[PATCH 2/2] kbuild: Move gen_init_cpio and gen_initramfs.sh to scripts/

[Nicolas Schier <nsc@kernel.org>]

get_init_cpio and gen_initramfs.sh are part of kbuild and required for
all kernel builds.  Move it to scripts/ to be more clear about their
importance.

Link: https://lore.kernel.org/all/aSdrCFkUQup3qb-q@derry.ads.avm.de/
Signed-off-by: Nicolas Schier <nsc@kernel.org>
---

Nathan, could this go through kbuild-fixes even though it is not really
a fix?  Introducing a top-level Makefile target 'usr_gen_init_cpio'
in v7.0 and renaming it to 'scripts/gen_init_cpio` in v7.1 doesn't sound
good to me.
---
 MAINTAINERS                       |  1 +
 Makefile                          | 10 +++++-----
 scripts/.gitignore                |  1 +
 scripts/Makefile                  |  2 ++
 {usr => scripts}/gen_init_cpio.c  |  0
 {usr => scripts}/gen_initramfs.sh |  2 +-
 scripts/remove-stale-files        |  2 ++
 usr/.gitignore                    |  4 +++-
 usr/Makefile                      |  4 +---
 9 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 55af015174a5..0e374c92941f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13833,6 +13833,7 @@ F:	scripts/basic/
 F:	scripts/clang-tools/
 F:	scripts/container
 F:	scripts/dummy-tools/
+F:	scripts/gen_init*
 F:	scripts/include/
 F:	scripts/install.sh
 F:	scripts/mk*
diff --git a/Makefile b/Makefile
index 0e788ce45457..7798863002ac 100644
--- a/Makefile
+++ b/Makefile
@@ -296,7 +296,7 @@ no-dot-config-targets := $(clean-targets) \
 			 $(version_h) headers headers_% archheaders archscripts \
 			 %asm-generic kernelversion %src-pkg dt_binding_check \
 			 outputmakefile rustavailable rustfmt rustfmtcheck \
-			 usr_gen_init_cpio \
+			 scripts/gen_init_cpio \
 			 run-command
 no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \
 			  image_name
@@ -1437,9 +1437,9 @@ ifdef CONFIG_HEADERS_INSTALL
 prepare: headers
 endif
 
-PHONY += usr_gen_init_cpio
-usr_gen_init_cpio: scripts_basic
-	$(Q)$(MAKE) $(build)=usr usr/gen_init_cpio
+PHONY += scripts/gen_init_cpio
+scripts/gen_init_cpio: scripts_basic
+	$(Q)$(MAKE) $(build)=scripts scripts/gen_init_cpio
 
 PHONY += scripts_unifdef
 scripts_unifdef: scripts_basic
@@ -1709,7 +1709,7 @@ distclean: mrproper
 # Packaging of the kernel to various formats
 # ---------------------------------------------------------------------------
 
-modules-cpio-pkg: usr_gen_init_cpio
+modules-cpio-pkg: scripts/gen_init_cpio
 
 %src-pkg: FORCE
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 4215c2208f7e..700456543910 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 /asn1_compiler
+/gen_init_cpio
 /gen_packed_field_checks
 /generate_rust_target
 /insert-sys-cert
diff --git a/scripts/Makefile b/scripts/Makefile
index 0941e5ce7b57..039863cd064e 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -52,6 +52,8 @@ ifdef CONFIG_BUILDTIME_MCOUNT_SORT
 HOSTCFLAGS_sorttable.o += -DMCOUNT_SORT_ENABLED
 endif
 
+hostprogs-always-y += gen_init_cpio
+
 # The following programs are only built on demand
 hostprogs += unifdef gen_packed_field_checks
 
diff --git a/usr/gen_init_cpio.c b/scripts/gen_init_cpio.c
similarity index 100%
rename from usr/gen_init_cpio.c
rename to scripts/gen_init_cpio.c
diff --git a/usr/gen_initramfs.sh b/scripts/gen_initramfs.sh
similarity index 99%
rename from usr/gen_initramfs.sh
rename to scripts/gen_initramfs.sh
index 7eba2fddf0ef..27ac1fd48001 100755
--- a/usr/gen_initramfs.sh
+++ b/scripts/gen_initramfs.sh
@@ -247,4 +247,4 @@ done
 
 # If output_file is set we will generate cpio archive
 # we are careful to delete tmp files
-usr/gen_init_cpio $output $timestamp $cpio_list
+scripts/gen_init_cpio $output $timestamp $cpio_list
diff --git a/scripts/remove-stale-files b/scripts/remove-stale-files
index 6e39fa8540df..e46337e4bfb8 100755
--- a/scripts/remove-stale-files
+++ b/scripts/remove-stale-files
@@ -26,3 +26,5 @@ rm -f scripts/selinux/genheaders/genheaders
 rm -f *.spec
 
 rm -f lib/test_fortify.log
+
+rm -f usr/gen_init_cpio
diff --git a/usr/.gitignore b/usr/.gitignore
index 8996e7a88902..13bf7a38355c 100644
--- a/usr/.gitignore
+++ b/usr/.gitignore
@@ -1,4 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
-/gen_init_cpio
 /initramfs_data.cpio
 /initramfs_inc_data
+
+# Keep around until cleanup in scripts/remove-stale-files
+/gen_init_cpio
diff --git a/usr/Makefile b/usr/Makefile
index e8f42478a0b7..5b97ee66c00a 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -16,8 +16,6 @@ obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
 
 $(obj)/initramfs_data.o: $(obj)/initramfs_inc_data
 
-hostprogs := gen_init_cpio
-
 ramfs-input := $(CONFIG_INITRAMFS_SOURCE)
 cpio-data :=
 
@@ -72,7 +70,7 @@ quiet_cmd_initfs = GEN     $@
 # 2) There are changes in which files are included (added or deleted)
 # 3) If gen_init_cpio are newer than initramfs_data.cpio
 # 4) Arguments to gen_initramfs.sh changes
-$(obj)/initramfs_data.cpio: $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE
+$(obj)/initramfs_data.cpio: $(srctree)/scripts/gen_initramfs.sh scripts/gen_init_cpio $(deps_initramfs) FORCE
 	$(call if_changed,initfs)
 
 endif

-- 
2.51.0