for_each_res...d_mem_region(9)

🌸 for_each_reserved_mem_region(9) 🌸

ok so real talk, bestie — this is a page from the Kernel API Manual, and the full name got chopped in the header (for_each_res...d_mem_region(9), screaming 😭), but the actual macro is for_each_reserved_mem_region and she is literally the icon of reserved memory. Let's get into it 🫶

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✨ NAME ✨

for_each_reserved_mem_region — iterate over reserved memory regions 💅

like, it's giving "for each reserved memory region, do the thing." main character loop energy, no cap.

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🦋 SYNOPSIS 🦋

for_each_reserved_mem_region (region );

that's it. that's the whole vibe. one argument, in and out 🌈

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🎀 ARGUMENTS 🎀

• region — the loop variable, bestie! it's the little guy that gets handed each reserved memory region as the loop goes around. iykyk 💖

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⭐ SEE ALSO ⭐

ok this is the part where the manpage name-drops literally everyone in the friend group. all of these live in the kernel file ./include/linux/memblock.h:

• enum memblock_flags(9)
• struct memblock_region(9)
• struct memblock_type(9)
• struct memblock(9)
• for_each_physmem_range(9)
• __for_each_mem_range(9)
• __for_each_mem_range_rev(9)
• for_each_mem_range(9)
• for_each_mem_range_rev(9)
• for_each_reserved_mem_range(9)
• for_each_mem_pfn_range(9)
• for_each_free_mem_range(9)
• for_each_free_mem_range_reverse(9)
• memblock_set_current_limit(9)
• memblock_region_memory_base_pfn(9)
• memblock_region_memory_end_pfn(9)
• memblock_region_reserved_base_pfn(9)
• memblock_region_reserved_end_pfn(9)
• for_each_mem_region(9)

note that the whole squad is listed above — don't come for me if you wanted a shorter list, the original said all of them and we keep all of them 🔥

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and that's the page, diva 💜 huge thank you to ./include/linux for hosting, and a very happy October 2026 to you all — this has been for_each_res...d_mem_region(9), signing off 🎀✨🌸