:
> > > 
> > > martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk/build_dir/linux-
> > > brcm47xx/linux-3.3.8> grep "=m" .config
> > > CONFIG_IOSCHED_CFQ=m
> > > CONFIG_NET_SCH_CBQ=m
> > > CONFIG_NET_SCH_MULTIQ=m
> > 
> > [… way less options enabled as modules as in original configuration
> > …]
> > 
> > I think this has to do with the magic in include/kernel-defaults.mk:
> > 
> > define Kernel/Configure/Default
> > 
> >         $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target
> > 
> > # copy CONFIG_KERNEL_* settings over to .config.target
> > 
> >         awk
> > 
> > '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");pri
> > nt }' $(TOPDIR)/.config >>
> > $(LINUX_DIR)/.config.target
> > 
> >         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >>
> > 
> > $(LINUX_DIR)/.config.target
> > 
> >         echo "# CONFIG_KALLSYMS_ALL is not set" >>
> > 
> > $(LINUX_DIR)/.config.target
> > 
> >         echo "# CONFIG_KPROBES is not set" >>
> > 
> > $(LINUX_DIR)/.config.target $(SCRIPT_DIR)/metadata.pl kconfig
> > $(TMP_DIR)/.packageinfo $(TOPDIR)/.config >
> > $(LINUX_DIR)/.config.override
> > 
> >         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target
> > 
> > /dev/null $(LINUX_DIR)/.config.override >
> > $(LINUX_DIR)/.config
> > 
> >         $(call Kernel/SetInitramfs)
> >         -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare
> >         scripts rm -rf $(KERNEL_BUILD_DIR)/modules
> >         $(MAKE) $(KERNEL_MAKEOPTS)
> > 
> > INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
> > 
> >         $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort
> >         |
> > 
> > md5s
> > 
> > > $(LINUX_DIR)/.vermagic
> > 
> > endef
> > 
> > martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk/target/linux/brcm47xx
> > > grep =m config-3.3 | wc -l
> > 211
> > 
> > martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk/build_dir/linux-
> > brcm47xx/linux-3.3.8> grep =m .config.target | wc -l
> > 212
> > martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk/build_dir/linux-
> > brcm47xx/linux-3.3.8> grep =m .config.old | wc -l
> > 71
> > martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk/build_dir/linux-
> > brcm47xx/linux-3.3.8> grep =m .config | wc -l
> > 48
> > martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk/build_dir/linux-
> > brcm47xx/linux-3.3.8>
> 
> I think I cracked it - the other approach didn´t work - no it compiled
> those modules - I just clear .config.override prior to kconfig.pl ;):
> 
> martin at merkaba:~/Computer/Gayatri/OpenWRT/trunk> diff -u
> include/kernel-defaults.mk.orig include/kernel-defaults.mk ---
> include/kernel-defaults.mk.orig     2012-06-15 21:34:22.858217640
> +0200 +++ include/kernel-defaults.mk  2012-06-16 10:59:39.347091053
> +0200 @@ -102,6 +102,7 @@
>         echo "# CONFIG_KALLSYMS_ALL is not set" >>
> $(LINUX_DIR)/.config.target echo "# CONFIG_KPROBES is not set" >>
> $(LINUX_DIR)/.config.target $(SCRIPT_DIR)/metadata.pl kconfig
> $(TMP_DIR)/.packageinfo $(TOPDIR)/.config >
> $(LINUX_DIR)/.config.override +       echo >
> $(LINUX_DIR)/.config.override
>         $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target
> /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
>         $(call Kernel/SetInitramfs)
>         -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
> @@ -112,7 +113,10 @@
> 
>  define Kernel/CompileModules/Default
>         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
> +       rm -rf /tmp/openwrt-modules
> +       mkdir -p /tmp/openwrt-modules
>         +$(MAKE) $(KERNEL_MAKEOPTS) modules
> +       +$(MAKE) $(KERNEL_MAKEOPTS)
> INSTALL_MOD_PATH=/tmp/openwrt-modules modules_install endef
> 
>  OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug
> -R .note.gnu.build-id
> 
> 
> Lets see whether this thing actually will boot after I copied the
> modules to the USB stick and flashed the kernel.

Well it doesn´t. It doesn´t seem to access the USB thumb drive.

For now I use

gayatri:~# cat /proc/version 
Linux version 2.6.34.5 (amain MAGIC amain-laptop) (gcc version 4.3.3 (GCC) 
) #1 Sun Sep 26 18:20:27 CEST 2010

from

http://www.debwrt.net/download/releases/latest/

This one works.

Attached are configs in case someone spots an obvious mistake.

I do not have soldered a serial cable for my ASUS WL-500g Premium v1.

Maybe I try building DebWrt again.

Ciao,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7