From 0352841cd92f6316bcac092e2fff9d28c352b36b Mon Sep 17 00:00:00 2001 From: Patrick Ohly Date: Thu, 3 Sep 2015 20:42:27 +0200 Subject: 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 Signed-off-by: Richard Purdie --- meta/recipes-core/initrdscripts/initramfs-framework_1.0.bb | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'meta/recipes-core/initrdscripts') 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" -- cgit v1.2.3