453 	struct buffer_page		*head_page;	/* read from head */  member
507 	struct buffer_page		*head_page;  member
915 	head = cpu_buffer->head_page;  in rb_head_page_activate()
1013 	if (RB_WARN_ON(cpu_buffer, !cpu_buffer->head_page))  in rb_set_head_page()
1021 	page = head = cpu_buffer->head_page;  in rb_set_head_page()
1031 				cpu_buffer->head_page = page;  in rb_set_head_page()
1159 	if (cpu_buffer->head_page)  in rb_check_pages()
1329 	cpu_buffer->head_page  in rb_allocate_cpu_buffer()
1331 	cpu_buffer->tail_page = cpu_buffer->commit_page = cpu_buffer->head_page;  in rb_allocate_cpu_buffer()
1552 		cpu_buffer->head_page = list_entry(next_page,  in rb_remove_pages()
1629 		struct list_head *head_page, *prev_page, *r;  in rb_insert_pages()  local
1633 		head_page = &rb_set_head_page(cpu_buffer)->list;  in rb_insert_pages()
1634 		if (!head_page)  in rb_insert_pages()
1636 		prev_page = head_page->prev;  in rb_insert_pages()
1642 				     ((unsigned long)head_page | RB_PAGE_HEAD);  in rb_insert_pages()
1655 			head_page->prev = last_page;  in rb_insert_pages()
1919 	return __rb_page_index(iter->head_page, iter->head);  in rb_iter_head_event()
1957 	if (iter->head_page == cpu_buffer->reader_page)  in rb_inc_iter()
1958 		iter->head_page = rb_set_head_page(cpu_buffer);  in rb_inc_iter()
1960 		rb_inc_page(cpu_buffer, &iter->head_page);  in rb_inc_iter()
1962 	iter->read_stamp = iter->head_page->page->time_stamp;  in rb_inc_iter()
3548 	iter->head_page = cpu_buffer->reader_page;  in rb_iter_reset()
3551 	iter->cache_reader_page = iter->head_page;  in rb_iter_reset()
3557 		iter->read_stamp = iter->head_page->page->time_stamp;  in rb_iter_reset()
3591 	struct buffer_page *head_page;  in ring_buffer_iter_empty()  local
3599 	head_page = cpu_buffer->head_page;  in ring_buffer_iter_empty()
3603 	return ((iter->head_page == commit_page && iter->head == commit) ||  in ring_buffer_iter_empty()
3604 		(iter->head_page == reader && commit_page == head_page &&  in ring_buffer_iter_empty()
3605 		 head_page->read == commit &&  in ring_buffer_iter_empty()
3779 	rb_inc_page(cpu_buffer, &cpu_buffer->head_page);  in rb_get_reader_page()
3839 	if (iter->head >= rb_page_size(iter->head_page)) {  in rb_advance_iter()
3841 		if (iter->head_page == cpu_buffer->commit_page)  in rb_advance_iter()
3856 		       (iter->head_page == cpu_buffer->commit_page) &&  in rb_advance_iter()
3865 	if ((iter->head >= rb_page_size(iter->head_page)) &&  in rb_advance_iter()
3866 	    (iter->head_page != cpu_buffer->commit_page))  in rb_advance_iter()
3989 	if (iter->head >= rb_page_size(iter->head_page)) {  in rb_iter_peek()
4354 	cpu_buffer->head_page  in rb_reset_cpu()
4356 	local_set(&cpu_buffer->head_page->write, 0);  in rb_reset_cpu()
4357 	local_set(&cpu_buffer->head_page->entries, 0);  in rb_reset_cpu()
4358 	local_set(&cpu_buffer->head_page->page->commit, 0);  in rb_reset_cpu()
4360 	cpu_buffer->head_page->read = 0;  in rb_reset_cpu()
4362 	cpu_buffer->tail_page = cpu_buffer->head_page;  in rb_reset_cpu()
4363 	cpu_buffer->commit_page = cpu_buffer->head_page;  in rb_reset_cpu()