kfifo_dma_in_finish(9)

📦 version 7.3.1, in nixpkgs unstable

💅 kfifo_dma_in_finish(9) — the Kernel API Manual glow-up 🎀

okay so this is a page straight out of the Kernel API Manual, bestie — it's kfifo_dma_in_finish(9) and it's lowkey the "and we're done here" moment for a DMA IN operation ✨

🌸 NAME

kfifo_dma_in_finish — finish a DMA IN operation 🏁

🦋 SYNOPSIS

kfifo_dma_in_finish (fifo , len );

💖 ARGUMENTS

  • fifo — address of the fifo to be used 📬 (like, the actual fifo you're working with, not a vibe)
  • len — number of bytes to received 🍓 (yes it says "to received", we don't fix the ancestors' grammar, we just respect it)

🔥 DESCRIPTION

so this macro finishes a DMA IN operation — it's the closing credits, the final bow, the "ok we're done" text 🫶 The in counter gets updated by the len parameter, and that's literally it.

⚠️ no error checking will be done. none. zero. not a single check. it trusts you completely, which is either iconic or terrifying depending on your day 💀

and here's the little grace note: with only one concurrent reader and one concurrent writer, you don't need extra locking to use these macros 👑 periodt. (that's the deal — just don't go adding more readers and writers and expect the same energy, iykyk)

🌈 SEE ALSO

the whole kfifo cinematic universe lives in the kernel file ./include/linux/kfifo.h 📁 and honestly? the friend group is huge. here's everyone:

and that's the page!! 🧚💜 it came from ./include/linux, dated October 2026, and its whole full name is kfifo_dma_in_finish(9) — so go finish that DMA IN operation, bestie, you've got this 💅✨🌸

📦 where this page comes from