Source of nommu.c - linux-imx - PHYTEC BitBucket (Stash)

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        unsigned long, new_addr)
{
    unsigned long ret;
​
    down_write(&current->mm->mmap_sem);
    ret = do_mremap(addr, old_len, new_len, flags, new_addr);
    up_write(&current->mm->mmap_sem);
    return ret;
}
​
struct page *follow_page_mask(struct vm_area_struct *vma,
                  unsigned long address, unsigned int flags,
                  unsigned int *page_mask)
struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
             unsigned int foll_flags)
{
    *page_mask = 0;
    return NULL;
}
​
int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
        unsigned long pfn, unsigned long size, pgprot_t prot)
{
    if (addr != (pfn << PAGE_SHIFT))
        return -EINVAL;
​
    vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;