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>
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@ -360,13 +360,18 @@ static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
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return crypto_attr_alg(tb[1], type, mask);
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return crypto_attr_alg(tb[1], type, mask);
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}
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}
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static inline int crypto_requires_off(u32 type, u32 mask, u32 off)
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{
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return (type ^ off) & mask & off;
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}
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/*
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/*
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* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
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* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
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* Otherwise returns zero.
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* Otherwise returns zero.
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*/
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*/
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static inline int crypto_requires_sync(u32 type, u32 mask)
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static inline int crypto_requires_sync(u32 type, u32 mask)
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{
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{
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return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
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return crypto_requires_off(type, mask, CRYPTO_ALG_ASYNC);
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}
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}
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noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
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noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);
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