参照元†
- struct vm_area_struct *vma
- struct vm_fault *vmf
返り値†
static int ion_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct ion_buffer *buffer = vma->vm_private_data;
unsigned long pfn;
int ret;
mutex_lock(&buffer->lock);
ion_buffer_page_dirty(buffer->pages + vmf->pgoff);
BUG_ON(!buffer->pages || !buffer->pages[vmf->pgoff]);
pfn = page_to_pfn(ion_buffer_page(buffer->pages[vmf->pgoff]));
ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn);
mutex_unlock(&buffer->lock);
if (ret)
return VM_FAULT_ERROR;
return VM_FAULT_NOPAGE;
}
コメント†
![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
