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authorP J P <ppandit@redhat.com>2013-11-12 15:10:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:26 +0900
commit9ba4bcb645898d562498ea66a0df958ef0e7a68c (patch)
tree20befe80438adaec351eff0eb1f225d0b3df0963 /scripts/gen_initramfs_list.sh
parentba24762bd53faaf39cc8b991175636954b7ef4be (diff)
downloadleg-kernel-9ba4bcb645898d562498ea66a0df958ef0e7a68c.tar.gz
initramfs: read CONFIG_RD_ variables for initramfs compression
When expert configuration option(CONFIG_EXPERT) is enabled, menuconfig offers a choice of compression algorithm to compress initial ramfs image; This choice is stored into CONFIG_RD_* variables. But usr/Makefile uses earlier INITRAMFS_COMPRESSION_* macros to build initial ramfs file. Since none of them is defined, resulting 'initramfs_data.cpio' file remains un-compressed. This patch updates the Makefile to use CONFIG_RD_* variables and adds support for LZ4 compression algorithm. Also updates the 'gen_initramfs_list.sh' script to check whether a selected compression command is accessible or not. And fall-back to default gzip(1) compression when it is not. Signed-off-by: P J P <prasad@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/gen_initramfs_list.sh')
-rw-r--r--scripts/gen_initramfs_list.sh24
1 files changed, 18 insertions, 6 deletions
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index b482f162a18a..ef474098d9f1 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -240,12 +240,24 @@ case "$arg" in
output_file="$1"
cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
output=${cpio_list}
- echo "$output_file" | grep -q "\.gz$" && compr="gzip -n -9 -f"
- echo "$output_file" | grep -q "\.bz2$" && compr="bzip2 -9 -f"
- echo "$output_file" | grep -q "\.lzma$" && compr="lzma -9 -f"
- echo "$output_file" | grep -q "\.xz$" && \
- compr="xz --check=crc32 --lzma2=dict=1MiB"
- echo "$output_file" | grep -q "\.lzo$" && compr="lzop -9 -f"
+ echo "$output_file" | grep -q "\.gz$" \
+ && [ -x "`which gzip 2> /dev/null`" ] \
+ && compr="gzip -n -9 -f"
+ echo "$output_file" | grep -q "\.bz2$" \
+ && [ -x "`which bzip2 2> /dev/null`" ] \
+ && compr="bzip2 -9 -f"
+ echo "$output_file" | grep -q "\.lzma$" \
+ && [ -x "`which lzma 2> /dev/null`" ] \
+ && compr="lzma -9 -f"
+ echo "$output_file" | grep -q "\.xz$" \
+ && [ -x "`which xz 2> /dev/null`" ] \
+ && compr="xz --check=crc32 --lzma2=dict=1MiB"
+ echo "$output_file" | grep -q "\.lzo$" \
+ && [ -x "`which lzop 2> /dev/null`" ] \
+ && compr="lzop -9 -f"
+ echo "$output_file" | grep -q "\.lz4$" \
+ && [ -x "`which lz4 2> /dev/null`" ] \
+ && compr="lz4 -9 -f"
echo "$output_file" | grep -q "\.cpio$" && compr="cat"
shift
;;