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| author |   Patrick Ohly <patrick.ohly@intel.com> | 2015-09-03 20:42:27 +0200 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2015-09-06 15:24:23 +0100 |
| commit | 0352841cd92f6316bcac092e2fff9d28c352b36b (patch) | |
| tree | 713f442983d22fa11da6f7361c3249af97b8ef13 | |
| parent | 37741c539f5d3021e59828b49e968cd42b89a368 (diff) | |
| download | openembedded-core-contrib-0352841cd92f6316bcac092e2fff9d28c352b36b.tar.gz | |
initramfs-framework: create /dev/console
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.
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
| -rw-r--r-- | meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb index 89b900dba9..6c37b9aef6 100644 --- a/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb +++ b/meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb @@ -34,6 +34,11 @@ do_install() { # debug install -m 0755 ${WORKDIR}/debug ${D}/init.d/00-debug + + # Create device nodes expected by some kernels in initramfs + # before even executing /init. + install -d ${D}/dev + mknod -m 622 ${D}/dev/console c 5 1 } PACKAGES = "${PN}-base \ @@ -42,7 +47,7 @@ PACKAGES = "${PN}-base \ initramfs-module-e2fs \ initramfs-module-debug" -FILES_${PN}-base = "/init /init.d/99-finish" +FILES_${PN}-base = "/init /init.d/99-finish /dev" SUMMARY_initramfs-module-mdev = "initramfs support for mdev" RDEPENDS_initramfs-module-mdev = "${PN}-base" |