remap_pfn_range (9) Linux Manual Page
remap_pfn_range – remap kernel memory to userspace
Synopsis
int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, unsigned long size, pgprot_t prot);Arguments
vma
-
- user vma to map to
addr
- target user address to start at
pfn
- physical address of kernel memory
size
- size of map area
prot
- page protection flags for this mapping
Note
this is only safe if the mm semaphore is held when called.