devm_ioremap_wc(9)

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

Okay so real quick, this page is devm_ioremap_wc(9) and it lives in the Kernel API Manual — yes, capital letters, it's That Girl. We're talking about managed IO remapping today and honestly it's iconic.

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✨ NAME ✨

devm_ioremap_wc — the managed version of ioremap_wc(), and it ate. 🎀

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🦋 SYNOPSIS 🦋

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

Look at her. Beautiful. Returns a void __iomem *, takes three things, done.

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🌸 ARGUMENTS 🌸

• dev — the generic device you're remapping the IO address for. Like, the whole reason the "managed" part works, so don't forget her 🫶
• offset — the resource address you want to map. The where, basically.
• size — how big the map is. The how much. Slay.

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💖 DESCRIPTION 💖

It's managed ioremap_wc. No cap.

The map gets automatically unmapped on driver detach — that's the whole managed vibe, you literally don't have to clean up after yourself, the kernel does it for you. Main character energy tbh. 💅

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👑 SEE ALSO 👑

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

• devm_ioremap(9)
• devm_ioremap_uc(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)

All of them. Linked. Because that's how we do it. ⭐

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💀 Friendly reminder that this is kernel-level memory mapping, so like… it's giving "not a toy." Respect the map, bestie.

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And that's the page! Shoutout to ./lib for housing the source and to October 2026 for the timestamp — timestamped, sourced, and gorgeous. Bye bestie, go remap something responsibly 🧚‍♀️🌈💜