/* * CRC32 using the polynomial from IEEE-802.3 * * Authors: Lasse Collin * Igor Pavlov * * This file has been put into the public domain. * You can do whatever you want with this file. */ /* * This is not the fastest implementation, but it is pretty compact. * The fastest versions of xz_crc32() on modern CPUs without hardware * accelerated CRC instruction are 3-5 times as fast as this version, * but they are bigger and use more memory for the lookup table. */ #include "xz_private.h" /* * STATIC_RW_DATA is used in the pre-boot environment on some architectures. * See for details. */ #ifndef STATIC_RW_DATA # define STATIC_RW_DATA static #endif STATIC_RW_DATA uint32_t xz_crc32_table[256]; XZ_EXTERN void xz_crc32_init(void) { const uint32_t poly = 0xEDB88320; uint32_t i; uint32_t j; uint32_t r; for (i = 0; i < 256; ++i) { r = i; for (j = 0; j < 8; ++j) r = (r >> 1) ^ (poly & ~((r & 1) - 1)); xz_crc32_table[i] = r; } return; } XZ_EXTERN uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc) { crc = ~crc; while (size != 0) { crc = xz_crc32_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8); --size; } return ~crc; } net-next plumbingsTobias Klauser
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authorSalvatore Benedetto <salvatore.benedetto@intel.com>2017-01-13 11:54:08 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2017-01-23 22:41:32 +0800
commitd6040764adcb5cb6de1489422411d701c158bb69 (patch)
treeec8f34788bcdeaa9dc8f69c58af4c005d1e49021 /drivers/usb/storage/unusual_uas.h
parent07825f0acd85dd8b7481d5ef0eb024b05364d892 (diff)
crypto: api - Clear CRYPTO_ALG_DEAD bit before registering an alg
Make sure CRYPTO_ALG_DEAD bit is cleared before proceeding with the algorithm registration. This fixes qat-dh registration when driver is restarted Cc: <stable@vger.kernel.org> Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/usb/storage/unusual_uas.h')