STRUCT PENDING_FREE(9)

💖 NAME 💖

struct pending_free(9) — straight from the Kernel API Manual — is literally all about information about data structures about to be freed. That's the whole vibe bestie: the bookkeeping for stuff that's about to get yeeted. ✨

🦋 SYNOPSIS 🦋

       struct pending_free {
           struct list_head zapped;
           unsigned long lock_chains_being_freed[BITS_TO_LONGS(
       MAX_LOCKDEP_CHAINS)];
        };

🎀 Members 🎀

• zapped — head of a list with struct lock_class elements. It's giving "these are the things in line," and honestly, same. 💅
• lock_chains_being_freed — a bitmap that indicates which lock_chains[] elements are about to be freed. No cap, it's literally tracking the soon-to-be-freed lock chains. 🫶

🌈 SEE ALSO 🌈

• Kernel file ./kernel/locking/lockdep.c
• struct delayed_free(9)
• struct lock_trace(9)
• lockdep_hardirqs_on_prepare(9)
• lockdep_cleanup_dead_cpu(9)

Bestie, if you're poking around these parts, these are the little sibling pages to check next. 👑

Cute sign-off: source/version is ./kernel/locking, dated October 2026 — mwah, go read the kernel, ily. 💖🎀🦋