unmap_entry(9)

💅 unmap_entry — the kernel API manual, but make it make sense

okay so bestie, welcome to unmap_entry(9), the manual page for the little function that unmaps an invalid entry and tells everyone its page needs to be written out. yep, that's the whole vibe. she's a Kernel API Manual girly through and through ✨

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🎀 NAME 🎀

unmap_entry — unmaps an invalid entry, and like, indicates that its page must be written out. that's it, that's the job 💅

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🌸 SYNOPSIS 🌸

void unmap_entry (struct block_map_page *page , struct vdo_completion *completion , slot_number_t slot );

copy it exactly, spacing and all, no cap — we do not editorialize code here 💖

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🦋 ARGUMENTS 🦋

• page — the page that's holding the entries. she's the container, the stage, the main character of the address space 🫶
• completion — the page_completion used for writing the page. think of it as the little receipt you get when the write goes through ✨
• slot — the slot you're unmapping. yeet that entry, bestie 🙈

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🌈 SEE ALSO 🌈

so there's a whole friend group here, and we are not leaving anyone out of the group chat. Kernel file ./drivers/md/dm-vdo/repair.c plus literally all of these:

• as_repair_completion(9)
• abort_repair(9)
• abort_on_error(9)
• drain_slab_depot(9)
• flush_block_map_updates(9)
• handle_page_load_error(9)
• remove_out_of_bounds_entries(9)
• process_slot(9)
• rebuild_reference_counts_from_page(9)
• page_loaded(9)
• fetch_page(9)
• rebuild_from_leaves(9)
• process_entry(9)
• advance_points(9)
• before_recovery_point(9)
• get_entry(9)
• validate_recovery_journal_entry(9)
• add_slab_journal_entries(9)
• vdo_replay_into_slab_journals(9)
• find_entry_starting_next_page(9)
• get_recovery_journal_block_header(9)
• is_valid_recovery_journal_block(9)
• is_exact_recovery_journal_block(9)
• find_recovery_journal_head_and_tail(9)
• unpack_entry(9)
• append_sector_entries(9)
• extract_new_mappings(9)
• compute_usages(9)
• vdo_repair(9)

like, that's the whole squad. no one gets left on read 🔥

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okay that's the page!! this one's courtesy of ./drivers/md/dm-vdo, dated October 2026, and it's unmap_entry(9) signing off — stay hydrated, unmapped, and iconic 👑💜