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| author | Miguel <miguel.filipe@gmail.com> | 2008-04-11 19:45:51 (GMT) |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 15:04:01 (GMT) |
| commit | a5eb62e345fc1818d0d8b6181463200a9e8dfe39 (patch) | |
| tree | 2e67b0628c8312d941f52edadc6c49bd8ac4c914 /fs/btrfs/extent_io.c | |
| parent | 587f77043a1c86e2a7900ff2ce86bef3c1f4e075 (diff) | |
| download | linux-fsl-qoriq-a5eb62e345fc1818d0d8b6181463200a9e8dfe39.tar.xz | |
Btrfs: Endianess bug fix for v0.13 with kernels
Fix for a endianess BUG when using btrfs v0.13 with kernels older than 2.6.23
Problem:
Has of v0.13, btrfs-progs is using crc32c.c equivalent to the one found on
linux-2.6.23/lib/libcrc32c.c Since crc32c_le() changed in linux-2.6.23, when
running btrfs v0.13 with older kernels we have a missmatch between the versions
of crc32c_le() from btrfs-progs and libcrc32c in the kernel. This missmatch
causes a bug when using btrfs on big endian machines.
Solution:
btrfs_crc32c() macro that when compiling for kernels older than 2.6.23, does
endianess conversion to parameters and return value of crc32c().
This endianess conversion nullifies the differences in implementation
of crc32c_le().
If kernel 2.6.23 or better, it calls crc32c().
Signed-off-by: Miguel Sousa Filipe <miguel.filipe@gmail.com>
---
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_io.c')
0 files changed, 0 insertions, 0 deletions