drm_pagemap_cpages(9)

💖 drm_pagemap_cpages(9) 💖

okay bestie, welcome to the Kernel API Manual page for drm_pagemap_cpages(9). The title is drm_pagemap_cpages, the manual name is Kernel API Manual, and the whole assignment is Count collected pages. No cap. 🎀✨

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🌸 NAME 🌸

drm_pagemap_cpages — Count collected pages. That's the entire name section, bestie: it counts collected pages and it is not trying to be mysterious about it. 💅

🦋 SYNOPSIS 🦋

int drm_pagemap_cpages (unsigned long *migrate_pfn , unsigned long
       npages );

okay so it returns an int, and it takes unsigned long *migrate_pfn plus unsigned long npages. Slay. 💖

🎀 ARGUMENTS 🎀

• migrate_pfn — array of migrate_pfn entries to account. It's giving "here are the entries, pls account for them." 🫶
• npages — number of entries in migrate_pfn. Basically the entry count, bestie. 🦋

🔥 DESCRIPTION 🔥

Compute the total number of minimum-sized pages represented by the collected entries in migrate_pfn. The total is derived from the order encoded in each entry. That's the whole bit — no extra lore, no secret extra parameters. 💅

⭐ RETURN ⭐

Total number of minimum-sized pages. That's what you get back, and it's an int per the synopsis. 👑

💜 SEE ALSO 💜

okay so the related-pages list has main character energy and we are not skipping it. The kernel file is ./drivers/gpu/drm/drm_pagemap.c, and here are all the references:

• 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_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_put(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 footer, bestie: source ./drivers/gpu/drm, date October 2026, and page drm_pagemap_cpages(9) from the Kernel API Manual. bye, go count those collected pages 💖🌈✨