/* * 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; } ket-loop-back'>packet-loop-back net-next plumbingsTobias Klauser
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authorAlexander Stein <alexander.stein@systec-electronic.com>2017-01-30 12:35:28 +0100
committerLinus Walleij <linus.walleij@linaro.org>2017-01-30 15:53:57 +0100
commitcdca06e4e85974d8a3503ab15709dbbaf90d3dd1 (patch)
tree268b0c01070a957006db97c88dccb5fb061440ff /sound/atmel
parent1b89970d81bbd52720fc64a3fe9572ee33588363 (diff)
pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler
According to VLI64 Intel Atom E3800 Specification Update (#329901) concurrent read accesses may result in returning 0xffffffff and write accesses may be dropped silently. To workaround all accesses must be protected by locks. Cc: stable@vger.kernel.org Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'sound/atmel')