vmap_pfn(9)

🦋 vmap_pfn(9) 🦋

okay bestie, this page is straight out of the Kernel API Manual, and it’s giving “map an array of PFNs into virtually contiguous space” energy ✨

🌸 NAME 🌸

vmap_pfn — map an array of PFNs into virtually contiguous space 💅

✨ SYNOPSIS ✨

void * vmap_pfn (unsigned long *pfns , unsigned int count , pgprot_t
       prot );

🎀 ARGUMENTS 🎀

• pfns — array of PFNs
• count — number of pages to map
• prot — page protection for the mapping

💖 DESCRIPTION 💖

okay so here’s the tea: vmap_pfn() maps count PFNs from pfns into contiguous kernel virtual space, and returns the start address of the mapping. slay. 🫶

🌈 SEE ALSO 🌈

Kernel file ./mm/vmalloc.c — and the whole SEE ALSO friend group is literally right here:

• vunmap_range(9)
• vmap_pages_range(9)
• vm_area_map_pages(9)
• vm_area_unmap_pages(9)
• new_vmap_block(9)
• vm_unmap_aliases(9)
• vm_unmap_ram(9)
• vm_map_ram(9)
• vm_area_add_early(9)
• vm_area_register_early(9)
• get_vm_area(9)
• find_vm_area(9)
• remove_vm_area(9)
• vfree_atomic(9)
• vfree(9)
• vunmap(9)
• vmap(9)
• __vmalloc_node_range(9)
• __vmalloc_node(9)
• vmalloc(9)
• vmalloc_huge_node(9)
• vzalloc(9)
• vmalloc_user(9)
• vmalloc_node(9)
• vzalloc_node(9)
• vrealloc_node_align(9)
• vmalloc_32(9)
• vmalloc_32_user(9)
• vread_iter(9)
• remap_vmalloc_range_partial(9)
• remap_vmalloc_range(9)
• pvm_find_va_enclose_addr(9)
• pvm_determine_end_from_reverse(9)
• pcpu_get_vm_areas(9)
• pcpu_free_vm_areas(9)

and that’s the page, bestie! 💅 source/version ./mm, dated October 2026, serving vmap_pfn(9) energy — periodt. 🦋