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Allow targets to specify extra initramfs source files

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The CONFIG_INITRAMFS_SOURCE Kconfig variable can be a space-separated
list of source files (or directories). This allows a platform to
add extra components to the initramfs image, by defining the
INITRAMFS_EXTRA_FILES make var.

By default, we add a simple initramfs extra file for the generic-2.6
platform, which specifies a few device nodes.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9410 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2007-10-23 06:23:29 +00:00
parent 63aabec89b
commit 957fd804f1
2 changed files with 12 additions and 1 deletions
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4
include/kernel-defaults.mk
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@ -40,6 +40,8 @@ KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
ARCH="$(LINUX_KARCH)" \
CONFIG_SHELL="$(BASH)"
INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
ifneq (,$(KERNEL_CC))
KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
endif
@ -78,7 +80,7 @@ ifeq ($(KERNEL),2.6)
define Kernel/SetInitramfs
mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_SOURCE="$(TARGET_DIR)"' >> $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
endef

9
target/linux/generic-2.6/image/initramfs-base-files.txt Normal file
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@ -0,0 +1,9 @@
nod /dev/console 600 0 0 c 5 1
nod /dev/null 666 0 0 c 1 3
nod /dev/zero 666 0 0 c 1 5
nod /dev/tty 666 0 0 c 5 0
nod /dev/tty0 660 0 0 c 4 0
nod /dev/tty1 660 0 0 c 4 1
nod /dev/random 666 0 0 c 1 8
nod /dev/urandom 666 0 0 c 1 9
dir /dev/pts 755 0 0