STRUCT KLP_CALLBACKS(9)

💖 struct klp_callbacks(9)

okay bestie, welcome to the struct klp_callbacks(9) page from the Kernel API Manual ✨ — this is the callback structure for pre/post live-(un)patch, and we're gonna make it make sense, fr fr.

✨ NAME

• struct klp_callbacks — pre/post live-(un)patch callback structure. that's the whole name, iconic and exact 💅

🎀 SYNOPSIS

struct klp_callbacks {
    klp_pre_patch_t pre_patch;
    klp_post_patch_t post_patch;
    klp_pre_unpatch_t pre_unpatch;
    klp_post_unpatch_t post_unpatch;
    bool post_unpatch_enabled;
};

🫶 MEMBERS

• pre_patch — executed before code patching. yep, before the patch moment 👑
• post_patch — executed after code patching. after the patch, bestie 🌸
• pre_unpatch — executed before code unpatching. before the unpatch era 🦋
• post_unpatch — executed after code unpatching. after the unpatch, periodt 💜
• post_unpatch_enabled — flag indicating if post-unpatch callback should run. it's the little bool vibe check for that callback ✅

🌈 DESCRIPTION

okay so all callbacks are optional — every single one. Only the pre-patch callback, if provided, will be unconditionally executed. that's the main character of this struct, no cap.

If the parent klp_object fails to patch for any reason, including a non-zero error status returned from the pre-patch callback, no further callbacks will be executed. like, full stop, bestie 😭

🔥 SEE ALSO

• Kernel file ./tools/include/linux/livepatch_external.h — go read it, iykyk 📖

mwah 💋 source: ./tools/include/linux · date: October 2026 · page: struct klp_callbacks(9) — catch you in the kernel, bestie 🫶