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kbuild: Use CRC32 and a 1MiB dictionary for XZ compressed modules 

Kmod is now (since kmod commit 09c9f8c5df04 ("libkmod: Use kernel
decompression when available")) using the kernel decompressor, when
loading compressed modules.

However, the kernel XZ decompressor is XZ Embedded, which doesn't
handle CRC64 and dictionaries larger than 1MiB.

Use CRC32 and 1MiB dictionary when XZ compressing and installing
kernel modules.

Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1050582
Signed-off-by: Martin Nybo Andersen <tweek@tweek.dk>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Martin Nybo Andersen 2023-09-15 12:15:39 +02:00 committed by Masahiro Yamada
parent 6465e260f4
commit fbf5892df2
1 changed files with 1 additions and 1 deletions
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2
scripts/Makefile.modinst
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@ -144,7 +144,7 @@ endif
quiet_cmd_gzip = GZIP $@
cmd_gzip = $(KGZIP) -n -f $<
quiet_cmd_xz = XZ $@
cmd_xz = $(XZ) --lzma2=dict=2MiB -f $<
cmd_xz = $(XZ) --check=crc32 --lzma2=dict=1MiB -f $<
quiet_cmd_zstd = ZSTD $@
cmd_zstd = $(ZSTD) -T0 --rm -f -q $<