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Some kernels, for example linux-yocto 3.19 for qemux86, fail to
execute /init in an initramfs unless there is already a /dev/console
char device in the initramfs. Booting then fails with:
Kernel panic - not syncing: /dev/console is missing or not a character device!
Please ensure your rootfs is properly configured
The panic itself comes from a linux-yocto specific patch to
kernel_init_freeable in init/main.c, but even without it, that
function will print an error when /dev/console is missing. The
kernel's Documentation/initrd.txt also mentions creating that device.
It remained unclear why this is not a problem on other machines. On
intel-corei7-64 from meta-intel, something (the kernel?) creates
/dev/console and /dev/[012] before transfering control to the init
script. In that case, creating /dev/console in advance is not
necessary, but does not cause any problem either.
(From OE-Core rev: 1b64664f0c388f41084f5db6e46e3e68c53fb6d9)
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
22 lines
513 B
BlitzBasic
22 lines
513 B
BlitzBasic
SUMMARY = "Live image init script"
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LICENSE = "MIT"
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LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
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DEPENDS = "virtual/kernel"
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RDEPENDS_${PN} = "udev udev-extraconf"
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SRC_URI = "file://init-live.sh"
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PR = "r12"
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S = "${WORKDIR}"
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do_install() {
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install -m 0755 ${WORKDIR}/init-live.sh ${D}/init
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install -d ${D}/dev
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mknod -m 622 ${D}/dev/console c 5 1
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}
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FILES_${PN} += " /init /dev "
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# Due to kernel dependency
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PACKAGE_ARCH = "${MACHINE_ARCH}"
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