> +void *vm_map_folio(struct folio *folio)
> +{
> + size_t size = folio_size(folio);
> + void *mem = vmap_alloc(size, NUMA_NO_NODE);
Needs an error check here.
> + mem = kasan_unpoison_vmalloc(mem, size, KASAN_VMALLOC_PROT_NORMAL);
> +
> + return mem;
Why not:
return kasan_unpoison_vmalloc(mem, size, KASAN_VMALLOC_PROT_NORMAL);
> +EXPORT_SYMBOL(vm_map_folio);
All new vmalloc/vmap functionality should be EXPORT_SYMBOL_GPL.
