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authorHerbert Xu <herbert@gondor.apana.org.au>2017-02-26 12:22:35 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2017-02-27 18:09:39 +0800
commit016df0abc56ec06d0c63c5318ef53e40738dea8b (patch)
tree2a9cfc6dcf8a20dc989e66b5d81d31834386f87a /include/crypto
parentc884b36816c131906038cdac4773f6c84a5bf3ee (diff)
downloadlinux-016df0abc56ec06d0c63c5318ef53e40738dea8b.tar.bz2
crypto: api - Add crypto_requires_off helper
This patch adds crypto_requires_off which is an extension of crypto_requires_sync for similar bits such as NEED_FALLBACK. Cc: stable@vger.kernel.org #4.10 Suggested-by: Marcelo Cerri <marcelo.cerri@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
-rw-r--r--include/crypto/algapi.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index ebe4ded0c55d..436c4c2683c7 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -360,13 +360,18 @@ static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
return crypto_attr_alg(tb[1], type, mask);
}
+static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
+{
+ return (type ^ off) & mask & off;
+}
+
/*
* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
* Otherwise returns zero.
*/
static inline int crypto_requires_sync(u32 type, u32 mask)
{
- return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
+ return crypto_requires_off(type, mask, CRYPTO_ALG_ASYNC);
}
noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);