kunit_device...oftware_node(9)

📦 version 7.3.1, in nixpkgs unstable

✨ kunit_device_add_software_node — the function name is too long for the header, bestie, but we got the whole thing in here 💅

Okay so this page is straight out of the Kernel API Manual, section 9, and it's all about kunit_device_add_software_node — a function whose name is literally a whole vibe check on its own. Let's get into it 🧚

🌸 NAME 🌸

kunit_device_add_software_node — assign a kunit-managed software node to a device

That's the whole mission statement. A software node, but make it managed by kunit, and we're attaching it to a device. Obsessed. 🫶

🎀 SYNOPSIS 🎀

int kunit_device_add_software_node (struct kunit *test , struct device *dev , const struct software_node *node );

Three arguments, one int coming back at you. The way that signature just sits there. Iconic. ✨

🦋 ARGUMENTS 🦋

  • test — the test context. This is your kunit era, the whole reason we're here 💖
  • dev — the device you're assigning the software node for
  • node — the actual software node you're assigning. The main character of this operation, lowkey 👑

💜 DESCRIPTION 💜

So here's the tea: this function makes node the secondary firmware node of dev.

But wait — there's a plot twist. If dev has no primary firmware node at all, then node becomes the primary node. Not me getting promoted because the position was open 😭

And the best part? It's automatic cleanup energy, fr fr. The software node gets removed from dev automatically when the test case completes. No manual teardown, no leftovers, no mess. We love a self-cleaning queen 🌈✨

🍓 RETURN 🍓

  • 0 on success 🎉
  • a negative error number on failure 💀

Periodt. That's the whole return contract.

⭐ SEE ALSO ⭐

Go read those if you wanna go deeper, iykyk 🧚💫

ngl bestie, this one's short and sweet — but every single detail is doing its job. Don't sleep on the automatic removal, that's the whole point of the kunit-managed thing 🎀

This page lives in ./lib/kunit, dated October 2026 — same version, same section 9, and we're signing off with a little forehead kiss 😘💖 Go write some tests, bestie, you're gonna slay.

📦 where this page comes from