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de39ec11b8
Endianness detection in LZ4 is broken in user-space builds. This bug corrupts compressed data and manifests itself in several ztest failures. When LZ4 was originally ported to Illumos ZFS, the proper checks for Linux were stripped out. The Linux port then inherited the remaining detection code that works on Illumos but not on Linux. The current LZ4 endianness check misuses the condition defined(__BIG_ENDIAN) to indicate a big-endian system. On Linux __BIG_ENDIAN is defined uncondtionally in the user-space header /usr/include/endian.h, regardless of the endianness of the system. The kernel does not use this header, so only user-space builds are affected. While we could fix this by restoring the upstream LZ4 endianness detection code, reliable checks already exist in libspl/include/sys/isa_defs.h. This change uses the libspl results to replace the word-size and endianness checks in LZ4, simplifying the code and reducing duplication. Signed-off-by: Ned Bass <bass6@llnl.gov> Signed-off-by: Chunwei Chen <tuxoko@gmail.com> Signed-off-by: DHE <git@dehacked.net> Signed-off-by: Prakash Surya <surya1@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Fixes #1963 Fixes #1964 Fixes #1965 |
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