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cpio: fix boot with dynamic /dev

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Devtmpfs doesn't get automounted by the kernel when an initramfs is used.
Since cpio archives are used almost exclusively as an initramfs, the same
fix should be applied to it as for the initramfs.

Cfr. commit 424888e474 and
10a130f91e.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Arnout Vandecappelle (Essensium/Mind) 2011-09-06 23:16:08 +02:00 committed by Peter Korsgaard
parent 0a775837fb
commit 3fac21ef8d
2 changed files with 26 additions and 5 deletions
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24
fs/cpio/cpio.mk
View File

@ -4,15 +4,29 @@
#
#############################################################
define ROOTFS_CPIO_INIT_SYMLINK
rm -f $(TARGET_DIR)/init
ln -s sbin/init $(TARGET_DIR)/init
ifeq ($(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
define ROOTFS_CPIO_ADD_INIT
if [ ! -e $(TARGET_DIR)/init ]; then \
ln -sf sbin/init $(TARGET_DIR)/init; \
fi
endef
ROOTFS_CPIO_PRE_GEN_HOOKS += ROOTFS_CPIO_INIT_SYMLINK
else
# devtmpfs does not get automounted when initramfs is used.
# Add a pre-init script to mount it before running init
define ROOTFS_CPIO_ADD_INIT
if [ ! -e $(TARGET_DIR)/init ]; then \
$(INSTALL) -m 0755 fs/cpio/init $(TARGET_DIR)/init; \
fi
endef
endif # BR2_ROOTFS_DEVICE_CREATION_STATIC
ROOTFS_CPIO_PRE_GEN_HOOKS += ROOTFS_CPIO_ADD_INIT
define ROOTFS_CPIO_CMD
cd $(TARGET_DIR) && find . | cpio --quiet -o -H newc > $$@
endef
$(eval $(call ROOTFS_TARGET,cpio))
$(eval $(call ROOTFS_TARGET,cpio))

7
fs/cpio/init Executable file
View File

@ -0,0 +1,7 @@
#!/bin/sh
# devtmpfs does not get automounted for initramfs
/bin/mount -t devtmpfs devtmpfs /dev
exec 0</dev/console
exec 1>/dev/console
exec 2>/dev/console
exec /sbin/init $*