Subject: + makefile-export-initial-ramdisk-compression-config-option.patch added to -mm tree
To: ppandit@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 10 Oct 2013 14:30:03 -0700
The patch titled
Subject: ./Makefile: export initial ramdisk compression config option
has been added to the -mm tree. Its filename is
makefile-export-initial-ramdisk-compression-config-option.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/makefile-export-initial-ramdisk-compression-config-option.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/makefile-export-initial-ramdisk-compression-config-option.patch
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From: P J P <ppandit@xxxxxxxxxx>
Subject: ./Makefile: export initial ramdisk compression config option
Make menuconfig allows one to choose compression format of an initial
ramdisk image. But this choice does not result in duly compressed ramdisk
image. Because - $ make install - does not pass on the selected
compression choice to the dracut(8) tool, which creates the initramfs
file. dracut(8) generates the image with the default compression, ie.
gzip(1).
This patch exports the selected compression option to a sub-shell
environment, so that it could be used by dracut(8) tool to generate
appropriately compressed initramfs images.
There isn't a straightforward way to pass on options to dracut(8) via
positional parameters. Because it is indirectly invoked at the end of a $
make install sequence.
# make install
-> arch/$arch/boot/Makefile
-> arch/$arch/boot/install.sh
-> /sbing/installkernel ...
-> /sbin/new-kernel-pkg ...
-> /sbin/dracut ...
Signed-off-by: P J P <ppandit@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Makefile | 16 ++++++++++++++++
init/do_mounts_rd.c | 5 +++++
2 files changed, 21 insertions(+)
diff -puN Makefile~makefile-export-initial-ramdisk-compression-config-option Makefile
--- a/Makefile~makefile-export-initial-ramdisk-compression-config-option
+++ a/Makefile
@@ -726,6 +726,22 @@ mod_strip_cmd = true
endif # INSTALL_MOD_STRIP
export mod_strip_cmd
+# Select initial ramdisk compression format, default is gzip(1).
+# This shall be used by the dracut(8) tool while creating an initramfs image.
+#
+INITRD_COMPRESS=gzip
+ifeq ($(CONFIG_RD_BZIP2), y)
+ INITRD_COMPRESS=bzip2
+else ifeq ($(CONFIG_RD_LZMA), y)
+ INITRD_COMPRESS=lzma
+else ifeq ($(CONFIG_RD_XZ), y)
+ INITRD_COMPRESS=xz
+else ifeq ($(CONFIG_RD_LZO), y)
+ INITRD_COMPRESS=lzo
+else ifeq ($(CONFIG_RD_LZ4), y)
+ INITRD_COMPRESS=lz4
+endif
+export INITRD_COMPRESS
ifdef CONFIG_MODULE_SIG_ALL
MODSECKEY = ./signing_key.priv
diff -puN init/do_mounts_rd.c~makefile-export-initial-ramdisk-compression-config-option init/do_mounts_rd.c
--- a/init/do_mounts_rd.c~makefile-export-initial-ramdisk-compression-config-option
+++ a/init/do_mounts_rd.c
@@ -57,6 +57,11 @@ static int __init crd_load(int in_fd, in
* cramfs
* squashfs
* gzip
+ * bzip2
+ * lzma
+ * xz
+ * lzo
+ * lz4
*/
static int __init
identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
_
Patches currently in -mm which might be from ppandit@xxxxxxxxxx are
makefile-export-initial-ramdisk-compression-config-option.patch
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