/*
 * Copyright (C) 2014 Filipe David Borba Manana <fdmanana@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include <crypto/hash.h>
#include <linux/err.h>
#include "hash.h"

static struct crypto_shash *tfm;

int __init btrfs_hash_init(void)
{
	tfm = crypto_alloc_shash("crc32c", 0, 0);

	return PTR_ERR_OR_ZERO(tfm);
}

const char* btrfs_crc32c_impl(void)
{
	return crypto_tfm_alg_driver_name(crypto_shash_tfm(tfm));
}

void btrfs_hash_exit(void)
{
	crypto_free_shash(tfm);
}

u32 btrfs_crc32c(u32 crc, const void *address, unsigned int length)
{
	SHASH_DESC_ON_STACK(shash, tfm);
	u32 *ctx = (u32 *)shash_desc_ctx(shash);
	int err;

	shash->tfm = tfm;
	shash->flags = 0;
	*ctx = crc;

	err = crypto_shash_update(shash, address, length);
	BUG_ON(err);

	return *ctx;
}
='packet-loop-back'>packet-loop-back</option>
<option value='packet-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/isp1760'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/isp1760?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/isp1760?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>commit</a><a class='active' href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/isp1760?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/isp1760'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/drivers?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/isp1760?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>isp1760</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='e2160156bf2a7d5018e99a9993fbcdda0abac09b'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>Diffstat</a> (limited to 'drivers/usb/isp1760')</div><table summary='diffstat' class='diffstat'>