BCACHE_DEV_DETACHING
if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) ||
BUG_ON(!test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags));
clear_bit(BCACHE_DEV_DETACHING, &dc->disk.flags);
if (test_and_set_bit(BCACHE_DEV_DETACHING, &dc->disk.flags))
if (test_bit(BCACHE_DEV_DETACHING, &d->flags)) {
set_bit(BCACHE_DEV_DETACHING, &d->flags);
if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) ||
if (!test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) &&
if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags)) {
!test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags))
test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) ||