devm_release_resource(9)

💅 devm_release_resource — the Kernel API Manual, but make it make sense 🎀

okay so bestie, you know how there's that whole managed resource thing in the kernel? yeah. this is the ✨release✨ side of it. it lives in the Kernel API Manual, and honestly it's short, it's sweet, it's giving "one job, does it well." 💖

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✨ NAME ✨

devm_release_resource — release a previously requested resource 🦋

like, you asked for it, now you're giving it back. closure. character development. we love to see it. 💅

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✨ SYNOPSIS ✨

void devm_release_resource (struct device *dev , struct resource *new );

yes, the parameter is literally called new. no, i don't know why either. we don't ask questions, we just pass it. 😭

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✨ ARGUMENTS ✨

• dev — the device you're releasing the resource for. your main character device, if you will. 👑
• new — the descriptor of the resource you're releasing. it's the little receipt for the thing you grabbed earlier. 🧾

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✨ DESCRIPTION ✨

so here's the whole vibe: this releases a resource that was previously requested using devm_request_resource. that's it. that's the function. 🫶

the devm_ prefix means it's a managed resource, so normally the kernel cleans up after you when the device goes away — but if you want to hand it back early, this is your girl. lowkey iconic of you to be proactive ngl. ✨

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✨ SEE ALSO ✨

okay this is the part where the kernel goes full "you may also like" algorithm and honestly? respect the hustle. it's all in Kernel file ./kernel/resource.c, and here's the whole squad: 🌈

• request_resource_conflict(9)
• request_resource(9)
• release_resource(9)
• find_next_res(9)
• walk_iomem_res_desc(9)
• region_intersects(9)
• find_resource_space(9)
• reallocate_resource(9)
• allocate_resource(9)
• lookup_resource(9)
• insert_resource_conflict(9)
• insert_resource(9)
• insert_resource_expand_to_fit(9)
• remove_resource(9)
• adjust_resource(9)
• resource_alignment(9)
• __request_region(9)
• __release_region(9)
• release_mem_region_adjustable(9)
• merge_system_ram_resource(9)
• devm_request_resource(9)
• devm_request_free_mem_region(9)
• alloc_free_mem_region(9)

that's the entire friend group. go say hi. 🦋

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bestie reminder: this page releases what devm_request_resource grabbed. don't be out here releasing things you never requested — that's not a vibe, that's a bug. 💀

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and that's the tea, babe 💜 — from the ./kernel source, dated October 2026, brought to you by the Kernel API Manual. now go forth, release your resources responsibly, and slay ✨🌸🎀