STRUCT MMU_INTERVAL_NOTIFIER_OPS(9)

💖 NAME 💖

okay so this is the struct mmu_i...notifier_ops(9) page from the Kernel API Manual, and it's literally about struct mmu_interval_notifier_ops — the callback for range notification. no cap, that's the whole NAME vibe. 🫶

✨ SYNOPSIS ✨

here's the struct exactly as it appears, because we do not play with code, periodt:

       struct mmu_interval_notifier_ops {
           bool (*invalidate)(struct mmu_interval_notifier *interval_sub, const
       struct mmu_notifier_range *range, unsigned long cur_seq);
           bool (*invalidate_start)(struct mmu_interval_notifier *interval_sub,
       const struct mmu_notifier_range *range, unsigned long cur_seq, struct
       mmu_interval_notifier_finish **finish);
           void (*invalidate_finish)(struct mmu_interval_notifier_finish
       *finish);
        };

🫶 Members 🫶

• invalidate — okay so when this returns, the caller must stop using any SPTEs within this range. it can sleep, bestie. return false only if sleeping was required but mmu_notifier_range_blockable(range) is false. lowkey crucial. 💅
• invalidate_start — similar to invalidate, but it's for two-pass notifier callbacks, where the call to invalidate_start is the first pass, and any struct mmu_interval_notifier_finish pointer returned in the finish parameter describes the finish pass. if *finish is NULL on return, then no final pass will be called, and invalidate_start needs to implement the full notifier, behaving like invalidate. the value of *finish is guaranteed to be NULL at function entry. very much important. 🎀
• invalidate_finish — called as the second pass for any notifier that returned a non-NULL *finish from invalidate_start. the finish pointer passed here is the same one returned by invalidate_start. iconic. 🦋

🌈 SEE ALSO 🌈

• Kernel file ./include/linux/mmu_notifier.h
• enum mmu_notifier_event(9)
• struct mmu_interval_notifier_finish(9)
• mmu_interval_set_seq(9)
• mmu_interval_read_retry(9)
• mmu_interval_check_retry(9)

okay that's the whole page, byeee bestie 💖 — source: ./include/linux; date: October 2026; page: struct mmu_i...notifier_ops(9); manual: Kernel API Manual.