dm_test_hdcp...nks_null_srm(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_hdcp...nks_null_srm — a Kernel API Manual moment 🎀

okay so bestie, welcome to the Kernel API Manual page for dm_test_hdcp...nks_null_srm(9) — yes the title is literally abbreviated with dots, she's mysterious like that ✨

🌸 NAME 🌸

dm_test_hdcp_destroy_zero_links_null_srm — teardown, but make it the easy mode: zero links, and a big fat SRM of NULL 🫶

✨ SYNOPSIS ✨

void dm_test_hdcp_destroy_zero_links_null_srm (struct kunit *test );

like, that's the whole signature. no cap 💅

🦋 ARGUMENTS 🦋

  • test — the KUnit test context 🌈 (the little sandbox the test lives in, iykyk)

💖 DESCRIPTION 💖

so the vibe here is teardown, and it's giving "nothing to see here, and that's the point" 😌

when max_link == 0, the cancel loop is skipped entirely — not run zero times slowly, skipped, bestie ⭐ and since srm / srm_temp are NULL, those kfree calls are literally no-ops 🍓

and yet — and this is the main character energy part — hdcp_destroy must still remove the sysfs bin file 📁 and free the workqueue 🧵 without crashing 💀 like, no links, no SRM, and she still has to clean up her room. periodt.

fr fr: the whole test is "does destroy survive when it has basically nothing to destroy." dramatic? no. important? yes 🫶

👑 SEE ALSO 👑

Kernel file 🧚

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

and the whole ✨squad✨ of related pages, in order:

that's the whole page, bestie 💜 mwah 💋

and the cute sign-off: this lil page lives under ./drivers/gpu/drm/amd/display/... and it's dated October 2026 — she's from the future, iconic 👑✨🦋

📦 where this page comes from