gmap_helper_zap_one_page(9)

💅 gmap_helper_zap_one_page(9) 💅

okay so bestie, welcome to the gmap_helper_zap_one_page(9) page — that's the kernel API manual, and yes it's as niche as it sounds, but we're gonna slay this together 🫶

✨ NAME ✨

gmap_helper_zap_one_page — discard a page if it was swapped.

🌸 SYNOPSIS 🌸

void gmap_helper_zap_one_page (struct mm_struct *mm , unsigned long
vmaddr );

🎀 ARGUMENTS 🎀

• mm — the mm. that's it. that's the whole description. she's mysterious, she's iconic, she's the mm 💅
• vmaddr — the userspace virtual address that needs to be discarded 🔥

🦋 DESCRIPTION 🦋

so here's the vibe check: if the given address maps to a swap entry, discard it. periodt. no cap, that's literally the whole thing ✨

💜 CONTEXT 💜

⚠️ bestie listen — this needs to be called while holding the mmap lock. not optional. do not skip this. fr fr 🙈

🌈 SEE ALSO 🌈

• Kernel file ./arch/s390/mm/gmap_helpers.c try_get_locked_pte(9)
• gmap_helper_discard(9)
• gmap_helper_try_set_pte_unused(9)
• gmap_helper_disable_cow_sharing(9)

go read those too, they're giving main character energy too 👑

and that's the whole page!! mwah 💋 this came to you from ./arch/s390/mm, dated October 2026, and it's gmap_helper_zap_one_page(9) out 💖 🎀 🦋 🌸