css_rightmost_descendant(9)

📦 version 7.3.1, in nixpkgs unstable

okay bestie, welcome to the css_rightmost_descendant(9) page from the Kernel API Manual — yes, we're deep in cgroup css territory and it's honestly kinda iconic 🎀✨

🌸 NAME 🌸

css_rightmost_descendant — return the rightmost descendant of a css 💅

✨ SYNOPSIS ✨

struct cgroup_subsys_state * css_rightmost_descendant (struct
       cgroup_subsys_state *pos );

🎀 ARGUMENTS 🎀

  • pos — css of interest. that's the one you're asking about, bestie 👀

🦋 DESCRIPTION 🦋

Return the rightmost descendant of pos. If there's no descendant, pos is returned. This can be used during pre-order traversal to skip subtree of pos. no cap, that's the whole move 🌿

🚨 locking vibe check: while this function requires cgroup_mutex or RCU read locking, it doesn't require the whole traversal to be contained in a single critical section. Additionally, it isn't necessary to hold onto a reference to pos. This function will return the correct rightmost descendant as long as pos is accessible. periodt 💅

👑 SEE ALSO 👑

the page also points at Kernel file ./kernel/cgroup/cgroup.c, and then this exact lineup of refs, bestie 👇

okay that's literally the whole page, bestie! 💖 this one is sourced from ./kernel/cgroup, dated October 2026, and the page is css_rightmost_descendant(9). byeee 🫶✨

📦 where this page comes from