dm_test_wb_a...check_no_job(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_wb_atomic_check_no_job(9) — like, the Kernel API Manual edition 🎀

okay bestie, sit down, we're doing kernel testing today and honestly? this one's a little cutie. it's from the Kernel API Manual, and yes the name is a whole mouthful — dm_test_wb_atomic_check_no_job(9) — but it's literally just a KUnit test that checks the boring-but-important case. slay.

✨ NAME ✨

dm_test_wb_atomic_check_no_job — verify that the function bails out early when there's, like, no writeback job. no job, no problem, we return early. periodt.

🦋 SYNOPSIS 🦋

void dm_test_wb_atomic_check_no_job (struct kunit *test );

🌸 ARGUMENTS 🌸

  • test — the KUnit test context. that's it. that's the whole argument. she's low-maintenance 💅

💖 DESCRIPTION 💖

okay so here's the vibe: when conn_state->writeback_job is NULL, that means no writeback was actually requested. and when nothing's requested, the function should just return 0 and not go off doing extra validation for no reason. no cap — early return, zero drama, the end. 🫶

it's giving "respect the short circuit" energy, honestly. iconic behaviour.

🔥 SEE ALSO 🔥

the kernel file lives right here, bestie:

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

and here's the whole friend group — go say hi 👋

💀 real talk though, don't sleep on the no-job path — if this test fails, something's validating stuff it shouldn't be, and that's a whole mess. keep it green, bestie.

and that's the page!! 🎀 source/version is ./drivers/gpu/drm/amd/display/... and it's dated October 2026 — so like, future girl summer. bye bestie, go write some tests 💜🌈⭐

📦 where this page comes from