debug_register(9)

📦 version 7.3.1, in nixpkgs unstable

✨ debug_register(9) ✨

okay so this is debug_register(9) from the Kernel API Manual (section 9 ofc, we love a kernel function page 💅) — it's the glow-up ritual that makes a brand-new debug area and sets it up with the default file mode. let's get into it 🎀

🌸 NAME 🌸

debug_register — creates and initializes a debug area with default file mode</p>. literally its whole personality. ✨

🦋 SYNOPSIS 🦋

debug_info_t * debug_register (const char *name , int pages_per_area ,
int nr_areas , int buf_size );

like yes bestie it's one line (okay two, don't come for me) and it hands you back a debug_info_t * 🫶

💖 ARGUMENTS 💖

  • name — the name of the debug log. it's the one that gets used for the debugfs entry, so pick something cute and identifiable 🌸
  • pages_per_area — how many pages get allocated per area. yes, per area, that's the vibe 🔥
  • nr_areas — the number of debug areas. more areas = more places to keep your stuff 🌈
  • buf_size — the size of the data area inside each individual debug entry 🍓

⭐ RETURN ⭐

  • 🫶 the handle for the debug area you just generated — iconic, slay
  • 💀 NULL if the register failed. ngl if you see this, something went sideways

👑 DESCRIPTION 👑

so what it actually does: it allocates memory for a debug log. that's the main character move 💅

the debugfs file mode access permissions are read and write for user — that's the default it's rolling with, no cap.

⚠️ real talk: this must not be called within an interrupt handler. like, don't. fr fr. 🙈

🧚 SEE ALSO 🧚

bestie go read these next, they're all in Kernel file ./arch/s390/kernel/debug.c:

kay that's the whole page, hope it ate 💜 this one lives in ./arch/s390/kernel, and it's stamped October 2026 — so like, future vibes only. byeeee 🦋✨

📦 where this page comes from