drm_kunit_h...alloc_device(9)

💅 drm_kunit_h...alloc_device(9) — Kernel API Manual, but make it a group chat

okay so bestie, we're in the Kernel API Manual today and this page is literally about drm_kunit_helper_alloc_device — say it with me, it's a mouthful, but she's iconic. Let's get into it 🎀

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✨ NAME ✨

drm_kunit_helper_alloc_device — she allocates a mock device for a KUnit test. that's it, that's the whole job, and she does it flawlessly 👑

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🦋 SYNOPSIS 🦋

struct device * drm_kunit_helper_alloc_device (struct kunit *test );

yes bestie that's the whole signature, keep it exactly like that, no cap 🫶

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🌸 ARGUMENTS 🌸

• test — the test context object 💖 that's your lil' KUnit world, she needs it to exist

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💀 DESCRIPTION 💀

so what does she actually do. okay so: this allocates a fake struct device to create a mock for a KUnit test. a mock, a little stand-in, a stunt double if you will 🧚

and here's the slay part — the device also gets bound to a fake driver. so she's not just sitting there looking pretty, she can actually leverage the usual infrastructure, and most notably the device-managed resources, just like a "real" device 😭 literally the main character energy of test fixtures.

resources get cleaned up automatically (love that for us, no manual cleanup era 🙈), but if you're impatient — and same — the removal can be forced using drm_kunit_helper_free_device.

fr fr: auto-cleanup is the default vibe, but forced removal is a whole option, so know it exists 💅

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⭐ RETURN ⭐

she returns a pointer to the new device 💖 … or an ERR_PTR otherwise. so like, check your pointers bestie, don't just assume she ate 🍓

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/tests/drm_kunit_helpers.c
• drm_kunit_helper_free_device(9)
• drm_kunit_helper_atomic_state_alloc(9)
• drm_kunit_helper_create_primary_plane(9)
• drm_kunit_helper_create_crtc(9)
• drm_kunit_helper_enable_crtc_connector(9)
• drm_kunit_add_mode_destroy_action(9)
• drm_kunit_display_mode_from_cea_vic(9)

the whole squad, all linked, all iconic 👑

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okay that's the page!! shoutout to ./drivers/gpu/drm/tests for housing her, and this one's dated October 2026 — mark your calendars bestie 🗓️💜 byeee, go write some tests, periodt ✨