fm10k_mbx_index_len(9)

📦 version 7.3.1, in nixpkgs unstable

💖 fm10k_mbx_index_len — from the Kernel API Manual ✨

okay so bestie, we're diving into fm10k_mbx_index_len, which lives in the Kernel API Manual (section 9, kernel developer land 🧚). it's a tiny little helper, but it's got a job and it does it, and honestly? we stan a focused function. 🫶

✨ NAME ✨

fm10k_mbx_index_len — the glow-up from a head/tail index pair into an actual length value 💅

🌸 SYNOPSIS 🌸

u16 fm10k_mbx_index_len (struct fm10k_mbx_info *mbx , u16 head , u16
tail );

like, look at her. returns a u16, takes a struct fm10k_mbx_info * plus two u16s, and yes the line wraps exactly like that, we don't editorialize 🎀

🦋 ARGUMENTS 🦋

  • mbx — pointer to mailbox. that's your struct fm10k_mbx_info *, the whole vibe container 💌
  • head — head index 👑
  • tail — head index. and yes, the manual literally says "head index" here too, not once but twice — bestie i'm quoting it verbatim, do not come for me 🙈

💀 DESCRIPTION 💀

so what does she do? this function takes the head and tail index and determines the length of the data indicated by this pair. that's it. that's the whole thing. head + tail in, length out, no cap 🔥

it's giving "small function, big responsibilities" — main character energy for real 👑

🌈 SEE ALSO 🌈

the friend group is LARGE and i love that for them. here's everyone, keeping it 100%:

i literally listed every single one because that's what she deserves 💜

and that's a wrap, bestie 🎀 this page dropped from ./drivers/net/ethernet/intel/f... back in October 2026 — slay, iconic, no notes. go forth and convert those head/tail pairs into lengths 💖✨🦋

📦 where this page comes from