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authorPatrick Ohly <patrick.ohly@intel.com>2015-09-03 20:42:27 +0200
committerRichard Purdie <richard.purdie@linuxfoundation.org>2015-09-06 15:24:23 +0100
commit0352841cd92f6316bcac092e2fff9d28c352b36b (patch)
tree713f442983d22fa11da6f7361c3249af97b8ef13
parent37741c539f5d3021e59828b49e968cd42b89a368 (diff)
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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.bb7
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"