linux-kernel - [PATCH 1/5] crypto: api - add a helper to (un)register a array of templates

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Date:   Wed, 16 Jan 2019 10:50:30 +0800
From:   Xiongfeng Wang <wangxiongfeng2@...wei.com>
To:     <herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <wangxiongfeng2@...wei.com>, <broonie@...nel.org>,
        <ard.biesheuvel@...aro.org>, <jonathan.cameron@...wei.com>
Subject: [PATCH 1/5] crypto: api - add a helper to (un)register a array of templates

This patch add a helper to (un)register a array of templates. The
following patches will use this helper to simplify the code.

Signed-off-by: Xiongfeng Wang <xiongfeng.wang@...aro.org>
---
 crypto/algapi.c         | 27 +++++++++++++++++++++++++++
 include/crypto/algapi.h |  2 ++
 2 files changed, 29 insertions(+)

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 8b65ada..59a6599 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -494,6 +494,24 @@ int crypto_register_template(struct crypto_template *tmpl)
 }
 EXPORT_SYMBOL_GPL(crypto_register_template);
 
+int crypto_register_templates(struct crypto_template *tmpl, int num)
+{
+	int i, err;
+
+	for (i = 0; i < num; i++) {
+		err = crypto_register_template(&tmpl[i]);
+		if (err)
+			goto out;
+	}
+	return 0;
+
+out:
+	for (i -= 1; i >= 0; i--)
+		crypto_unregister_template(&tmpl[i]);
+	return err;
+}
+EXPORT_SYMBOL_GPL(crypto_register_templates);
+
 void crypto_unregister_template(struct crypto_template *tmpl)
 {
 	struct crypto_instance *inst;
@@ -523,6 +541,15 @@ void crypto_unregister_template(struct crypto_template *tmpl)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_template);
 
+void crypto_unregister_templates(struct crypto_template *tmpl, int num)
+{
+	int i;
+
+	for (i = num - 1; i >= 0; i--)
+		crypto_unregister_template(&tmpl[i]);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_templates);
+
 static struct crypto_template *__crypto_lookup_template(const char *name)
 {
 	struct crypto_template *q, *tmpl = NULL;
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 4a5ad10..e879a20 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -143,7 +143,9 @@ struct ablkcipher_walk {
 void crypto_mod_put(struct crypto_alg *alg);
 
 int crypto_register_template(struct crypto_template *tmpl);
+int crypto_register_templates(struct crypto_template *tmpl, int num);
 void crypto_unregister_template(struct crypto_template *tmpl);
+void crypto_unregister_templates(struct crypto_template *tmpl, int num);
 struct crypto_template *crypto_lookup_template(const char *name);
 
 int crypto_register_instance(struct crypto_template *tmpl,
-- 
1.7.12.4