qcom_smem_bu...lock_by_host(9)

✨ qcom_smem_bust_hwspin_lock_by_host ✨

okay so bestie, welcome to the Kernel API Manual — this one's a cute lil helper function from the kernel, and honestly? it's giving "emergency button energy" 💅

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🌸 NAME 🌸

qcom_smem_bust_hwspin_lock_by_host — bust the smem hwspinlock for a host 🫶

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🦋 SYNOPSIS 🦋

int qcom_smem_bust_hwspin_lock_by_host (unsigned int host );

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🎀 ARGUMENTS 🎀

• host — the remote processor id, fr fr. that's literally it, that's the whole argument 🌈

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💖 DESCRIPTION 💖

So what does it do? It busts the hwspin_lock for the given smem host id. Like, it just goes in and breaks that lock free. iconic behavior honestly 💅

This helper is intended for remoteproc drivers — the ones that manage remoteprocs which have an equivalent smem driver instance living in the remote firmware. yk how that goes 🧚

And here's the main character moment: drivers can force a release of the smem hwspin_lock if the rproc unexpectedly goes into a bad state 😭 so if your remote processor is acting up and holding a lock hostage, this is the thing you call to be like "bestie, let it GO" 🔥

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⭐ CONTEXT ⭐

Process context. that's it. that's the vibe check — you're running in process context, no weird interrupt shenanigans 🙈

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👑 RETURN 👑

• 0 on success 🎉
• otherwise negative errno (sad girl hours 😔)

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🍓 SEE ALSO 🍓

• Kernel file ./drivers/soc/qcom/smem.c
• struct smem_proc_comm(9)
• struct smem_global_entry(9)
• struct smem_header(9)
• struct smem_ptable_entry(9)
• struct smem_ptable(9)
• struct smem_partition_header(9)
• struct smem_partition(9)
• struct smem_private_entry(9)
• struct smem_info(9)
• struct smem_region(9)
• struct qcom_smem(9)
• qcom_smem_is_available(9)
• qcom_smem_alloc(9)
• qcom_smem_get(9)
• qcom_smem_get_free_space(9)
• qcom_smem_virt_to_phys(9)
• qcom_smem_get_soc_id(9)
• qcom_smem_get_feature_code(9)

like, that's a whole friend group of smem references right there — go read them all if you're obsessed with smem the way I am 💜

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and that's the whole page bestie 💖 this one came from ./drivers/soc/qcom in October 2026, and it's filed under qcom_smem_bu...lock_by_host(9) in the Kernel API Manual. slay, go bust some locks (responsibly) 🎀✨