sha256_finup...is_optimized(9)

💅 sha256_finup_2x_is_optimized — a.k.a. the Kernel API Manual page you didn't know you needed 🎀

okay so bestie, welcome to section 9 of the funny little kernel manual, where we answer the question: is this thing actually doing the fast thing, or is it quietly doing the slow thing? 👀

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✨ NAME ✨

sha256_finup_2x_is_optimized — checks whether sha256_finup_2x() is running a real interleaved implementation, as opposed to a sequential fallback. no cap, that's the whole gig 🫶

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🌸 SYNOPSIS 🌸

bool sha256_finup_2x_is_optimized (void );

it takes nothing, it returns a bool, it's giving lowkey iconic minimalism 💅

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🦋 ARGUMENTS 🦋

• void — literally no arguments. none. zero. the void is voiding 🕳️✨

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⭐ RETURN ⭐

• true — if optimized 💖
• (and, iykyk, anything that isn't true means you got the other thing 🙈)

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🌈 CONTEXT 🌈

Any context. fr fr, any context — she's flexible like that 🧚

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🔥 SEE ALSO 🔥

Kernel file ./include/crypto/sha2.h — and honestly the whole sha2 extended universe is here, so buckle up buttercup, we're listing every single one 👑

• struct sha224_ctx(9)
• sha224_init(9)
• sha224_update(9)
• sha224_final(9)
• sha224(9)
• struct hmac_sha224_key(9)
• struct hmac_sha224_ctx(9)
• hmac_sha224_preparekey(9)
• hmac_sha224_init(9)
• hmac_sha224_init_usingrawkey(9)
• hmac_sha224_update(9)
• hmac_sha224_final(9)
• hmac_sha224(9)
• hmac_sha224_usingrawkey(9)
• struct sha256_ctx(9)
• sha256_init(9)
• sha256_update(9)
• sha256_final(9)
• sha256(9)
• sha256_finup_2x(9)
• struct hmac_sha256_key(9)
• struct hmac_sha256_ctx(9)
• hmac_sha256_preparekey(9)
• hmac_sha256_init(9)
• hmac_sha256_init_usingrawkey(9)
• hmac_sha256_update(9)
• hmac_sha256_final(9)
• hmac_sha256(9)
• hmac_sha256_usingrawkey(9)
• struct sha384_ctx(9)
• sha384_init(9)
• sha384_update(9)
• sha384_final(9)
• sha384(9)
• struct hmac_sha384_key(9)
• struct hmac_sha384_ctx(9)
• hmac_sha384_preparekey(9)
• hmac_sha384_init(9)
• hmac_sha384_init_usingrawkey(9)
• hmac_sha384_update(9)
• hmac_sha384_final(9)
• hmac_sha384(9)
• hmac_sha384_usingrawkey(9)
• struct sha512_ctx(9)
• sha512_init(9)
• sha512_update(9)
• sha512_final(9)
• sha512(9)
• struct hmac_sha512_key(9)
• struct hmac_sha512_ctx(9)
• hmac_sha512_preparekey(9)
• hmac_sha512_init(9)
• hmac_sha512_init_usingrawkey(9)
• hmac_sha512_update(9)
• hmac_sha512_final(9)
• hmac_sha512(9)
• hmac_sha512_usingrawkey(9)

like yes, that's a lot of friends, but they're all family at this point 🍓

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heads up bestie: this page only tells you whether you're optimized — it does not promise anything about how the check is done internally, so don't go writing a whole essay about it, mwah 💋

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and that's the vibe check, periodt 💜 this lil cutie came out of ./include/crypto, October 2026 edition — go forth and check your optimization status, main character 🎀🫶✨