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| author |   Daniel M. Weeks <dan@danweeks.net> | 2014-03-03 15:38:28 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-03-04 07:55:48 -0800 |
| commit | 5ec384d45b42fc9274df835be435e964f885b6ed (patch) | |
| tree | bbde4963dd498d46c4c1017d908ca55ed91cf806 /scripts | |
| parent | mm: include VM_MIXEDMAP flag in the VM_SPECIAL list to avoid m(un)locking (diff) | |
| download | linux-dev-5ec384d45b42fc9274df835be435e964f885b6ed.tar.xz linux-dev-5ec384d45b42fc9274df835be435e964f885b6ed.zip | |
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')
| -rw-r--r-- | scripts/gen_initramfs_list.sh | 2 |
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 ;; |