Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx> wrote: > We can use global rwlocks as shown below safely, without fear of deadlocks: > > Readers: > > CPU 0 CPU 1 > ------ ------ > > 1. spin_lock(&random_lock); read_lock(&my_rwlock); > > > 2. read_lock(&my_rwlock); spin_lock(&random_lock); The lock order on CPU 0 is unsafe if CPU2 can do: write_lock(&my_rwlock); spin_lock(&random_lock); and on CPU 1 if CPU2 can do: spin_lock(&random_lock); write_lock(&my_rwlock); I presume you were specifically excluding these situations? David -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html