[PATCH] Fix flags for initramfs LZ4 compression

From: "Daniel M. Weeks" <dan@danweeks.net>
To: Michal Marek <mmarek@suse.cz>
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] Fix flags for initramfs LZ4 compression
Date: Sat, 15 Feb 2014 18:14:57 -0500	[thread overview]
Message-ID: <20140215231447.GA30803@dev.danweeks.net> (raw)

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.

Signed-off-by: Daniel M. Weeks <dan@danweeks.net>
---
 scripts/gen_initramfs_list.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index ef47409..17fa901 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
 		;;
-- 
Daniel M. Weeks
