Subject: [merged] scripts-gen_initramfs_listsh-fix-flags-for-initramfs-lz4-compression.patch removed from -mm tree
To: dan@xxxxxxxxxxxx,kyungsik.lee@xxxxxxx,mmarek@xxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 06 Mar 2014 12:37:36 -0800
The patch titled
Subject: scripts/gen_initramfs_list.sh: fix flags for initramfs LZ4 compression
has been removed from the -mm tree. Its filename was
scripts-gen_initramfs_listsh-fix-flags-for-initramfs-lz4-compression.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: "Daniel M. Weeks" <dan@xxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Acked-by: Kyungsik Lee <kyungsik.lee@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/gen_initramfs_list.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN scripts/gen_initramfs_list.sh~scripts-gen_initramfs_listsh-fix-flags-for-initramfs-lz4-compression scripts/gen_initramfs_list.sh
--- a/scripts/gen_initramfs_list.sh~scripts-gen_initramfs_listsh-fix-flags-for-initramfs-lz4-compression
+++ a/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
;;
_
Patches currently in -mm which might be from dan@xxxxxxxxxxxx are
origin.patch
initramfs-debug-detected-compression-method.patch
initramfs-debug-detected-compression-method-fix.patch
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