pte_is_uffd_marker(9)

🎀 NAME 🎀

This is pte_is_uffd_marker(9), bestie, straight outta the Kernel API Manual — and it answers the iconic question: does this PTE entry encode a userfault-specific marker leaf entry? 👀✨

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✨ SYNOPSIS ✨

bool pte_is_uffd_marker (pte_t pte );

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🦋 ARGUMENTS 🦋

• pte — the PTE entry you're checking. That's the whole vibe, no cap. 💅

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💜 DESCRIPTION 💜

okay so real talk: it's useful to be able to determine which leaf entries encode UFFD-specific markers so we can handle these correctly. This function is literally the little bestie that does that vibe check for you. 🫶

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🌈 RETURN 🌈

Returns true if this PTE entry is a UFFD-specific marker, otherwise false. Simple as that, periodt. 💖

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🔥 SEE ALSO 🔥

The kernel file ./include/linux/leafops.h is the main character here, and these functions are all linked in the group chat:

• softleaf_mk_none(9)
• softleaf_from_pte(9)
• softleaf_to_pte(9)
• softleaf_from_pmd(9)
• softleaf_to_pmd(9)
• softleaf_is_none(9)
• softleaf_type(9)
• softleaf_is_swap(9)
• softleaf_is_migration_write(9)
• softleaf_is_migration_read(9)
• softleaf_is_migration_read_exclusive(9)
• softleaf_is_migration(9)
• softleaf_is_device_private_write(9)
• softleaf_is_device_private(9)
• softleaf_is_device_exclusive(9)
• softleaf_is_hwpoison(9)
• softleaf_is_marker(9)
• softleaf_to_marker(9)
• softleaf_has_pfn(9)
• softleaf_to_pfn(9)
• softleaf_to_page(9)
• softleaf_to_folio(9)
• softleaf_is_poison_marker(9)
• softleaf_is_guard_marker(9)
• softleaf_is_uffd_wp_marker(9)
• softleaf_is_migration_young(9)
• softleaf_is_migration_dirty(9)
• pte_is_marker(9)
• pte_is_uffd_wp_marker(9)
• pmd_is_device_private_entry(9)
• pmd_is_migration_entry(9)
• softleaf_is_valid_pmd_entry(9)
• pmd_is_valid_softleaf(9)
• pmd_to_softleaf_folio(9)

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mwah 💋 this page is from the ./include/linux source tree, October 2026 edition, and it's serving full Kernel API Manual realness. bye bestie 🫶✨