1 files changed, 0 insertions, 120 deletions
diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c
deleted file mode 100644
index 8cc01a603416..000000000000
--- a/lib/crc-t10dif.c
+++ /dev/null
@@ -1,120 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * T10 Data Integrity Field CRC16 calculation
- *
- * Copyright (c) 2007 Oracle Corporation.  All rights reserved.
- * Written by Martin K. Petersen <martin.petersen@oracle.com>
- */
-
-#include <linux/types.h>
-#include <linux/module.h>
-#include <linux/crc-t10dif.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <crypto/hash.h>
-#include <crypto/algapi.h>
-#include <linux/static_key.h>
-#include <linux/notifier.h>
-
-static struct crypto_shash __rcu *crct10dif_tfm;
-static struct static_key crct10dif_fallback __read_mostly;
-static DEFINE_MUTEX(crc_t10dif_mutex);
-
-static int crc_t10dif_rehash(struct notifier_block *self, unsigned long val, void *data)
-{
-	struct crypto_alg *alg = data;
-	struct crypto_shash *new, *old;
-
-	if (val != CRYPTO_MSG_ALG_LOADED ||
-	    static_key_false(&crct10dif_fallback) ||
-	    strncmp(alg->cra_name, CRC_T10DIF_STRING, strlen(CRC_T10DIF_STRING)))
-		return 0;
-
-	mutex_lock(&crc_t10dif_mutex);
-	old = rcu_dereference_protected(crct10dif_tfm,
-					lockdep_is_held(&crc_t10dif_mutex));
-	if (!old) {
-		mutex_unlock(&crc_t10dif_mutex);
-		return 0;
-	}
-	new = crypto_alloc_shash("crct10dif", 0, 0);
-	if (IS_ERR(new)) {
-		mutex_unlock(&crc_t10dif_mutex);
-		return 0;
-	}
-	rcu_assign_pointer(crct10dif_tfm, new);
-	mutex_unlock(&crc_t10dif_mutex);
-
-	synchronize_rcu();
-	crypto_free_shash(old);
-	return 0;
-}
-
-static struct notifier_block crc_t10dif_nb = {
-	.notifier_call = crc_t10dif_rehash,
-};
-
-__u16 crc_t10dif_update(__u16 crc, const unsigned char *buffer, size_t len)
-{
-	struct {
-		struct shash_desc shash;
-		char ctx[2];
-	} desc;
-	int err;
-
-	if (static_key_false(&crct10dif_fallback))
-		return crc_t10dif_generic(crc, buffer, len);
-
-	rcu_read_lock();
-	desc.shash.tfm = rcu_dereference(crct10dif_tfm);
-	*(__u16 *)desc.ctx = crc;
-
-	err = crypto_shash_update(&desc.shash, buffer, len);
-	rcu_read_unlock();
-
-	BUG_ON(err);
-
-	return *(__u16 *)desc.ctx;
-}
-EXPORT_SYMBOL(crc_t10dif_update);
-
-__u16 crc_t10dif(const unsigned char *buffer, size_t len)
-{
-	return crc_t10dif_update(0, buffer, len);
-}
-EXPORT_SYMBOL(crc_t10dif);
-
-static int __init crc_t10dif_mod_init(void)
-{
-	crypto_register_notifier(&crc_t10dif_nb);
-	crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0);
-	if (IS_ERR(crct10dif_tfm)) {
-		static_key_slow_inc(&crct10dif_fallback);
-		crct10dif_tfm = NULL;
-	}
-	return 0;
-}
-
-static void __exit crc_t10dif_mod_fini(void)
-{
-	crypto_unregister_notifier(&crc_t10dif_nb);
-	crypto_free_shash(crct10dif_tfm);
-}
-
-module_init(crc_t10dif_mod_init);
-module_exit(crc_t10dif_mod_fini);
-
-static int crc_t10dif_transform_show(char *buffer, const struct kernel_param *kp)
-{
-	if (static_key_false(&crct10dif_fallback))
-		return sprintf(buffer, "fallback\n");
-
-	return sprintf(buffer, "%s\n",
-		crypto_tfm_alg_driver_name(crypto_shash_tfm(crct10dif_tfm)));
-}
-
-module_param_call(transform, NULL, crc_t10dif_transform_show, NULL, 0644);
-
-MODULE_DESCRIPTION("T10 DIF CRC calculation");
-MODULE_LICENSE("GPL");
-MODULE_SOFTDEP("pre: crct10dif");