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| 2 |
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| 3 |
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| 4 |
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| 5 | klibcdirs:;
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| 6 | PHONY += klibcdirs
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| 7 |
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| 8 | suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION))
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| 9 | datafile_y = initramfs_data.cpio$(suffix_y)
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| 10 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)"
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| 11 |
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| 12 |
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| 13 | # Generate builtin.o based on initramfs_data.o
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| 14 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
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| 15 |
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| 16 | # initramfs_data.o contains the compressed initramfs_data.cpio image.
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| 17 | # The image is included using .incbin, a dependency which is not
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| 18 | # tracked automatically.
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| 19 | $(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE
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| 20 |
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| 21 | #####
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| 22 | # Generate the initramfs cpio archive
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| 23 |
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| 24 | hostprogs-y := gen_init_cpio
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| 25 | initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
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| 26 | ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
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| 27 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
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| 28 | ramfs-args := \
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| 29 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
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| 30 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
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| 31 |
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| 32 | # .initramfs_data.cpio.d is used to identify all files included
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| 33 | # in initramfs and to detect if any files are added/removed.
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| 34 | # Removed files are identified by directory timestamp being updated
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| 35 | # The dependency list is generated by gen_initramfs.sh -l
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| 36 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),)
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| 37 | include $(obj)/.initramfs_data.cpio.d
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| 38 | endif
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| 39 |
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| 40 | quiet_cmd_initfs = GEN $@
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| 41 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
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| 42 |
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| 43 | targets := $(datafile_y)
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| 44 |
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| 45 | # do not try to update files included in initramfs
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| 46 | $(deps_initramfs): ;
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| 47 |
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| 48 | $(deps_initramfs): klibcdirs
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| 49 | # We rebuild initramfs_data.cpio if:
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| 50 | # 1) Any included file is newer then initramfs_data.cpio
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| 51 | # 2) There are changes in which files are included (added or deleted)
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| 52 | # 3) If gen_init_cpio are newer than initramfs_data.cpio
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| 53 | # 4) arguments to gen_initramfs.sh changes
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| 54 | $(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
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| 55 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d
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| 56 | $(call if_changed,initfs)
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