ttm_tt_setup_backup(9)

💅 ttm_tt_setup_backup(9) — Kernel API Manual ✨

okay so bestie, welcome to the ttm_tt_setup_backup page, straight out of the Kernel API Manual. yes, we're doing kernel graphics TTM stuff today and honestly? iconic. 🎀

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🌸 NAME 🌸

ttm_tt_setup_backup — allocate and assign a backup structure for a ttm_tt 🦋

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✨ SYNOPSIS ✨

int ttm_tt_setup_backup (struct ttm_tt *tt );

like, that's the whole vibe. one function, one pointer, one int coming back at you. 💖

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🫶 ARGUMENTS 🫶

• tt — the ttm_tt for wich to allocate and assign a backup structure. yes bestie, that's the actual spelling in the docs, we don't gatekeep, we don't fix it, we just report it. 💀 (it's giving "the ttm_tt where the backup struct is gonna live" — that's the whole thing. 👑)

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💜 DESCRIPTION 💜

so what this does is assign a backup structure to be used for tt backup. literally that's it, that's the job. 🌈

and the way it's supposed to be used? typically done at bo creation, so you don't get caught doing allocations at shrinking time. no cap, that's the entire strategy: do the allocate-y thing early, so the shrink-y thing later doesn't have to. lowkey genius. 🧚

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⭐ RETURN ⭐

0 on success, and a negative error code on failure. 🙈 that's the whole contract, bestie — check your return value, it's not decorative. 💅

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🦋 SEE ALSO 🦋

kernel file ./drivers/gpu/drm/ttm/ttm_tt.c, plus these absolute main characters:

• ttm_tt_backup(9)
• ttm_tt_swapout(9)
• ttm_kmap_iter_tt_init(9)

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fr fr, go read those three next, they're the friends of this function and iykyk. 🍓

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and that's the page!! 💖 big sign-off energy: this one lives in ./drivers/gpu/drm/ttm, the date on it says October 2026, and the whole thing is filed under ttm_tt_setup_backup(9) — slay, periodt. 🌟