From d4421c54c45f643731c92daa8e268ce74dcdf5a2 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 20 Aug 2015 17:02:40 +0800
Subject: [PATCH] crypto: hash - Add AHASH_REQUEST_ON_STACK
This patch adds the helper AHASH_REQUEST_ON_STACK for those users
of ahash that are synchronous only.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
include/crypto/hash.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index 57c8a6ee33c27..8e920b44c0ac4 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -63,6 +63,11 @@ struct ahash_request {
void *__ctx[] CRYPTO_MINALIGN_ATTR;
};
+#define AHASH_REQUEST_ON_STACK(name, ahash) \
+ char __##name##_desc[sizeof(struct ahash_request) + \
+ crypto_ahash_reqsize(ahash)] CRYPTO_MINALIGN_ATTR; \
+ struct ahash_request *name = (void *)__##name##_desc
+
/**
* struct ahash_alg - asynchronous message digest definition
* @init: Initialize the transformation context. Intended only to initialize the
--
2.30.2