ioremap_wt(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 NAME 🌸

ioremap_wt — map memory into CPU space, write through 💅

okay so bestie, welcome to the Kernel API Manual! This page is ioremap_wt(9), and it's literally about mapping memory into CPU space with write-through energy. ✨

✨ SYNOPSIS ✨

void __iomem * ioremap_wt (resource_size_t phys_addr , unsigned long size );

🎀 ARGUMENTS 🎀

  • phys_addr — bus address of the memory
  • size — size of the resource to map

💅 DESCRIPTION 💅

okay so this version of ioremap makes sure the memory is marked write through. Write through stores data into memory while keeping the cache up-to-date. Iconic, no cap. 🧚

💀 real talk: it must be freed with iounmap. Do not ghost it.

🔥 SEE ALSO 🔥

Kernel file: ./arch/x86/mm/ioremap.c — and the squad is:

mwah 💋 this page comes from ./arch/x86/mm, dated October 2026. 🫶

📦 where this page comes from