drm_pagemap..._lock_lookup(9)

💖 drm_pagemap..._lock_lookup(9) — the Kernel API Manual glow-up 💖

okay bestie, so this is a page from the Kernel API Manual and the star of the show is drm_pagemap_cache_lock_lookup — yes that's a long name, no we are not shortening it, she's iconic and she's earned every character 🎀

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✨ NAME ✨

drm_pagemap_cache_lock_lookup — locks a drm_pagemap_cache so you can do a lookup. that's it, that's the whole vibe 💅

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🦋 SYNOPSIS 🦋

int drm_pagemap_cache_lock_lookup (struct drm_pagemap_cache *cache );

literally just hand her a cache pointer and she handles the rest 🫶

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🌸 ARGUMENTS 🌸

• cache — the drm_pagemap_cache you wanna lock. that's the one. the main character of this call 💖

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⭐ RETURN ⭐

she's giving very simple receipts, ngl:

• -EINTR — returned if she got interrupted while blocking 😭 (rude, but okay)
• 0 — everything else. we love a clean zero, no cap ✨

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🌈 SEE ALSO 🌈

okay so here's the whole friend group, no one gets left out 🫶

• the kernel file ./drivers/gpu/drm/drm_pagemap_util.c (that's where she lives, home sweet home 🏠)
• struct drm_pagemap_cache(9)
• struct drm_pagemap_shrinker(9)
• drm_pagemap_cache_create_devm(9)
• Cache lookup(9)
• drm_pagemap_cache_unlock_lookup(9) (the one you call after this one, iykyk 🔥)
• drm_pagemap_get_from_cache(9)
• drm_pagemap_cache_set_pagemap(9)
• drm_pagemap_get_from_cache_if_active(9)
• drm_pagemap_shrinker_might_lock(9)
• drm_pagemap_shrinker_add(9)
• drm_pagemap_shrinker_create_devm(9)
• struct drm_pagemap_owner(9)
• drm_pagemap_release_owner(9)
• interconnect_fn(9)
• drm_pagemap_acquire_owner(9)

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bestie note: every single one of those is a real page, go read them, I'm not doing the lore dump for you 💀

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and that's the whole thing!! this page ships out of ./drivers/gpu/drm, stamped October 2026, from the Kernel API Manual — go forth and lock your lookups responsibly 👑💜 🎀