cache_reader_page  509 kernel/trace/ring_buffer.c 	struct buffer_page		*cache_reader_page;
cache_reader_page 3552 kernel/trace/ring_buffer.c 	iter->cache_reader_page = iter->head_page;
cache_reader_page 3969 kernel/trace/ring_buffer.c 		     iter->cache_reader_page != cpu_buffer->reader_page))