drm_pagemap_put(9)

💅 drm_pagemap_put(9) ✨

okay so bestie, we're in the Kernel API Manual today and this one is short but it matters — it's the polite little goodbye function for pagemap references. Let's get into it 🫶

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🌸 NAME 🌸

drm_pagemap_put — put a struct drm_pagemap reference (yes, it's literally the "drop the ref" moment, and yes, you need it)

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⭐ SYNOPSIS ⭐

void drm_pagemap_put (struct drm_pagemap *dpagemap );

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🎀 ARGUMENTS 🎀

• dpagemap — a pointer to a struct drm_pagemap object. that's the vibe. that's the whole argument list. 💖

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🦋 DESCRIPTION 🦋

so what it does: it puts a struct drm_pagemap reference — meaning it drops one refcount — and if that refcount hits zero, the drm_pagemap object gets freed. no cap. last one out turns off the lights 🔥

lowkey important: this is the release-side counterpart to grabbing a reference, so don't just call it for fun or you'll be freeing things that still have friends 😭

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💜 SEE ALSO 💜

the whole friend group, bestie — go read these too:

• Kernel file ./drivers/gpu/drm/drm_pagemap.c Overview(9)
• Migration(9)
• struct drm_pagemap_zdd(9)
• drm_pagemap_zdd_alloc(9)
• drm_pagemap_zdd_get(9)
• drm_pagemap_zdd_destroy(9)
• drm_pagemap_zdd_put(9)
• drm_pagemap_migration_unlock_put_folio(9)
• drm_pagemap_migration_unlock_put_pages(9)
• drm_pagemap_get_devmem_page(9)
• drm_pagemap_migrate_map_device_private_pages(9)
• struct drm_pagemap_iova_state(9)
• drm_pagemap_migrate_map_system_pages(9)
• drm_pagemap_migrate_populate_src_pages(9)
• drm_pagemap_migrate_unmap_pages(9)
• struct migrate_range_loc(9)
• drm_pagemap_cpages(9)
• drm_pagemap_migrate_to_devmem(9)
• drm_pagemap_migrate_populate_ram_pfn(9)
• struct drm_pagemap_dev_hold(9)
• drm_pagemap_reinit(9)
• drm_pagemap_init(9)
• drm_pagemap_page_get_flags(9)
• drm_pagemap_page_set_flags(9)
• drm_pagemap_retire_migrated_pages(9)
• drm_pagemap_skip_retired_pages(9)
• drm_pagemap_evict_to_ram(9)
• __drm_pagemap_migrate_to_ram(9)
• drm_pagemap_folio_free(9)
• drm_pagemap_migrate_to_ram(9)
• drm_pagemap_pagemap_ops_get(9)
• drm_pagemap_devmem_init(9)
• drm_pagemap_page_to_dpagemap(9)
• drm_pagemap_populate_mm(9)

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and that's the page, bestie!! this one lives at ./drivers/gpu/drm and it's dated October 2026 — so like, future iconic behavior 💅✨ go forth and put your refs responsibly, ily 🧚💖