softleaf_from_pte(9)

💅 softleaf_from_pte(9) — like, the leaf-entry glow-up of a PTE ✨

okay so bestie, welcome to the Kernel API Manual (section 9, we're in kernel-land now 🧚). This is the page for softleaf_from_pte, and it's genuinely such a small little function but it does exactly one job and it does it iconically. Let's get into it 🫶

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🌸 NAME 🌸

softleaf_from_pte — obtain a leaf entry from a PTE entry. That's it. That's the whole personality. 💖

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✨ SYNOPSIS ✨

softleaf_t softleaf_from_pte (pte_t pte );

Not me writing out the exact signature with the exact spacing because we do not freestyle the synopsis, periodt. 💅

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🎀 ARGUMENTS 🎀

• pte — a PTE entry. yes, that's the whole description, it's giving "minimalist main character energy" but it's also accurate so we move. 🌈

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💜 DESCRIPTION 💜

okay here's the vibe check on what this function actually does, and it's lowkey the plot twist of the page:

if pte is present (and therefore not a leaf entry — read that twice, bestie, because it's the whole point 😭) the function returns an empty leaf entry. Otherwise, it returns a leaf entry.

yeah. the branch is flipped from what your brain expects, and honestly? we respect it. it ate. 🔥

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⭐ RETURN ⭐

a leaf entry. that's the return value. short and slay. 👑

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🦋 SEE ALSO 🦋

okay this is the part where the manpage absolutely unloads the whole friend group on you — 34 references, no cap, and we are listing every single one because they're all part of the lore. the kernel file to know is ./include/linux/leafops.h 💖

• softleaf_mk_none(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)
• pte_is_uffd_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)

like I said. the whole group chat. go say hi to all of them. 👋

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lowkey reminder bestie: the description says present → empty leaf entry, otherwise a leaf entry. don't invert it in your head and then blame the manpage, iykyk 🙈

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and that's the page!! this one lives in ./include/linux and it's dated October 2026, so when you see softleaf_from_pte(9) with that October 2026 timestamp just know it's the same iconic little function we just talked about 💅✨ bye bestie, go read leafops.h 🎀