NULLB_DEV_FL_UP 320 drivers/block/null_blk_main.c if (test_and_set_bit(NULLB_DEV_FL_UP, &dev->flags)) NULLB_DEV_FL_UP 323 drivers/block/null_blk_main.c clear_bit(NULLB_DEV_FL_UP, &dev->flags); NULLB_DEV_FL_UP 330 drivers/block/null_blk_main.c if (test_and_clear_bit(NULLB_DEV_FL_UP, &dev->flags)) { NULLB_DEV_FL_UP 458 drivers/block/null_blk_main.c if (test_and_clear_bit(NULLB_DEV_FL_UP, &dev->flags)) {