kmap_high(9)

🦋 kmap_high — Kernel API Manual 🦋

okay bestie, we're in the kmap_high(9) page and it's giving "tiny but important kernel helper" energy. let's get into it 💅

✨ NAME ✨

kmap_high — map a highmem page into memory.

🌸 SYNOPSIS 🌸

void * kmap_high (struct page *page );

🎀 ARGUMENTS 🎀

• page — the struct page to map. that's the whole argument, no secret extra params 👑

💖 DESCRIPTION 💖

Returns the page's virtual memory address. literally its whole job, and it ate.

We cannot call this from interrupts, as it may block. so yeah, no calling it from interrupts — this is the "may block" situation, bestie, respect the vibe check 😭

🌈 SEE ALSO 🌈

• Kernel file ./mm/highmem.c — the source file, plus the whole linked-up friend group: kmap_high_get(9), kunmap_high(9), page_address(9), and set_page_address(9). iykyk 💜

okay that's the page, mwah 💋 — brought to you from ./mm, dated October 2026, and filed under kmap_high(9). periodt. 🫶