| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.10 096/167] crypto: api - Add crypto_requires_off helper | Date | Fri, 10 Mar 2017 10:08:59 +0100 |
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4.10-stable review patch. If anyone has any objections, please let me know.
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From: Herbert Xu <herbert@gondor.apana.org.au>
commit 016df0abc56ec06d0c63c5318ef53e40738dea8b upstream.
This patch adds crypto_requires_off which is an extension of crypto_requires_sync for similar bits such as NEED_FALLBACK.
Suggested-by: Marcelo Cerri <marcelo.cerri@canonical.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- include/crypto/algapi.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
--- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -344,13 +344,18 @@ static inline struct crypto_alg *crypto_ 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);
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