dma_fence_context_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dma_fence_context_alloc(9) — the Kernel API Manual page, but make it make sense 🎀

okay so bestie, this is a page from the Kernel API Manual, and it's about handing out fence contexts like they're wristbands at the door of the club 🎟️✨

✨ NAME ✨

dma_fence_context_alloc — allocate an array of fence contexts 🦋

🌸 SYNOPSIS 🌸

u64 dma_fence_context_alloc (unsigned num );

💖 ARGUMENTS 💖

  • num — the amount of contexts you wanna allocate, literally just how many you're asking for 🫶

👑 DESCRIPTION 👑

So here's the vibe: this function returns the first index of the number of fence contexts it just allocated. That's the leading number of your shiny new block of contexts, bestie 💅

And what's a fence context even for? It's the thing you use for setting dma_fence.context to a unique number — you do that by passing the context into dma_fence_init. That's it, that's the whole job. Unique number in, uniqueness achieved, iconic behavior only ✨

🌈 SEE ALSO 🌈

like, the whole friend group tbh 💜 — and also the kernel file ./drivers/dma-buf/dma-fence.c:

okay that's the whole page, no notes 💀🫶 this one lives in ./drivers/dma-buf and the page itself is dated October 2026 — so like, yeah, a lil time traveler moment, slay ⭐🧚‍♀️ bye bestie 💖

📦 where this page comes from