search for: c2bc66082e10

...supposed need for a compiler barrier either (read_barrier_depends() doesn't generally provide this). Does anybody know which accesses are being ordered here? Usually you'd need a READ_ONCE()/rcu_dereference() beginning the chain, but I haven't managed to find one... Thanks, Will [1] c2bc66082e10 ("locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()")

...supposed need for a compiler barrier either (read_barrier_depends() doesn't generally provide this). Does anybody know which accesses are being ordered here? Usually you'd need a READ_ONCE()/rcu_dereference() beginning the chain, but I haven't managed to find one... Thanks, Will [1] c2bc66082e10 ("locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()")

...rasnlate_desc() that stores the userspace buffer pointer in the iov 2) copy_from_iter() that reads from those pointers So we need a data dependency barrier in the middle as explained in the memory-barriers.txt? (since READ_ONCE is not used in iov iterator). Thanks > > Will > > [1] c2bc66082e10 ("locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()")

...barrier_depends() doesn't generally provide this). > > Does anybody know which accesses are being ordered here? Usually you'd need > a READ_ONCE()/rcu_dereference() beginning the chain, but I haven't managed > to find one... > > Thanks, > > Will > > [1] c2bc66082e10 ("locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()")