__LC_LOCKED
D_ASSERT(device, test_bit(__LC_LOCKED, &device->act_log->flags));
#define LC_LOCKED (1<<__LC_LOCKED)
return !test_and_set_bit(__LC_LOCKED, &lc->flags);
clear_bit_unlock(__LC_LOCKED, &lc->flags);
if (test_bit(__LC_LOCKED, &lc->flags)) {