pmd_bad(9)

🌸 pmd_bad(9) — from the Kernel API Manual, bestie 🌸

okay so real talk, this one is a page from the Kernel API Manual and it's honestly giving "we don't know her" energy and I am obsessed 😭

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✨ NAME ✨

pmd_bad — checks if a PMD entry is "bad" 👀

and like… "bad" might mean swapped out? maybe? but honestly we have no known cause of badness, so it's null, exactly like it is for many architectures. the mystery, the intrigue, the absolute lack of answers 💅

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🎀 SYNOPSIS 🎀

int pmd_bad (pmd_t pmd );

like, that's the whole thing. she's short, she's sweet, she's int 🫶

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🦋 ARGUMENTS 🦋

• pmd — -- undescribed -- 💀

yes bestie, the original literally says undescribed. the docs said "not today". no cap, that's canon 🙈

ngl this is the most iconically unhelpful argument description in the whole kernel and I respect it fr fr

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🌈 SEE ALSO 🌈

• Kernel file ./arch/hexagon/include/asm/pgtable.h 📁 — that's where the magic (and the mystery) lives
• pmd_none(9)
• pmd_present(9)
• pte_none(9)

iykyk, go read those siblings too, they're the main character energy of this friend group 👑

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okay that's the whole page, she's little but she's iconic ✨

this cutie lives in ./arch/hexagon/include/asm, dated October 2026, and signs off as pmd_bad(9) — mwah, love u, go check your page tables 💖🎀🦋