dm_test_wb_c...up_job_no_fb(9)

💅 dm_test_wb_cleanup_job_no_fb(9) — a whole page from your fave, the Kernel API Manual ✨

okay so bestie, buckle up, because this one is a tiny little KUnit test with main character energy. It lives in the Kernel API Manual (yes, that's the manual name, we're being fancy today 💅) and it's basically a vibe check for one specific "nothing to do here" moment.

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🌸 NAME 🌸

dm_test_wb_cleanup_job_no_fb — this one verifies that cleanup_job does an early return when there's, like, no framebuffer at all. No fb, no problem, we bounce 🫶

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✨ SYNOPSIS ✨

void dm_test_wb_cleanup_job_no_fb (struct kunit *test );

literally that's it. one function, zero drama, she's lowkey minimal.

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🎀 ARGUMENTS 🎀

• test — the KUnit test context, aka the little group-chat thread this test gets to run inside 🧚

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💖 DESCRIPTION 💖

So here's the tea: when job->fb is NULL, there is genuinely nothing to unpin. Nothing. Zero. Nada. So amdgpu_dm_wb_cleanup_job has got to return immediately — like, the second it peeks at that NULL it should be out the door, no extra steps, no lingering 😭

That's the whole test. It checks that the early return actually happens. Iconic behaviour honestly, we love a clean exit. 👑

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🌈 SEE ALSO 🌈

• Kernel file — ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_wb_test.c (the source, the origin story, the blueprint 💜)
• dm_test_wb_atomic_check_no_job(9)
• dm_test_wb_atomic_check_no_fb(9)
• dm_test_wb_atomic_check_valid(9)
• dm_test_wb_atomic_check_size_mismatch(9)
• dm_test_wb_atomic_check_width_mismatch(9)
• dm_test_wb_atomic_check_height_mismatch(9)
• dm_test_wb_atomic_check_invalid_format(9)
• dm_test_wb_get_modes_returns_modes(9)
• dm_test_wb_get_modes_bounded_by_max(9)
• dm_test_wb_connector_init_success(9)
• dm_test_wb_prepare_job_no_fb(9)

like, the whole friend group. go read them too, iykyk 🦋

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ngl if you skipped the description, please go back — the entire point is that job->fb being NULL means there is nothing to unpin and amdgpu_dm_wb_cleanup_job must return immediately. that's the test. that's the whole test. periodt. 💀

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and that's the page!! footer core: this gorgeous thing comes from ./drivers/gpu/drm/amd/display/..., dated October 2026, and she answers to the name dm_test_wb_c...up_job_no_fb(9). mwah, stan, bye bestie 💅💖🎀⭐