error building kernel with initramfs

Hi,

if you select gzip compression for the rootfs.cpio file (BR2_TARGET_ROOTFS_CPIO_GZIP), then the rebuild of the kernel with initramfs is going to fail:

>>> Generating root filesystem image rootfs.cpio
if [ ! -e /var/lib/buildbot/build-arm-1.8/build/output/target/init ]; then /usr/bin/install -m 0755 fs/cpio/init /var/lib/buildbot/build-arm-1.8/build/output/target/init; fi
rm -f /var/lib/buildbot/build-arm-1.8/build/output/build/_fakeroot.fs
touch /var/lib/buildbot/build-arm-1.8/build/output/build/.fakeroot.00000
cat /var/lib/buildbot/build-arm-1.8/build/output/build/.fakeroot* > /var/lib/buildbot/build-arm-1.8/build/output/build/_fakeroot.fs
echo "chown -R 0:0 /var/lib/buildbot/build-arm-1.8/build/output/target" >> /var/lib/buildbot/build-arm-1.8/build/output/build/_fakeroot.fs
cat target/generic/device_table.txt > /var/lib/buildbot/build-arm-1.8/build/output/build/_device_table.txt
echo "/var/lib/buildbot/build-arm-1.8/build/output/host/usr/bin/makedevs -d /var/lib/buildbot/build-arm-1.8/build/output/build/_device_table.txt /var/lib/buildbot/build-arm-1.8/build/output/target" >> /var/lib/buildbot/build-arm-1.8/build/output/build/_fakeroot.fs
echo " cd /var/lib/buildbot/build-arm-1.8/build/output/target && find . | cpio --quiet -o -H newc > /var/lib/buildbot/build-arm-1.8/build/output/images/rootfs.cpio" >> /var/lib/buildbot/build-arm-1.8/build/output/build/_fakeroot.fs
chmod a+x /var/lib/buildbot/build-arm-1.8/build/output/build/_fakeroot.fs
/var/lib/buildbot/build-arm-1.8/build/output/host/usr/bin/fakeroot -- /var/lib/buildbot/build-arm-1.8/build/output/build/_fakeroot.fs
rootdir=/var/lib/buildbot/build-arm-1.8/build/output/target
table='/var/lib/buildbot/build-arm-1.8/build/output/build/_device_table.txt'
gzip -9 -f /var/lib/buildbot/build-arm-1.8/build/output/images/rootfs.cpio
>>> Rebuilding kernel with initramfs
# Build the kernel.
PATH="/var/lib/buildbot/build-arm-1.8/build/output/host/bin:/var/lib/buildbot/build-arm-1.8/build/output/host/usr/bin:/var/lib/buildbot/build-arm-1.8/build/output/host/usr/sbin/:/usr/local/bin:/usr/bin:/bin:/usr/games" PERLLIB="/var/lib/buildbot/build-arm-1.8/build/output/host/usr/lib/perl" /usr/bin/make -j4 HOSTCC="/usr/bin/gcc" HOSTCFLAGS="" ARCH=arm INSTALL_MOD_PATH=/var/lib/buildbot/build-arm-1.8/build/output/target CROSS_COMPILE=" /var/lib/buildbot/build-arm-1.8/build/output/host/usr/bin/arm-unknown-linux-uclibcgnueabi-" LZMA="/var/lib/buildbot/build-arm-1.8/build/output/host/usr/bin/lzma" -C /var/lib/buildbot/build-arm-1.8/build/output/build/linux-3.0.4 uImage make[1]: Entering directory `/var/lib/buildbot/build-arm-1.8/build/output/build/linux-3.0.4'
CHK include/linux/version.h
CHK include/generated/utsrelease.h
make[2]: `include/generated/mach-types.h' is up to date.
CALL scripts/checksyscalls.sh
/var/lib/buildbot/build-arm-1.8/build/output/build/linux-3.0.4/scripts/gen_initramfs_list.sh: Cannot open '/var/lib/buildbot/build-arm-1.8/build/output/images/rootfs.cpio'
make[2]: *** [usr/initramfs_data.cpio.gz] Error 1
CHK include/generated/compile.h
make[1]: *** [usr] Error 2
make[1]: *** Waiting for unfinished jobs....
make[1]: *** wait: No child processes. Stop.
make: *** [/var/lib/buildbot/build-arm-1.8/build/output/build/linux-3.0.4/.stamp_initramfs_rebuilt] Error 2

I guess the fix for this is to change fs/initramfs/Config.in to select BR2_TARGET_ROOTFS_CPIO_NONE, right ?

Sven

Le Sat, 08 Oct 2011 00:49:08 +0200,
Sven Neumann <[email protected]> a ?crit :

Yes, I guess so.

Thomas

Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

Sven> Hi,
Sven> if you select gzip compression for the rootfs.cpio file Sven> (BR2_TARGET_ROOTFS_CPIO_GZIP), then the rebuild of the kernel with Sven> initramfs is going to fail:

Odd, that's not what I'm seeing here.

in fs/common.mk the compression stuff is handled by creating the compressed variant IN ADDITION to the uncompressed file, E.G.:

gzip -9 -c /home/peko/source/buildroot/test/images/rootfs.cpio > \
/home/peko/source/buildroot/test/images/rootfs.cpio.gz

So output/images/rootfs.cpio still exists when the kernel is rebuilt.

Bye, Peter Korsgaard