69  * o pbuf can wrap only at a block boundary
101 		 * 2. We cannot wrap except on a block boundary.  in pio_copy()
117 		 * If the wrap comes before or matches the data end,  in pio_copy()
118 		 * copy until until the wrap, then wrap.  in pio_copy()
122 		 * and nothing will get written, but we will wrap in  in pio_copy()
136 		/* write 8-byte non-SOP, non-wrap chunk data */  in pio_copy()
143 	/* at this point we have wrapped if we are going to wrap */  in pio_copy()
156 	 * as we only wrap on a block boundary  in pio_copy()
332 		 * 2. We cannot wrap except on a block boundary.  in seg_pio_copy_start()
348 		 * If the wrap comes before or matches the data end,  in seg_pio_copy_start()
349 		 * copy until until the wrap, then wrap.  in seg_pio_copy_start()
353 		 * and nothing will get written, but we will wrap in  in seg_pio_copy_start()
367 		/* write 8-byte non-SOP, non-wrap chunk data */  in seg_pio_copy_start()
374 	/* at this point we have wrapped if we are going to wrap */  in seg_pio_copy_start()
409 		 * wrap because we are still in the first block and  in mid_copy_mix()
410 		 * can only wrap on block boundaries.  in mid_copy_mix()
439 	 * - at the wrap  in mid_copy_mix()
443 	 * If the wrap comes before or matches the data end,  in mid_copy_mix()
444 	 * copy until until the wrap, then wrap.  in mid_copy_mix()
446 	 * If dest is at the wrap, we will fall into the if,  in mid_copy_mix()
447 	 * not do the loop, when wrap.  in mid_copy_mix()
464 	/* write 8-byte non-SOP, non-wrap chunk data */  in mid_copy_mix()
483 		 * Check for wrap and the possibility the write  in mid_copy_mix()
489 		 * we cannot have wrapped. We do the wrap check first as that  in mid_copy_mix()
535 		 * wrap because we are still in the first block and  in mid_copy_straight()
536 		 * can only wrap on block boundaries.  in mid_copy_straight()
565 	 * - at the wrap  in mid_copy_straight()
569 	 * If the wrap comes before or matches the data end,  in mid_copy_straight()
570 	 * copy until until the wrap, then wrap.  in mid_copy_straight()
572 	 * If dest is at the wrap, we will fall into the if,  in mid_copy_straight()
573 	 * not do the loop, when wrap.  in mid_copy_straight()
590 	/* write 8-byte non-SOP, non-wrap chunk data */  in mid_copy_straight()
663 			 * cannot have wrapped.  We do the wrap check first  in seg_pio_copy_mid()
716 	 * cannot have wrapped.  We do the wrap check first as that is  in seg_pio_copy_end()