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authorDaniel M. Weeks <dan@danweeks.net>2014-03-03 15:38:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-03-04 07:55:48 -0800
commit5ec384d45b42fc9274df835be435e964f885b6ed (patch)
treebbde4963dd498d46c4c1017d908ca55ed91cf806 /scripts/gen_initramfs_list.sh
parent9050d7eba40b3d79551668f54e68fd6f51945ef3 (diff)
downloadleg-kernel-5ec384d45b42fc9274df835be435e964f885b6ed.tar.gz
scripts/gen_initramfs_list.sh: fix flags for initramfs LZ4 compression
LZ4 as implemented in the kernel differs from the default method now used by the reference implementation of LZ4. Until the in-kernel method is updated to support the new default, passing the legacy flag (-l) to the compressor is necessary. Without this flag the kernel-generated, LZ4-compressed initramfs is junk. Kyungsik said: : It seems that lz4 supports legacy format with the same option as lz4c : does. Just looking at the first few bytes of lz4 compressed image, we can : see whether it is new format or not. : : It shows new format magic number without this patch. New format magic : number is 0x184d2204. : : $ hexdump -C ./initramfs_data.cpio.lz4 |more : 00000000 04 22 4d 18 64 70 b9 69 (Little Endian) : ... : : Currently kernel supports legacy format only. Signed-off-by: Daniel M. Weeks <dan@danweeks.net> Cc: Michal Marek <mmarek@suse.cz> Acked-by: Kyungsik Lee <kyungsik.lee@lge.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.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index ef474098d9f1..17fa901418ae 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -257,7 +257,7 @@ case "$arg" in
&& compr="lzop -9 -f"
echo "$output_file" | grep -q "\.lz4$" \
&& [ -x "`which lz4 2> /dev/null`" ] \
- && compr="lz4 -9 -f"
+ && compr="lz4 -l -9 -f"
echo "$output_file" | grep -q "\.cpio$" && compr="cat"
shift
;;