dm_test_proc..._zero_length(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 dm_test_proc..._zero_length — Kernel API Manual, section 9 🎀

okay so bestie, welcome to the manual page for dm_test_process_dmub_aux_transfer_sync_zero_length, straight out of the Kernel API Manual (that's section 9, iykyk) ✨

💅 NAME

dm_test_process_dmub_aux_transfer_sync_zero_length — literally the test for an AUX reply that comes back with no data at all 🫶

⭐ SYNOPSIS

void dm_test_process_dmub_aux_transfer_sync_zero_length (struct kunit
*test );

🦋 ARGUMENTS

  • test — the KUnit test context 💖 that's it, that's the whole argument list, she's low maintenance

✨ DESCRIPTION

So here's the vibe 🌈: when a notification comes back successful but its reply is carrying no data, the sync helper takes the zero-length branch. And then? It just returns the reply length (0) — no payload copying, no drama, no little data crumbs getting scattered anywhere 💀

That's the whole test. She's iconic for it. Periodt 🔥

👑 SEE ALSO

Kernel file:

./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_dmub_test.c

and like, all her friends 🧚 (this is the full guest list, no gatekeeping):

ngl bestie, that's a lot of siblings — but every single one of them is listed above, fr fr 💜

mwah, that's the page 🎀 This little writeup lives at ./drivers/gpu/drm/amd/display/... and it's dated October 2026, and yes it's still the dm_test_proc..._zero_length(9) page — same girl, same manual, zero-length and zero notes left out 💖✨💅

📦 where this page comes from