devres_destroy(9)

💅 devres_destroy(9) — from the Kernel API Manual, bestie 🎀

okay so this is devres_destroy(9), straight out of the Kernel API Manual, and it's about finding a device resource and just… yeeting it. no cap. let's get into it ✨

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🌸 NAME 🌸

devres_destroy — bestie, it finds a device resource and destroys it. that's the whole vibe. 💀

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✨ SYNOPSIS ✨

int devres_destroy (struct device *dev , dr_release_t release ,
       dr_match_t match , void *match_data );

like, look at that signature. iconic. four args, one int back. periodt. 👑

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🫶 ARGUMENTS 🫶

• dev — the device you're pulling the resource out of. this is your main character. 🌟
• release — look for resources associated with this release function. that's the little tag you're matching on, iykyk. 🏷️
• match — the match function, and heads up: it's optional. yes bestie, optional, we love a flexible queen. 🙈
• match_data — the data you're feeding into that match function. 🍓

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💖 DESCRIPTION 💖

so what this does is: it finds the latest devres of dev that's associated with release and for which match returns 1. and if match is NULL? it's considered to match all — no filter, we're accepting everyone at the door. 🌈

if it finds one, the resource is removed atomically and freed. boom. gone. slay. 🔥

⚠️ but bestie, listen, this part is important: the release function for the resource will not be called. only the devres-allocated data gets freed. so the caller — that's you — becomes responsible for freeing any other data. no cap, don't forget. 😭

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⭐ RETURN ⭐

• 0 if the devres is found and freed. ate. 💅
• -ENOENT if it's not found. she wasn't there, we looked, moving on. 🦋

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🧚 SEE ALSO 🧚

the whole friend group, honestly — first up, the kernel file ./drivers/base/devres.c, and then:

• __devres_alloc_node(9)
• devres_for_each_res(9)
• devres_free(9)
• devres_add(9)
• devres_find(9)
• devres_get(9)
• devres_remove(9)
• devres_release(9)
• devres_release_all(9)
• devres_open_group(9)
• devres_close_group(9)
• devres_remove_group(9)
• devres_release_group(9)
• __devm_add_action(9)
• devm_remove_action_nowarn(9)
• devm_release_action(9)
• devm_kmalloc(9)
• devm_krealloc(9)
• devm_kstrdup(9)
• devm_kstrdup_const(9)
• devm_kvasprintf(9)
• devm_kasprintf(9)
• devm_kfree(9)
• devm_kmemdup(9)
• devm_kmemdup_const(9)
• devm_get_free_pages(9)
• devm_free_pages(9)
• __devm_alloc_percpu(9)

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okay that's the whole page, ily, go free your memory responsibly 🎀

sign-off szn: this one lives under ./drivers/base, dated October 2026, and it's devres_destroy(9) — catch you in the next one, bestie 💜