138         let vaddr = unsafe { alloc_zeroed(layout) };  in dma_alloc()  localVariable
139         let vaddr =  in dma_alloc()  localVariable
140             if let Some(vaddr) = NonNull::new(vaddr) { vaddr } else { handle_alloc_error(layout) };  in dma_alloc()
141         let paddr = virt_to_phys(vaddr);  in dma_alloc()
142         (paddr, vaddr)  in dma_alloc()
145     unsafe fn dma_dealloc(paddr: PhysAddr, vaddr: NonNull<u8>, pages: usize) -> i32 {  in dma_dealloc()
151             dealloc(vaddr.as_ptr(), layout);  in dma_dealloc()
166         let vaddr = buffer.cast();  in share()  localVariable
168         virt_to_phys(vaddr)  in share()
177 fn virt_to_phys(vaddr: NonNull<u8>) -> PhysAddr {  in virt_to_phys()
178     vaddr.as_ptr() as _  in virt_to_phys()