atomic_add_return_acquire
cnts = (u32)atomic_add_return_acquire(_QR_BIAS, &lock->cnts);
cnts = atomic_add_return_acquire(_QR_BIAS, &lock->cnts);
KCSAN_EXPECT_READ_BARRIER(atomic_add_return_acquire(1, &dummy), false);
KCSAN_EXPECT_WRITE_BARRIER(atomic_add_return_acquire(1, &dummy), false);
KCSAN_EXPECT_RW_BARRIER(atomic_add_return_acquire(1, &dummy), false);
return atomic_add_return_acquire(i, v);