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cc9ff1a86a
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: 0352841cd92f6316bcac092e2fff9d28c352b36b)
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
67 lines
1.8 KiB
BlitzBasic
67 lines
1.8 KiB
BlitzBasic
SUMMARY = "Modular initramfs system"
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LICENSE = "MIT"
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LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
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RDEPENDS_${PN} += "busybox"
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PR = "r2"
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inherit allarch
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SRC_URI = "file://init \
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file://finish \
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file://mdev \
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file://udev \
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file://e2fs \
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file://debug"
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S = "${WORKDIR}"
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do_install() {
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install -d ${D}/init.d
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# base
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install -m 0755 ${WORKDIR}/init ${D}/init
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install -m 0755 ${WORKDIR}/finish ${D}/init.d/99-finish
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# mdev
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install -m 0755 ${WORKDIR}/mdev ${D}/init.d/01-mdev
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# udev
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install -m 0755 ${WORKDIR}/udev ${D}/init.d/01-udev
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# e2fs
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install -m 0755 ${WORKDIR}/e2fs ${D}/init.d/10-e2fs
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# debug
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install -m 0755 ${WORKDIR}/debug ${D}/init.d/00-debug
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# Create device nodes expected by some kernels in initramfs
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# before even executing /init.
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install -d ${D}/dev
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mknod -m 622 ${D}/dev/console c 5 1
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}
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PACKAGES = "${PN}-base \
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initramfs-module-mdev \
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initramfs-module-udev \
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initramfs-module-e2fs \
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initramfs-module-debug"
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FILES_${PN}-base = "/init /init.d/99-finish /dev"
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SUMMARY_initramfs-module-mdev = "initramfs support for mdev"
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RDEPENDS_initramfs-module-mdev = "${PN}-base"
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FILES_initramfs-module-mdev = "/init.d/01-mdev"
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SUMMARY_initramfs-module-udev = "initramfs support for udev"
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RDEPENDS_initramfs-module-udev = "${PN}-base udev"
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FILES_initramfs-module-udev = "/init.d/01-udev"
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SUMMARY_initramfs-module-e2fs = "initramfs support for ext4/ext3/ext2 filesystems"
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RDEPENDS_initramfs-module-e2fs = "${PN}-base"
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FILES_initramfs-module-e2fs = "/init.d/10-e2fs"
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SUMMARY_initramfs-module-debug = "initramfs dynamic debug support"
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RDEPENDS_initramfs-module-debug = "${PN}-base"
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FILES_initramfs-module-debug = "/init.d/00-debug"
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