fwnode_is_ancestor_of(9)

📦 version 7.3.1, in nixpkgs unstable

💅 fwnode_is_ancestor_of ✨

okay so this is a page from the Kernel API Manual and it's literally the vibes check for firmware nodes — like, is this one your ancestor or not? bestie, it's a one-function bop and we're gonna read it together 🫶

🌸 NAME 🌸

fwnode_is_ancestor_of — test if @ancestor is ancestor of @child

🎀 SYNOPSIS 🎀

bool fwnode_is_ancestor_of (const struct fwnode_handle *ancestor , const
       struct fwnode_handle *child );

🦋 ARGUMENTS 🦋

  • ancestor — the firmware we're testing to see if it's the ancestor 👑 (the one we're checking for ancestor-ness)
  • child — the firmware we're testing to see if it's the child 🍓 (the one we're checking as the possible descendant)

💖 DESCRIPTION 💖

So the way this works: a node counts as an ancestor of itself too. yes, literally self-ancestor, main character energy, it contains itself 🙈 no cap.

⭐ RETURN ⭐

You get true if ancestor is an ancestor of child. Otherwise? false. simple as that, periodt 💅

🌈 SEE ALSO 🌈

Kernel file ./drivers/base/core.c — go read these, they're all in the same friend group:

ok that's the whole page, nothing skipped, you're welcome 💜

and that's a wrap bestie!! this one lives in ./drivers/base and it's dated October 2026 — so like, keep it in the group chat, mwah 🎀✨💅

📦 where this page comes from