spu_mb_init(9)

💌 spu_mb_init(9) — a Kernel API Manual moment

okay so bestie, we're in the Kernel API Manual today and the page is spu_mb_init(9), and honestly? it's giving "small function, big responsibilities" 💅

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✨ NAME ✨

spu_mb_init — Initialize mailbox client. Request ownership of a mailbox channel for the SPU being probed.

like, literally that's the whole job: grab the mailbox channel for the SPU that's currently being probed 🎀

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🌸 SYNOPSIS 🌸

int spu_mb_init (struct device *dev );

(yes the space before ); is canon, don't come for me 🙈)

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🦋 ARGUMENTS 🦋

• dev — the SPU driver device structure 🫶 that's it, that's the whole parameter list, we love a one-arg icon

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⭐ RETURN ⭐

0 if successful, < 0 otherwise 🌈

so like, zero means slay, negative means something went sideways 😭

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👑 SEE ALSO 👑

bestie the cross-reference list is LONG and honestly it ate:

• Kernel file ./drivers/crypto/bcm/cipher.c 📁
• select_channel(9)
• spu_skcipher_rx_sg_create(9)
• spu_skcipher_tx_sg_create(9)
• handle_skcipher_req(9)
• handle_skcipher_resp(9)
• spu_ahash_rx_sg_create(9)
• spu_ahash_tx_sg_create(9)
• handle_ahash_req(9)
• spu_hmac_outer_hash(9)
• ahash_req_done(9)
• handle_ahash_resp(9)
• spu_aead_rx_sg_create(9)
• spu_aead_tx_sg_create(9)
• handle_aead_req(9)
• handle_aead_resp(9)
• spu_chunk_cleanup(9)
• finish_req(9)
• spu_rx_callback(9)
• skcipher_enqueue(9)
• spu_no_incr_hash(9)
• aead_gcm_esp_setkey(9)
• rfc4543_gcm_esp_setkey(9)
• aead_ccm_esp_setkey(9)
• spu_functions_register(9)

that's twenty-four little links and every single one of them matters, iykyk 🔥

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ngl if you're reading this while writing SPU driver code, hydrate, take a break, and remember: 0 good, < 0 bad 💀

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mwah 💖 this has been spu_mb_init(9) from the ./drivers/crypto/bcm source, October 2026 edition — drink water, check your return values, and stan a well-documented kernel function for clear skin ✨🎀🦋