255 	int trim = msg->sg.size - len;  in sk_msg_trim()  local
258 	if (trim <= 0) {  in sk_msg_trim()
259 		WARN_ON(trim < 0);  in sk_msg_trim()
266 	       trim >= msg->sg.data[i].length) {  in sk_msg_trim()
267 		trim -= msg->sg.data[i].length;  in sk_msg_trim()
270 		if (!trim)  in sk_msg_trim()
274 	msg->sg.data[i].length -= trim;  in sk_msg_trim()
275 	sk_mem_uncharge(sk, trim);  in sk_msg_trim()
283 	/* If we trim data a full sg elem before curr pointer update  in sk_msg_trim()
350 	/* Revert iov_iter updates, msg will need to use 'trim' later if it  in sk_msg_zerocopy_from_iter()
369 		/* This is possible if a trim operation shrunk the buffer */  in sk_msg_memcopy_from_iter()