vm_area_add_early(9)

💖 vm_area_add_early(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is the page for vm_area_add_early(9), and it is lowkey a “handle with care” situation. 🫶

---

✨ NAME ✨

vm_area_add_early — add vmap area early during boot

🌸 SYNOPSIS 🌸

void vm_area_add_early (struct vm_struct *vm );

🎀 ARGUMENTS 🎀

• vm — the vm_struct to add. That's the whole argument, no cap. 💅

💖 DESCRIPTION 💖

This function is used to add fixed kernel vm area to vmlist before vmalloc_init is called. It's giving “early-boot setup only” energy, fr fr. 🌅

For this to go right, vm->addr, vm->size, and vm->flags should contain proper values, and the other fields should be zero. Like, the struct needs to be dressed correctly before it walks into the function. 🎀

⚠️ DO NOT USE THIS FUNCTION UNLESS YOU KNOW WHAT YOU'RE DOING. ⚠️

That's the manual's own all-caps warning, and we do not soften it. This is not a “just try it and see” moment, bestie. 💀

🦋 SEE ALSO 🦋

Kernel file ./mm/vmalloc.c — and the whole reference squad is:

• 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_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)
• 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)

---

signed off with love from the ./mm source, October 2026 edition — slay, bye! 💅✨