ttm_bo_kunmap(9)

💅 ttm_bo_kunmap(9) — Kernel API Manual, bestie edition ✨

okay so this is ttm_bo_kunmap, from the Kernel API Manual — yes the section (9) one, the kernel-internals section, we love a niche queen 🎀

✨ NAME ✨

ttm_bo_kunmap — and ngl, upstream literally left the description blank after the dash 🙈 so what you see is what you get, no cap. The name is the whole name.

🌸 SYNOPSIS 🌸

void ttm_bo_kunmap (struct ttm_bo_kmap_obj *map );

that's it. that's the whole thing. short and iconic 💅

🦋 ARGUMENTS 🦋

• map — the object describing the map you wanna unmap. like, the receipt for the mapping. hand it back 🫶

💖 DESCRIPTION 💖

So bestie, real talk: this undoes a kernel map that was set up by ttm_bo_kmap. That's the whole job. kmap gives you a kernel map, kunmap takes it away — they're giving matched set energy, main character and their plus-one 😭✨

it's void, so it doesn't hand you back an error code or anything, it just does the thing. periodt.

🔥 SEE ALSO 🔥

literally the whole friend group, go say hi 👑

• ttm_move_memcpy(9)
• ttm_bo_move_memcpy(9)
• ttm_buffer_object_transfer(9)
• ttm_io_prot(9)
• ttm_bo_kmap_try_from_panic(9)
• ttm_bo_kmap(9)
• ttm_bo_vmap(9)
• ttm_bo_vunmap(9)
• ttm_bo_move_accel_cleanup(9)
• ttm_bo_move_sync_cleanup(9)
• ttm_bo_pipeline_gutting(9)
• ttm_lru_walk_for_evict(9)
• ttm_bo_lru_cursor_fini(9)
• ttm_bo_lru_cursor_init(9)
• ttm_bo_lru_cursor_next(9)
• ttm_bo_lru_cursor_first(9)
• ttm_bo_shrink(9)
• ttm_bo_shrink_suitable(9)
• ttm_bo_shrink_avoid_wait(9)

and if you wanna read the actual source (iconic behaviour honestly), it lives in the kernel file ./drivers/gpu/drm/ttm/ttm_bo_util.c 🧚

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lowkey the whole point: mapped it? unmapped it. balance restored 🌈

k byeeee, this page was brought to you by the fine folks at ./drivers/gpu/drm/ttm, dated October 2026, and it's ttm_bo_kunmap(9) signing off — mwah 💜🍓