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| author | Darrick J. Wong <djwong@us.ibm.com> | 2012-03-23 23:02:25 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-24 00:58:38 +0100 |
| commit | 46c5801eaf86e83cb3a4142ad35188db5011fff0 (patch) | |
| tree | 2b8a8f7709aa7dadafdf13f823488cf51e2e2fed /lib/crc32defs.h | |
| parent | crc32: add note about this patchset to crc32.c (diff) | |
| download | linux-46c5801eaf86e83cb3a4142ad35188db5011fff0.tar.xz linux-46c5801eaf86e83cb3a4142ad35188db5011fff0.zip | |
crc32: bolt on crc32c
Reuse the existing crc32 code to stamp out a crc32c implementation.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Bob Pearson <rpearson@systemfabricworks.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/crc32defs.h')
| -rw-r--r-- | lib/crc32defs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/crc32defs.h b/lib/crc32defs.h index 818159288489..6fd191732fec 100644 --- a/lib/crc32defs.h +++ b/lib/crc32defs.h @@ -7,6 +7,13 @@ #define CRCPOLY_BE 0x04c11db7 /* + * This is the CRC32c polynomial, as outlined by Castagnoli. + * x^32+x^28+x^27+x^26+x^25+x^23+x^22+x^20+x^19+x^18+x^14+x^13+x^11+x^10+x^9+ + * x^8+x^6+x^0 + */ +#define CRC32C_POLY_LE 0x82F63B78 + +/* * How many bits at a time to use. Valid values are 1, 2, 4, 8, 32 and 64. * For less performance-sensitive, use 4 or 8 to save table size. * For larger systems choose same as CPU architecture as default. |