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kernel: allow different TARGET_DIR for initramfs

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Allow Kernel/CompileImage/Initramfs to use a different rootfs location.
If the additional arg is not defined, TARGET_DIR is used by default.

This allows the caller to customize the kernel initramfs for different
rootfs.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
[ simplify commit and rework commit description ]
Link: https://github.com/openwrt/openwrt/pull/12959
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
This commit is contained in:
Luiz Angelo Daros de Luca 2023-08-03 19:05:13 -03:00 committed by Christian Marangi
parent 4a2f712f85
commit 4209eb7505
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GPG Key ID: AC001D09ADBFEAD7
1 changed files with 8 additions and 7 deletions
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15
include/kernel-defaults.mk
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@ -57,7 +57,7 @@ ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
define Kernel/SetInitramfs/PreConfigure
grep -v -e INITRAMFS -e CONFIG_RD_ -e CONFIG_BLK_DEV_INITRD $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
echo 'CONFIG_BLK_DEV_INITRD=y' >> $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(1) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
endef
else
define Kernel/SetInitramfs/PreConfigure
@ -70,7 +70,7 @@ endif
define Kernel/SetInitramfs
rm -f $(LINUX_DIR)/.config.prev
mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
$(call Kernel/SetInitramfs/PreConfigure)
$(call Kernel/SetInitramfs/PreConfigure,$(1))
echo "# CONFIG_INITRAMFS_PRESERVE_MTIME is not set" >> $(LINUX_DIR)/.config
ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
@ -120,7 +120,7 @@ define Kernel/Configure/Default
endef
define Kernel/Configure/Initramfs
$(call Kernel/SetInitramfs)
$(call Kernel/SetInitramfs,$(1))
endef
define Kernel/CompileModules/Default
@ -158,16 +158,17 @@ define Kernel/CompileImage/Default
endef
ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
# $1: Custom TARGET_DIR. If omitted TARGET_DIR is used.
define Kernel/CompileImage/Initramfs
$(call Kernel/Configure/Initramfs)
$(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(TARGET_DIR)/init
$(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(TARGET_DIR) $(TARGET_DIR)/init)
$(call Kernel/Configure/Initramfs,$(if $(1),$(1),$(TARGET_DIR)))
$(CP) $(GENERIC_PLATFORM_DIR)/other-files/init $(if $(1),$(1),$(TARGET_DIR))/init
$(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(if $(1),$(1),$(TARGET_DIR)) $(if $(1),$(1),$(TARGET_DIR))/init)
rm -rf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/usr/initramfs_data.cpio*
ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE),y)
ifneq ($(call qstrip,$(CONFIG_EXTERNAL_CPIO)),)
$(CP) $(CONFIG_EXTERNAL_CPIO) $(KERNEL_BUILD_DIR)/initrd.cpio
else
( cd $(TARGET_DIR); find . | LC_ALL=C sort | $(STAGING_DIR_HOST)/bin/cpio --reproducible -o -H newc -R 0:0 > $(KERNEL_BUILD_DIR)/initrd.cpio )
( cd $(if $(1),$(1),$(TARGET_DIR)); find . | LC_ALL=C sort | $(STAGING_DIR_HOST)/bin/cpio --reproducible -o -H newc -R 0:0 > $(KERNEL_BUILD_DIR)/initrd.cpio )
endif
$(if $(SOURCE_DATE_EPOCH),touch -hcd "@$(SOURCE_DATE_EPOCH)" $(KERNEL_BUILD_DIR)/initrd.cpio)
$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),$(STAGING_DIR_HOST)/bin/bzip2 -9 -c < $(KERNEL_BUILD_DIR)/initrd.cpio > $(KERNEL_BUILD_DIR)/initrd.cpio.bzip2)