drm_gem_unmap_dma_buf(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_gem_unmap_dma_buf — like the kernel API manual, but make it make sense

okay so bestie, gather round, because we're talking about drm_gem_unmap_dma_buf(9) today and honestly? she's a supporting character with main character energy. this is the kernel API manual page for her, and yes we're reading the whole thing, no skipping 🎀

✨ NAME ✨

drm_gem_unmap_dma_buf — the unmap_dma_buf implementation for GEM. that's it, that's the tweet. she unmaps. she's GEM's girl. periodt 💅

🌸 SYNOPSIS 🌸

void drm_gem_unmap_dma_buf (struct dma_buf_attachment *attach , struct
       sg_table *sgt , enum dma_data_direction dir );

literally just three little arguments and a whole lot of "please clean up after yourself" energy. no return value, because she's not here to give you answers, she's here to unmap. 🦋

🧚 ARGUMENTS 🧚

  • attach — the attachment you're unmapping the buffer from. think of it as the situationship you're officially closing out 💀
  • sgt — the scatterlist info of the buffer that's getting unmapped. the actual memory gossip, in list form ✨
  • dir — the direction of the DMA transfer. yes it matters, no you cannot skip it 🙈

🔥 DESCRIPTION 🔥

lowkey the whole point: this function can be used as the dma_buf_ops.unmap_dma_buf callback. that's the vibe. she slots right in, does her thing, and the kernel is obsessed with her for it. no cap 🫶

ngl bestie, she doesn't come with a novel of a description — she's a callback, not a saga. the whole job is be the dma_buf_ops.unmap_dma_buf callback, and she ate. 👑

⭐ SEE ALSO ⭐

okay this list is LONG, so buckle up, we're going through every single one because i would never do you dirty like that 💖

that's the whole squad. she's the social butterfly of drm_prime.c, truly 🦋🌈

and that's the page, bestie! this iconic little entry comes to you from ./drivers/gpu/drm and is dated October 2026 — so when you cite your sources, you cite drm_gem_unmap_dma_buf(9), and you cite it with your whole chest 💜✨🎀

📦 where this page comes from