STRUCT KHO_RADIX_WALK_CB(9)

💖 struct kho_radix_walk_cb(9) — Kernel API Manual ✨

Okay so bestie, this is the Kernel API Manual page for struct kho_radix_walk_cb(9) — aka the callback duo for the KHO radix tree walk. It's giving “tiny struct, very important walk energy,” and we’re gonna get through it together. 🫶

🌸 NAME 🌸

struct kho_radix_walk_cb — callbacks for KHO radix tree walk. Lowkey the whole personality of this struct is “hey walk, call me when you hit stuff.” 💅

✨ SYNOPSIS ✨

       struct kho_radix_walk_cb {
           int (*leaf)(unsigned long key, void *data);
           int (*node)(phys_addr_t phys, void *data);
        };

🧚 Members 🧚

• leaf — called on each present key in the radix tree. If the key is actually there, it gets a callback visit. No cap. 🍓
• node — called on each node of the radix tree itself. It receives the physical address of the page containing the node. So it’s handing you phys, plus the data vibe. 🦋

🌈 Description 🌈

For each callback, the return-value rules are simple and honestly iconic:

• return 0 → the walk continues ✅
• return a non-zero value → that value is directly returned to the caller 🚨

That’s the whole vibe check. No extra behavior invented, bestie — just those two rules. periodt. ✨

👑 SEE ALSO 👑

• Kernel file ./include/linux/kho_radix_tree.h
• Kexec Handover Radix Tree(9)

Cute lil sign-off: source/version line is ./include/linux, the date stamp is October 2026, and the star of the show is struct kho_radix_walk_cb(9). Obsessed with this callback representation, fr fr. 💜🎀