@@ -409,14 +409,14 @@ where
409409 let end_inclusive_copy_address = cmp:: min ( end_inclusive_addr, page_end_inclusive) ;
410410
411411 // These are the offsets into the frame we want to copy from.
412- let start_offset_in_frame = ( start_copy_address - page_start) as usize ;
413- let end_inclusive_offset_in_frame = ( end_inclusive_copy_address - page_start) as usize ;
412+ let start_offset_in_frame = start_copy_address - page_start;
413+ let end_inclusive_offset_in_frame = end_inclusive_copy_address - page_start;
414414
415415 // Calculate how many bytes we want to copy from this frame.
416416 let copy_len = end_inclusive_offset_in_frame - start_offset_in_frame + 1 ;
417417
418418 // Calculate the physical addresses.
419- let start_phys_addr = phys_addr. start_address ( ) + start_offset_in_frameas u64 ;
419+ let start_phys_addr = phys_addr. start_address ( ) + start_offset_in_frame;
420420
421421 // These are the offsets from the start address. These correspond
422422 // to the destination indices in `buf`.
@@ -429,11 +429,11 @@ where
429429 // SAFETY: We know that this memory is valid because we got it
430430 // as a result from a translation. There are not other
431431 // references to it.
432- & mut * core:: ptr:: slice_from_raw_parts_mut ( dest_ptr, copy_len)
432+ & mut * core:: ptr:: slice_from_raw_parts_mut ( dest_ptr, copy_lenas usize )
433433 } ;
434434
435435 // Calculate the destination pointer.
436- let src = & buf[ start_offset_in_buf..] [ ..copy_len] ;
436+ let src = & buf[ start_offset_in_buf..] [ ..copy_lenas usize ] ;
437437
438438 // Do the actual copy.
439439 dest. copy_from_slice ( src) ;
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