for_each_zo...ist_nodemask(9)

for_each_zone_zonelist_nodemask(9) 💅

okay bestie, this is the for_each_zone_zonelist_nodemask(9) page from the Kernel API Manual ✨ it's a helper macro with serious main character energy, and no cap, it does exactly one job.

💖 NAME 💖

for_each_zone_zonelist_nodemask — helper macro to iterate over valid zones in a zonelist at or below a given zone index and within a nodemask 🦋

✨ SYNOPSIS ✨

for_each_zone_zonelist_nodemask (zone , z , zlist , highidx , nodemask );

🎀 ARGUMENTS 🎀

• zone — the current zone in the iterator 💖
• z — the current pointer within zonelist->_zonerefs being iterated 🌸
• zlist — the zonelist being iterated 🦋
• highidx — the zone index of the highest zone to return ⭐
• nodemask — Nodemask allowed by the allocator 👑

💅 DESCRIPTION 💅

this iterator loops through all zones at or below a given zone index and within a given nodemask. periodt. that's the whole plot, bestie — no extra lore, fr fr 😌

🌈 SEE ALSO 🌈

kernel file ./include/linux/mmzone.h — see also this whole friend group:

• is_highmem(9)
• for_each_online_pgdat(9)
• for_each_zone(9)
• next_zones_zonelist(9)
• first_zones_zonelist(9)
• for_each_zone_zonelist(9)
• pfn_valid(9)

that's the vibe check, bestie — from ./include/linux, October 2026, for_each_zo...ist_nodemask(9) 💖🎀