dm_test_upda...ect_mst_noop(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_upda...ect_mst_noop(9) — like, the Kernel API Manual page, bestie 🎀

okay so this is a section 9 (kernel API) man page, and yes the title is literally truncated with ... in the middle — dm_test_upda...ect_mst_noop(9) — that's not a typo, that's just how it's filed, iykyk. It's a KUnit test in the amdgpu display driver world and it's short, sweet, and honestly iconic for how little it has to do.

✨ NAME ✨

dm_test_update_after_detect_mst_noop — the test that checks MST connectors get left entirely to drm_mst. That's the whole personality. 🦋

✨ SYNOPSIS ✨

void dm_test_update_after_detect_mst_noop (struct kunit *test );

🌸 ARGUMENTS 🌸

  • test — the KUnit test context. Standard issue, hand it over and let the framework do its thing 💖

💅 DESCRIPTION 💅

So here's the vibe check: an MST connector is handled by the drm_mst framework, right? Which means this function just returns immediately — like, immediately immediately — and never dereferences the (NULL) dc_link. 🫶

Not me being obsessed with a test whose entire job is "don't touch the NULL pointer." That's it. That's the test. It's giving "I did nothing and I did it flawlessly." Periodt. 👑

fr fr: the point is that it returns right away and the dc_link being NULL is fine — the function never dereferences it. Do not go reading that NULL like it's a problem, because it isn't one. 💀

🔥 SEE ALSO 🔥

The source it lives in, first of all:

  • ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_connector_test.c

and then, okay, buckle up, because the family tree is huge — every one of its sibling tests, section 9, all of them, no exceptions, no skips, we're listing them all because they're all part of the squad 🌈:

okay that's genuinely the whole page 💖 go read the neighbours, they're all in the same file, no cap. 🌟

tiny sign-off moment 🎀 — this page lives at ./drivers/gpu/drm/amd/display/... in the kernel tree and the man page itself is dated October 2026. mwah, bye bestie! 💅✨
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