devm_ioremap(9)

💖 devm_ioremap — the Kernel API Manual, bestie edition 🎀

okay so this is devm_ioremap(9) from the Kernel API Manual and it's literally the managed remap girlie you've been looking for ✨

---

🌸 NAME 🌸

devm_ioremap — Managed ioremap(), no cap 💅

---

🦋 SYNOPSIS 🦋

void __iomem * devm_ioremap (struct device *dev , resource_size_t offset
, resource_size_t size );

like, three args, one pointer back, we love a clean signature 🫶

---

✨ ARGUMENTS ✨

• dev — the generic device you're remapping the IO address for 🎀 she's the main character here, everything's tied to her
• offset — the resource address you wanna map, iykyk 📍
• size — how big the map is, bestie. the size. of the map. 💀

---

🔥 DESCRIPTION 🔥

Managed ioremap. periodt 💅

The map is automatically unmapped on driver detach — so you don't gotta remember to clean up yourself, she handles it. literally the whole point. iconic behaviour fr fr 👑

not me being obsessed with automatic cleanup… devm girlies stay winning 🧚

---

👑 SEE ALSO 👑

Kernel file ./lib/devres.c and her whole friend group:

• devm_ioremap_uc(9)
• devm_ioremap_wc(9)
• devm_iounmap(9)
• devm_ioremap_resource(9)
• devm_ioremap_resource_wc(9)
• devm_ioport_map(9)
• devm_ioport_unmap(9)
• devm_arch_phys_wc_add(9)
• devm_arch_io_reserve_memtype_wc(9)

like… the whole devres squad showed up 🌈💜

---

and that's the page!! 🍓

cute little sign-off: this one lives in ./lib, dated October 2026, and yeah — it's devm_ioremap(9) all the way down, bestie 🫶💖 mwah, go map something responsibly ✨