93  * by using the gang ABD type (abd_alloc_gang()). This allows for multiple ABDs
265 		 * is being added to another gang ABD we will set the link  in abd_free_gang()
266 		 * as inactive when removing it from this gang ABD and before  in abd_free_gang()
267 		 * adding it to the other gang ABD.  in abd_free_gang()
347  * Create gang ABD that will be the head of a list of ABD's. This is used
362  * Add a child gang ABD to a parent gang ABDs chained list.
372 		 * If the parent is responsible for freeing the child gang  in abd_gang_add_gang()
374 		 * the parent's list and immediately free the child gang ABD  in abd_gang_add_gang()
375 		 * struct. The parent gang ABDs children from the child gang  in abd_gang_add_gang()
404 			 * original child gang ABDs responsibility to determine  in abd_gang_add_gang()
415  * Add a child ABD to a gang ABD's chained list.
424 	 * If the child being added is a gang ABD, we will add the  in abd_gang_add()
425 	 * child's ABDs to the parent gang ABD. This allows us to account  in abd_gang_add()
426 	 * for the offset correctly in the parent gang ABD.  in abd_gang_add()
436 	 * another gang ABD, we must lock the child ABD's abd_mtx  in abd_gang_add()
438 	 * only after it is has been added to a gang ABD, which  in abd_gang_add()
440 	 * for how an ABD can be in multiple gang ABD's simultaneously.  in abd_gang_add()
446 		 * gang ABD then we must allocate a new  in abd_gang_add()
449 		 * adding it to the gang ABD's list, to make the  in abd_gang_add()
450 		 * gang ABD aware that it is responsible to call  in abd_gang_add()
455 		 * An ABD may become part of multiple gang ABD's. For  in abd_gang_add()
459 		 * different adjacent zio's. zio aggregation uses gang  in abd_gang_add()
461 		 * gang zio's.  in abd_gang_add()
465 		 * not be in multiple gang ABD's. The gang ABD  in abd_gang_add()
468 		 * multiple gang ABD's at one time.  in abd_gang_add()
486  * Locate the ABD for the supplied offset in the gang ABD.
719  * Initializes an abd_iter based on whether the abd is a gang ABD
741  * Advances an abd_iter. We have to be careful with gang ABD as
743  * must grab the ABD in the gang ABD's list.