crypto: add crypto_[un]register_shashes for [un]registering multiple shash entries at once

Add crypto_[un]register_shashes() to allow simplifying init/exit code of shash
crypto modules that register multiple algorithms.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 36 insertions, 0 deletions

diff --git a/crypto/shash.c b/crypto/shash.c
index 32067f47e6c7..f426330f1017 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -629,6 +629,42 @@ int crypto_unregister_shash(struct shash_alg *alg)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_shash);
 
+int crypto_register_shashes(struct shash_alg *algs, int count)
+{
+        int i, ret;
+
+        for (i = 0; i < count; i++) {
+                ret = crypto_register_shash(&algs[i]);
+                if (ret)
+                        goto err;
+        }
+
+        return 0;
+
+err:
+        for (--i; i >= 0; --i)
+                crypto_unregister_shash(&algs[i]);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(crypto_register_shashes);
+
+int crypto_unregister_shashes(struct shash_alg *algs, int count)
+{
+        int i, ret;
+
+        for (i = count - 1; i >= 0; --i) {
+                ret = crypto_unregister_shash(&algs[i]);
+                if (ret)
+                        pr_err("Failed to unregister %s %s: %d\n",
+                               algs[i].base.cra_driver_name,
+                               algs[i].base.cra_name, ret);
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_shashes);
+
 int shash_register_instance(struct crypto_template *tmpl,
                             struct shash_instance *inst)
 {