ptdesc_clear_kernel(9)

💅 ptdesc_clear_kernel(9) 💅

Welcome to the Kernel API Manual, bestie — we're doing kernel cleanup and we're doing it cute. 🫶

✨ NAME ✨

ptdesc_clear_kernel — mark a ptdesc as no longer used to map the kernel. That's the whole mission, no cap. 💖

🌟 SYNOPSIS 🌟

void ptdesc_clear_kernel (struct ptdesc *ptdesc );

🎀 ARGUMENTS 🎀

• ptdesc — the ptdesc to be unmarked. Yep, that's the one getting the "no longer used to map the kernel" treatment ✨.

💖 DESCRIPTION 💖

Use this when the ptdesc is no longer used to map the kernel and no longer needs special handling. It's giving "we're done here, thank u next" energy, but make it kernel cleanup. Lowkey iconic. That's literally the job — no extra lore needed. 💀

🔥 SEE ALSO 🔥

Kernel file ./include/linux/mm.h is the home base, and here's the whole friend group, fr fr:

• folio_page_idx(9)
• vma_flag_t(9)
• fault_flag_allow_retry_first(9)
• vma_kernel_pagesize(9)
• folio_order(9)
• folio_reset_order(9)
• folio_mapcount(9)
• folio_mapped(9)
• thp_order(9)
• thp_size(9)
• folio_get(9)
• folio_put(9)
• folio_put_refs(9)
• folios_put(9)
• vma_flags_is_cow_mapping(9)
• vma_is_cow_mapping(9)
• vma_desc_is_cow_mapping(9)
• folio_pfn(9)
• folio_mk_pte(9)
• folio_mk_pmd(9)
• folio_mk_pud(9)
• folio_maybe_dma_pinned(9)
• is_zero_page(9)
• is_zero_folio(9)
• folio_nr_pages(9)
• folio_next(9)
• folio_shift(9)
• folio_size(9)
• folio_maybe_mapped_shared(9)
• folio_expected_ref_count(9)
• zap_vma(9)
• ptdesc_address(9)
• ptdesc_set_kernel(9)
• ptdesc_test_kernel(9)
• pagetable_alloc(9)
• pagetable_free(9)
• vma_lookup(9)
• vma_start_pgoff(9)
• vma_end_pgoff(9)
• vma_last_pgoff(9)
• vma_start_anon_pgoff(9)
• vma_end_anon_pgoff(9)
• vma_last_anon_pgoff(9)
• mmap_action_remap(9)
• mmap_action_remap_full(9)
• mmap_action_ioremap(9)
• mmap_action_ioremap_full(9)
• mmap_action_simple_ioremap(9)
• mmap_action_map_kernel_pages(9)
• mmap_action_map_kernel_pages_full(9)
• range_is_subset(9)
• range_in_vma(9)
• range_in_vma_desc(9)
• clear_pages(9)

That's the page, bestie 💋 — source/version: ./include/linux; date: October 2026. Go mark that ptdesc and slay the cleanup era 🌈🦋.