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68411521cc
This patch reinstates commits 67822649d7305caf3dd50ed46c27b99c94eff996 39761214eefc6b070f29402aa1165f24d789b3f7 0b95a7f85718adcbba36407ef88bba0a7379ed03 31d939625a9a20b1badd2d4e6bf6fd39fa523405 2d31e518a42828df7877bca23a958627d60408bc Now that module softdeps are in the kernel we can use that to resolve the boot issue which cause the revert. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
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* T10 Data Integrity Field CRC16 calculation
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*
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* Copyright (c) 2007 Oracle Corporation. All rights reserved.
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* Written by Martin K. Petersen <martin.petersen@oracle.com>
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*
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* This source code is licensed under the GNU General Public License,
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* Version 2. See the file COPYING for more details.
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/crc-t10dif.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <crypto/hash.h>
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static struct crypto_shash *crct10dif_tfm;
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__u16 crc_t10dif(const unsigned char *buffer, size_t len)
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{
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struct {
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struct shash_desc shash;
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char ctx[2];
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} desc;
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int err;
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desc.shash.tfm = crct10dif_tfm;
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desc.shash.flags = 0;
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*(__u16 *)desc.ctx = 0;
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err = crypto_shash_update(&desc.shash, buffer, len);
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BUG_ON(err);
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return *(__u16 *)desc.ctx;
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}
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EXPORT_SYMBOL(crc_t10dif);
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static int __init crc_t10dif_mod_init(void)
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{
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crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0);
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return PTR_RET(crct10dif_tfm);
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}
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static void __exit crc_t10dif_mod_fini(void)
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{
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crypto_free_shash(crct10dif_tfm);
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}
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module_init(crc_t10dif_mod_init);
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module_exit(crc_t10dif_mod_fini);
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MODULE_DESCRIPTION("T10 DIF CRC calculation");
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MODULE_LICENSE("GPL");
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MODULE_SOFTDEP("pre: crct10dif");
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