# # kbuild file for usr/ - including initramfs image # klibcdirs:; # Generate builtin.o based on initramfs_data.o obj-y := initramfs_data.o # initramfs_data.o contains the initramfs_data.cpio.gz image. # The image is included using .incbin, a dependency which is not # tracked automatically. $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE ##### # Generate the initramfs cpio archive hostprogs-y := gen_init_cpio initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ $(CONFIG_INITRAMFS_SOURCE),-d) ramfs-args := \ $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) # .initramfs_data.cpio.gz.d is used to identify all files included # in initramfs and to detect if any files are added/removed. # Removed files are identified by directory timestamp being updated # The dependency list is generated by gen_initramfs.sh -l ifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),) include $(obj)/.initramfs_data.cpio.gz.d endif quiet_cmd_initfs = GEN $@ cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) targets := initramfs_data.cpio.gz $(deps_initramfs): klibcdirs # We rebuild initramfs_data.cpio.gz if: # 1) Any included file is newer then initramfs_data.cpio.gz # 2) There are changes in which files are included (added or deleted) # 3) If gen_init_cpio are newer than initramfs_data.cpio.gz # 4) arguments to gen_initramfs.sh changes $(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d $(call if_changed,initfs)