devm_kmemdup_const(9)

💅 devm_kmemdup_const — kernel API manual, but make it make sense ✨

okay so bestie, welcome to devm_kmemdup_const(9), straight out of the Kernel API Manual 🎀 this one is short, it's sweet, and it's giving "manager energy" — because it doesn't just duplicate your memory, it manages it for you too. no cap 🫶

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✨ NAME ✨

devm_kmemdup_const — conditionally duplicate and manage a region of memory 💖

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🦋 SYNOPSIS 🦋

const void * devm_kmemdup_const (struct device *dev , const void *src ,
size_t len , gfp_t gfp );

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🌸 ARGUMENTS 🌸

• dev — the device this memory belongs to, like the whole thing is registered under its name 👑
• src — the memory region to duplicate, the og copy, the blueprint 🎀
• len — memory region length, (yes the comma is canon, don't come for me) 📏
• gfp — the GFP mask to use, that's the flavour of allocation, iykyk 🌈

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💀 RETURN 💀

it hands you back the source address if that address is in .rodata — like, it literally just points at the og constant and goes "that's already perfect, why would I copy it" 💅

otherwise? it falls back to the return value of kmemdup 🔁 so you get a fresh copy, no cap.

lowkey important: the "conditionally" in the name is doing real work here fr fr — .rodata means no duplication, everything else means kmemdup city ✨

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🔥 SEE ALSO 🔥

Kernel file ./drivers/base/devres.c — the whole devres family, and honestly bestie, it's a whole friend group 🫶

• __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_destroy(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_get_free_pages(9)
• devm_free_pages(9)
• __devm_alloc_percpu(9)

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and that's the whole page, bestie, you ate that 💅✨

sign-off szn 🎀: this icon lives in ./drivers/base, the date on the tin is October 2026, and the source/version is the Kernel API Manual itself — go forth and duplicate responsibly 👑🦋💜