static int filter_mmap(struct file *filp, struct vm_area_struct *vma) { vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); vma->vm_pgoff = ( (u32)map_start >> PAGE_SHIFT); if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, vma->vm_end-vma->vm_start, vma->vm_page_prot)) return -EAGAIN; return 0; } |
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