remap_vmalloc_range(9)

💖 remap_vmalloc_range(9) 💖

okay bestie, welcome to the Kernel API Manual page for remap_vmalloc_range(9) — it's giving “map vmalloc pages to userspace” and it's lowkey iconic. no cap, let's get into it 🫶✨

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💖 NAME 💖

remap_vmalloc_range — map vmalloc pages to userspace 🌈

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✨ SYNOPSIS ✨

int remap_vmalloc_range (struct vm_area_struct *vma , void *addr ,
       unsigned long pgoff );

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🎀 ARGUMENTS 🎀

• vma — the vma to cover, bestie: map the full range of vma. 💅
• addr — vmalloc memory. literally the memory in question.
• pgoff — number of pages into addr before the first page to map. yes, that's the offset vibe.

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🌸 RETURN 🌸

0 for success, -Exxx on failure. that's it, that's the whole return section 🎀

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🦋 DESCRIPTION 🦋

okay so this function checks that addr is a valid vmalloc'ed area, and that it is big enough to cover the vma. Will return failure if that criteria isn't met. periodt.

Similar to remap_pfn_range (see mm/memory.c). 👑

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🔥 SEE ALSO 🔥

Kernel file ./mm/vmalloc.c — and here's the whole friend group, bestie:

• 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)
• vmap_pfn(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)
• pvm_find_va_enclose_addr(9)
• pvm_determine_end_from_reverse(9)
• pcpu_get_vm_areas(9)
• pcpu_free_vm_areas(9)

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xoxo, bestie — this page's source/version is ./mm, dated October 2026 💅✨