/*
 * 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;
}
elected'>nds-private-remove</option>
<option value='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/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/drivers/usb/serial/keyspan.h?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/serial/keyspan.h?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/keyspan.h?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/keyspan.h?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/serial/keyspan.h'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='5226b7919641f285bf0f8db84deeb3920b160ec7'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/serial?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>serial</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/serial/keyspan.h?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7'>keyspan.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/serial/keyspan.h?h=nds-private-remove&amp;id=5226b7919641f285bf0f8db84deeb3920b160ec7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>