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author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-10 13:29:36 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-10 13:30:08 -0700 |
commit | 9b6a51746ffe8d619f1097675d2dc5e303470024 (patch) | |
tree | 52668d7adc6f5c1d347d65072878cf1f82670364 /include/linux/crc-itu-t.h | |
parent | fc0b60f1dc311a2f7443ce46305edd287b2d8947 (diff) | |
parent | d79406dd140a3e6eed6f26b17f0c6620fe30b50c (diff) | |
download | lwn-9b6a51746ffe8d619f1097675d2dc5e303470024.tar.gz lwn-9b6a51746ffe8d619f1097675d2dc5e303470024.zip |
Merge branch 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (138 commits)
firewire: Convert OHCI driver to use standard goto unwinding for error handling.
firewire: Always use parens with sizeof.
firewire: Drop single buffer request support.
firewire: Add a comment to describe why we split the sg list.
firewire: Return SCSI_MLQUEUE_HOST_BUSY for out of memory cases in queuecommand.
firewire: Handle the last few DMA mapping error cases.
firewire: Allocate scsi_host up front and allocate the sbp2_device as hostdata.
firewire: Provide module aliase for backwards compatibility.
firewire: Add to fw-core-y instead of assigning fw-core-objs in Makefile.
firewire: Break out shared IEEE1394 constant to separate header file.
firewire: Use linux/*.h instead of asm/*.h header files.
firewire: Uppercase most macro names.
firewire: Coding style cleanup: no spaces after function names.
firewire: Convert card_rwsem to a regular mutex.
firewire: Clean up comment style.
firewire: Use lib/ implementation of CRC ITU-T.
CRC ITU-T V.41
firewire: Rename fw-device-cdev.c to fw-cdev.c and move header to include/linux.
firewire: Future proof the iso ioctls by adding a handle for the iso context.
firewire: Add read/write and size annotations to IOC numbers.
...
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/crc-itu-t.h')
-rw-r--r-- | include/linux/crc-itu-t.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/crc-itu-t.h b/include/linux/crc-itu-t.h new file mode 100644 index 000000000000..84920f3cc83e --- /dev/null +++ b/include/linux/crc-itu-t.h @@ -0,0 +1,28 @@ +/* + * crc-itu-t.h - CRC ITU-T V.41 routine + * + * Implements the standard CRC ITU-T V.41: + * Width 16 + * Poly 0x0x1021 (x^16 + x^12 + x^15 + 1) + * Init 0 + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#ifndef CRC_ITU_T_H +#define CRC_ITU_T_H + +#include <linux/types.h> + +extern u16 const crc_itu_t_table[256]; + +extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len); + +static inline u16 crc_itu_t_byte(u16 crc, const u8 data) +{ + return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff]; +} + +#endif /* CRC_ITU_T_H */ + |