wait_on_page_bit  327 include/linux/pagemap.h extern void wait_on_page_bit(struct page *page, int bit_nr);
wait_on_page_bit  339 include/linux/pagemap.h 		wait_on_page_bit(page, PG_locked);
wait_on_page_bit  348 include/linux/pagemap.h 		wait_on_page_bit(page, PG_writeback);