radeon_scratch_free(9)

📦 version 7.3.1, in nixpkgs unstable

💖 radeon_scratch_free(9) — the "give the scratch register back" girlie ✨

Okay so this is a page from the Kernel API Manual family, and bestie, it is short but it's important. We're talking about radeon_scratch_free — the function that hands a scratch register back when the driver is done with it. No cap, that's the whole vibe. 🎀

🌸 NAME 🌸

radeon_scratch_free — free a scratch register 🫶

✨ SYNOPSIS ✨

void radeon_scratch_free (struct radeon_device *rdev , uint32_t reg );

That's it. That's the whole signature. Two arguments, returns nothing, slays quietly. 💅

🦋 ARGUMENTS 🦋

  • rdev — a radeon_device pointer. Like, the actual Radeon device we're talking about here. 👑
  • reg — the scratch register mmio offset. This is the one you're freeing, bestie.

💜 DESCRIPTION 💜

So what does it do? It frees a CP scratch register that was allocated for use by the driver — and yes, that's for all asics. Every single one. No exceptions, no picking favourites. 🌈

Literally it's the cleanup counterpart: somebody grabbed a scratch register, and now it goes back into the pool. Main character energy for the release path. 🔥

Ngl, this is the kind of function where the docs are shorter than the function name. But every detail counts, so here it is, fr fr.

🌟 SEE ALSO 🌟

The kernel file lives at ./drivers/gpu/drm/radeon/radeon_device.c — that's where you'll find the goods, iykyk. 💖

And here's the full squad, all the friends in the SEE ALSO group chat — every single one, not skipping anybody:

That's 38 references, and we listed all of them because we don't do that "…and others" thing here. 💀

Okay that's the whole page, you're officially a scratch-register free-er now 💜

This little love letter comes to you from the ./drivers/gpu/drm/radeon corner of the kernel, in the October 2026 edition of the Kernel API Manual — same manual, same date, same radeon_scratch_free(9) energy. Bye bestie, go free a register responsibly! 🧚‍♀️🌸

📦 where this page comes from