726 	struct io_sample *prev;  in pid_begin_io_sample()  local
737 	prev = c->io_samples;  in pid_begin_io_sample()
739 	if (prev && prev->start_time && !prev->end_time) {  in pid_begin_io_sample()
745 		c->io_samples = prev->next;  in pid_begin_io_sample()
746 		free(prev);  in pid_begin_io_sample()
770 	struct io_sample *sample, *prev;  in pid_end_io_sample()  local
794 	prev = sample->next;  in pid_end_io_sample()
800 	if (prev && sample->start_time < prev->end_time) {  in pid_end_io_sample()
801 		if (prev->err) /* try to make errors more visible */  in pid_end_io_sample()
802 			sample->start_time = prev->end_time;  in pid_end_io_sample()
804 			prev->end_time = sample->start_time;  in pid_end_io_sample()
821 	if (prev &&  in pid_end_io_sample()
822 	    prev->type == sample->type &&  in pid_end_io_sample()
823 	    prev->err == sample->err &&  in pid_end_io_sample()
824 	    prev->fd == sample->fd &&  in pid_end_io_sample()
825 	    prev->end_time + tchart->merge_dist >= sample->start_time) {  in pid_end_io_sample()
827 		sample->bytes += prev->bytes;  in pid_end_io_sample()
828 		sample->merges += prev->merges + 1;  in pid_end_io_sample()
830 		sample->start_time = prev->start_time;  in pid_end_io_sample()
831 		sample->next = prev->next;  in pid_end_io_sample()
832 		free(prev);  in pid_end_io_sample()
968 	struct per_pid *new_list, *p, *cursor, *prev;  in sort_pids()  local
983 		prev = NULL;  in sort_pids()
989 				if (prev) {  in sort_pids()
990 					p->next = prev->next;  in sort_pids()
991 					prev->next = p;  in sort_pids()
1002 			prev = cursor;  in sort_pids()
1005 				prev->next = p;  in sort_pids()