]> git.ipfire.org Git - people/ms/linux.git/blame - usr/Makefile
mm: prevent page_frag_alloc() from corrupting the memory
[people/ms/linux.git] / usr / Makefile
CommitLineData
b2441318 1# SPDX-License-Identifier: GPL-2.0
d39a206b
SR
2#
3# kbuild file for usr/ - including initramfs image
4#
1da177e4 5
a5575df5 6compress-y := copy
65e00e04
MY
7compress-$(CONFIG_INITRAMFS_COMPRESSION_GZIP) := gzip
8compress-$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) := bzip2
9compress-$(CONFIG_INITRAMFS_COMPRESSION_LZMA) := lzma
10compress-$(CONFIG_INITRAMFS_COMPRESSION_XZ) := xzmisc
11compress-$(CONFIG_INITRAMFS_COMPRESSION_LZO) := lzo
12compress-$(CONFIG_INITRAMFS_COMPRESSION_LZ4) := lz4
a30d8a39 13compress-$(CONFIG_INITRAMFS_COMPRESSION_ZSTD) := zstd
6ae64e42 14
6ae64e42 15obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
1da177e4 16
65e00e04 17$(obj)/initramfs_data.o: $(obj)/initramfs_inc_data
1da177e4 18
129ab0d2 19ramfs-input := $(CONFIG_INITRAMFS_SOURCE)
65e00e04
MY
20cpio-data :=
21
22# If CONFIG_INITRAMFS_SOURCE is empty, generate a small initramfs with the
23# default contents.
24ifeq ($(ramfs-input),)
25ramfs-input := $(srctree)/$(src)/default_cpio_list
26endif
27
28ifeq ($(words $(ramfs-input)),1)
29
30# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with
31# .cpio, use it directly as an initramfs.
32ifneq ($(filter %.cpio,$(ramfs-input)),)
33cpio-data := $(ramfs-input)
34endif
35
36# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with
37# .cpio.*, use it directly as an initramfs, and avoid double compression.
38ifeq ($(words $(subst .cpio.,$(space),$(ramfs-input))),2)
39cpio-data := $(ramfs-input)
a5575df5 40compress-y := copy
65e00e04
MY
41endif
42
43endif
44
45# For other cases, generate the initramfs cpio archive based on the contents
46# specified by CONFIG_INITRAMFS_SOURCE.
47ifeq ($(cpio-data),)
48
49cpio-data := $(obj)/initramfs_data.cpio
d39a206b 50
5f2fb52f 51hostprogs := gen_init_cpio
d39a206b 52
65e00e04 53# .initramfs_data.cpio.d is used to identify all files included
d39a206b
SR
54# in initramfs and to detect if any files are added/removed.
55# Removed files are identified by directory timestamp being updated
56# The dependency list is generated by gen_initramfs.sh -l
65e00e04 57-include $(obj)/.initramfs_data.cpio.d
9e3596b0 58
58a2f7d8
SR
59# do not try to update files included in initramfs
60$(deps_initramfs): ;
61
65e00e04
MY
62quiet_cmd_initfs = GEN $@
63 cmd_initfs = \
64 $(CONFIG_SHELL) $< -o $@ -l $(obj)/.initramfs_data.cpio.d \
65 $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
66 $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) \
67 $(ramfs-input)
68
a26ee60f 69# We rebuild initramfs_data.cpio if:
c7fe0608 70# 1) Any included file is newer than initramfs_data.cpio
d39a206b 71# 2) There are changes in which files are included (added or deleted)
a26ee60f 72# 3) If gen_init_cpio are newer than initramfs_data.cpio
c7fe0608 73# 4) Arguments to gen_initramfs.sh changes
65e00e04 74$(obj)/initramfs_data.cpio: $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE
d39a206b 75 $(call if_changed,initfs)
d6fc9fcb 76
65e00e04
MY
77endif
78
79$(obj)/initramfs_inc_data: $(cpio-data) FORCE
80 $(call if_changed,$(compress-y))
81
82targets += initramfs_data.cpio initramfs_inc_data
83
d6fc9fcb 84subdir-$(CONFIG_UAPI_HEADER_TEST) += include