From: Greg Thelen <gthelen@xxxxxxxxxx>
Subject: kbuild: clean compressed initramfs image
Since 9e3596b0c653 ("kbuild: initramfs cleanup, set target from Kconfig")
"make clean" leaves behind compressed initramfs images. Example:
$ make defconfig
$ sed -i 's|CONFIG_INITRAMFS_SOURCE=""|CONFIG_INITRAMFS_SOURCE="/tmp/ir.cpio"|' .config
$ make olddefconfig
$ make -s
$ make -s clean
$ git clean -ndxf | grep initramfs
Would remove usr/initramfs_data.cpio.gz
clean rules do not have CONFIG_* context so they do not know which
compression format was used. Thus they don't know which files to delete.
Tell clean to delete all possible compression formats.
Once patched usr/initramfs_data.cpio.gz and friends are deleted by
"make clean".
Link: http://lkml.kernel.org/r/20190722063251.55541-1-gthelen@xxxxxxxxxx
Fixes: 9e3596b0c653 ("kbuild: initramfs cleanup, set target from Kconfig")
Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
usr/Makefile | 3 +++
1 file changed, 3 insertions(+)
--- a/usr/Makefile~kbuild-clean-compressed-initramfs-image
+++ a/usr/Makefile
@@ -11,6 +11,9 @@ datafile_y = initramfs_data.cpio$(suffix
datafile_d_y = .$(datafile_y).d
AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)"
+# clean rules do not have CONFIG_INITRAMFS_COMPRESSION. So clean up after all
+# possible compression formats.
+clean-files += initramfs_data.cpio*
# Generate builtin.o based on initramfs_data.o
obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
_
