kmap_flush_unused(9)

🦋 kmap_flush_unused — bestie, it's time to clean house 🧹✨

Okay so this is a page from the Kernel API Manual, and honestly it's one of those tiny little functions that does exactly what the name says and then dips 💅. No drama, no arguments, no return value — just pure "get the stray mappings out of here" energy. Let's get into it 🫶

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🌸 NAME 🌸

kmap_flush_unused — flush all unused kmap mappings, like, the whole point is to remove stray mappings 🔥

Think of it as the group-chat admin doing a purge of the inactive members. Not personal, just necessary 😌

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✨ SYNOPSIS ✨

void kmap_flush_unused (void );

That's it. That's the whole call. No parameters to remember, no return value to check — iconic, low-maintenance, zero-notes behaviour 👑

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🎀 ARGUMENTS 🎀

• void — no arguments. Not "optional", not "depends on the config" — genuinely, truly, no arguments 🙈

The way this function asks for absolutely nothing from you and still handles its business? Main character energy fr fr 💜

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💖 SEE ALSO 💖

The kernel file lives right here: ./include/linux/highmem.h — that's your home base for all of these, go say hi 🌈

• kmap(9)
• kunmap(9)
• kmap_to_page(9)
• kmap_local_page(9)
• kmap_local_folio(9)
• kmap_atomic(9)
• clear_user_page(9)
• clear_user_pages(9)
• clear_user_highpage(9)
• clear_user_highpages(9)
• vma_alloc_zeroed_movable_folio(9)
• memcpy_from_folio(9)
• memcpy_to_folio(9)
• folio_zero_tail(9)
• folio_fill_tail(9)
• memcpy_from_file_folio(9)
• folio_zero_segments(9)
• folio_zero_segment(9)
• folio_zero_range(9)
• folio_release_kmap(9)

Like, the whole highmem friend group is here — go read them all, iykyk 💀📚

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⭐ Reminder bestie: unused mappings don't flush themselves. Stray stuff lingering = no cap, that's the whole reason this exists 🫶

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Okay that's the whole page, mwah 💋 — brought to you by the source tree at ./include/linux, dated October 2026, from your favourite manual, the Kernel API Manual. Slay, bye 👋✨