443 	struct buffer_page		*head_page;	/* read from head */  member
493 	struct buffer_page		*head_page;  member
859 	head = cpu_buffer->head_page;  in rb_head_page_activate()
957 	if (RB_WARN_ON(cpu_buffer, !cpu_buffer->head_page))  in rb_set_head_page()
965 	page = head = cpu_buffer->head_page;  in rb_set_head_page()
975 				cpu_buffer->head_page = page;  in rb_set_head_page()
1111 	if (cpu_buffer->head_page)  in rb_check_pages()
1249 	cpu_buffer->head_page  in rb_allocate_cpu_buffer()
1251 	cpu_buffer->tail_page = cpu_buffer->commit_page = cpu_buffer->head_page;  in rb_allocate_cpu_buffer()
1491 		cpu_buffer->head_page = list_entry(next_page,  in rb_remove_pages()
1566 		struct list_head *head_page, *prev_page, *r;  in rb_insert_pages()  local
1570 		head_page = &rb_set_head_page(cpu_buffer)->list;  in rb_insert_pages()
1571 		if (!head_page)  in rb_insert_pages()
1573 		prev_page = head_page->prev;  in rb_insert_pages()
1579 				     ((unsigned long)head_page | RB_PAGE_HEAD);  in rb_insert_pages()
1592 			head_page->prev = last_page;  in rb_insert_pages()
1862 	return __rb_page_index(iter->head_page, iter->head);  in rb_iter_head_event()
1900 	if (iter->head_page == cpu_buffer->reader_page)  in rb_inc_iter()
1901 		iter->head_page = rb_set_head_page(cpu_buffer);  in rb_inc_iter()
1903 		rb_inc_page(cpu_buffer, &iter->head_page);  in rb_inc_iter()
1905 	iter->read_stamp = iter->head_page->page->time_stamp;  in rb_inc_iter()
3401 	iter->head_page = cpu_buffer->reader_page;  in rb_iter_reset()
3404 	iter->cache_reader_page = iter->head_page;  in rb_iter_reset()
3410 		iter->read_stamp = iter->head_page->page->time_stamp;  in rb_iter_reset()
3446 	return iter->head_page == cpu_buffer->commit_page &&  in ring_buffer_iter_empty()
3622 	rb_inc_page(cpu_buffer, &cpu_buffer->head_page);  in rb_get_reader_page()
3680 	if (iter->head >= rb_page_size(iter->head_page)) {  in rb_advance_iter()
3682 		if (iter->head_page == cpu_buffer->commit_page)  in rb_advance_iter()
3697 		       (iter->head_page == cpu_buffer->commit_page) &&  in rb_advance_iter()
3706 	if ((iter->head >= rb_page_size(iter->head_page)) &&  in rb_advance_iter()
3707 	    (iter->head_page != cpu_buffer->commit_page))  in rb_advance_iter()
3820 	if (iter->head >= rb_page_size(iter->head_page)) {  in rb_iter_peek()
4179 	cpu_buffer->head_page  in rb_reset_cpu()
4181 	local_set(&cpu_buffer->head_page->write, 0);  in rb_reset_cpu()
4182 	local_set(&cpu_buffer->head_page->entries, 0);  in rb_reset_cpu()
4183 	local_set(&cpu_buffer->head_page->page->commit, 0);  in rb_reset_cpu()
4185 	cpu_buffer->head_page->read = 0;  in rb_reset_cpu()
4187 	cpu_buffer->tail_page = cpu_buffer->head_page;  in rb_reset_cpu()
4188 	cpu_buffer->commit_page = cpu_buffer->head_page;  in rb_reset_cpu()