^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) Prior Operation Subsequent Operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) --------------- ---------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) C Self R W RMW Self R W DR DW RMW SV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) -- ---- - - --- ---- - - -- -- --- --
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) Relaxed store Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) Relaxed load Y Y Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) Relaxed RMW operation Y Y Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) rcu_dereference() Y Y Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Successful *_acquire() R Y Y Y Y Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) Successful *_release() C Y Y Y W Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) smp_rmb() Y R Y Y R
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) smp_wmb() Y W Y Y W
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) smp_mb() & synchronize_rcu() CP Y Y Y Y Y Y Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) Successful full non-void RMW CP Y Y Y Y Y Y Y Y Y Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) smp_mb__before_atomic() CP Y Y Y a a a a Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) smp_mb__after_atomic() CP a a Y Y Y Y Y Y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) Key: Relaxed: A relaxed operation is either READ_ONCE(), WRITE_ONCE(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) a *_relaxed() RMW operation, an unsuccessful RMW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) operation, a non-value-returning RMW operation such
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) as atomic_inc(), or one of the atomic*_read() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) atomic*_set() family of operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) C: Ordering is cumulative
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) P: Ordering propagates
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) R: Read, for example, READ_ONCE(), or read portion of RMW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) W: Write, for example, WRITE_ONCE(), or write portion of RMW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) Y: Provides ordering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) a: Provides ordering given intervening RMW atomic operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) DR: Dependent read (address dependency)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) DW: Dependent write (address, data, or control dependency)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) RMW: Atomic read-modify-write operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) SELF: Orders self, as opposed to accesses before and/or after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) SV: Orders later accesses to the same variable