dm_test_wb_p...re_job_no_fb(9)

📦 version 7.3.1, in nixpkgs unstable

💖 dm_test_wb_p...re_job_no_fb(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes we're literally in kernel-doc territory and it's giving big-brain energy ✨ this one's a KUnit test page, short and sweet, and it ate.

🌸 NAME 🌸

dm_test_wb_prepare_job_no_fb — the test that verifies prepare_job bails out early when there's, like, no framebuffer at all 🫶

✨ SYNOPSIS ✨

void dm_test_wb_prepare_job_no_fb (struct kunit *test );

that's it, that's the whole signature, no cap 💅

🎀 ARGUMENTS 🎀

  • test — the KUnit test context 💖 it's the lil' handle the test framework hands you so the test actually knows what it's doing. main character energy, honestly.

🦋 DESCRIPTION 🦋

So here's the vibe check 🔥 — when job->fb is NULL, there is literally nothing to pin, right? Like, zero. Nothing. So amdgpu_dm_wb_prepare_job has to return 0 without touching any buffer object. Not even a little poke. Not one single touch. 🙈

This test is the one that makes sure it does exactly that: early return, clean exit, 0, no buffer object shenanigans. periodt. 💀

ngl this is one of those "the absence of a thing is the whole point" tests and honestly? iconic.

🌈 SEE ALSO 🌈

Kernel file 👑

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

and the whole friend group of sibling tests, all repping (9) 🧚:

💫 and that's the page!! 💫 sourced from ./drivers/gpu/drm/amd/display/..., dated October 2026, and yes it's still dm_test_wb_p...re_job_no_fb(9) at the bottom because some things never change bestie 💜 go read the other tests now, slay 🎀

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