ia64/linux-2.6.18-xen.hg

annotate lib/crc32defs.h @ 871:9cbcc9008446

xen/x86: don't initialize cpu_data[]'s apicid field on generic code

Afaict, this is not only redundant with the intialization done in
drivers/xen/core/smpboot.c, but actually results - at least for
secondary CPUs - in the Xen-specific value written to be later
overwritten with whatever the generic code determines (with no
guarantee that the two values are identical).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu May 14 10:09:15 2009 +0100 (2009-05-14)
parents 831230e53067
children
rev   line source
ian@0 1 /*
ian@0 2 * There are multiple 16-bit CRC polynomials in common use, but this is
ian@0 3 * *the* standard CRC-32 polynomial, first popularized by Ethernet.
ian@0 4 * x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0
ian@0 5 */
ian@0 6 #define CRCPOLY_LE 0xedb88320
ian@0 7 #define CRCPOLY_BE 0x04c11db7
ian@0 8
ian@0 9 /* How many bits at a time to use. Requires a table of 4<<CRC_xx_BITS bytes. */
ian@0 10 /* For less performance-sensitive, use 4 */
ian@0 11 #ifndef CRC_LE_BITS
ian@0 12 # define CRC_LE_BITS 8
ian@0 13 #endif
ian@0 14 #ifndef CRC_BE_BITS
ian@0 15 # define CRC_BE_BITS 8
ian@0 16 #endif
ian@0 17
ian@0 18 /*
ian@0 19 * Little-endian CRC computation. Used with serial bit streams sent
ian@0 20 * lsbit-first. Be sure to use cpu_to_le32() to append the computed CRC.
ian@0 21 */
ian@0 22 #if CRC_LE_BITS > 8 || CRC_LE_BITS < 1 || CRC_LE_BITS & CRC_LE_BITS-1
ian@0 23 # error CRC_LE_BITS must be a power of 2 between 1 and 8
ian@0 24 #endif
ian@0 25
ian@0 26 /*
ian@0 27 * Big-endian CRC computation. Used with serial bit streams sent
ian@0 28 * msbit-first. Be sure to use cpu_to_be32() to append the computed CRC.
ian@0 29 */
ian@0 30 #if CRC_BE_BITS > 8 || CRC_BE_BITS < 1 || CRC_BE_BITS & CRC_BE_BITS-1
ian@0 31 # error CRC_BE_BITS must be a power of 2 between 1 and 8
ian@0 32 #endif