Merge tag 'mac80211-next-for-john-2014-11-04' of git://git.kernel.org/pub/scm/linux...

[cascardo/linux.git] / include / crypto / hash.h

diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index a391955..74b13ec 100644 (file)
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -58,6 +58,11 @@ struct shash_desc {
        void *__ctx[] CRYPTO_MINALIGN_ATTR;
 };
 
+#define SHASH_DESC_ON_STACK(shash, ctx)                                  \
+       char __##shash##_desc[sizeof(struct shash_desc) +         \
+               crypto_shash_descsize(ctx)] CRYPTO_MINALIGN_ATTR; \
+       struct shash_desc *shash = (struct shash_desc *)__##shash##_desc
+
 struct shash_alg {
        int (*init)(struct shash_desc *desc);
        int (*update)(struct shash_desc *desc, const u8 *data,