diff mbox

crypto: hash - Add AHASH_REQUEST_ON_STACK

Message ID 20150820090240.GA27976@gondor.apana.org.au (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show

Commit Message

Herbert Xu Aug. 20, 2015, 9:02 a.m. UTC
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 mbox

Patch

diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index 57c8a6e..8e920b4 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