From: "Paul E. McKenney" <paulmck@xxxxxxxxxx> This commit adds a key entry enumerating the various types of relaxed operations. Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx> --- tools/memory-model/Documentation/cheatsheet.txt | 27 ++++++++++++++----------- 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/tools/memory-model/Documentation/cheatsheet.txt b/tools/memory-model/Documentation/cheatsheet.txt index 33ba98d..31b814d 100644 --- a/tools/memory-model/Documentation/cheatsheet.txt +++ b/tools/memory-model/Documentation/cheatsheet.txt @@ -5,7 +5,7 @@ Store, e.g., WRITE_ONCE() Y Y Load, e.g., READ_ONCE() Y Y Y Y -Unsuccessful RMW operation Y Y Y Y +Relaxed operation Y Y Y Y rcu_dereference() Y Y Y Y Successful *_acquire() R Y Y Y Y Y Y Successful *_release() C Y Y Y W Y @@ -17,14 +17,17 @@ smp_mb__before_atomic() CP Y Y Y a a a a Y smp_mb__after_atomic() CP a a Y Y Y Y Y Y -Key: C: Ordering is cumulative - P: Ordering propagates - R: Read, for example, READ_ONCE(), or read portion of RMW - W: Write, for example, WRITE_ONCE(), or write portion of RMW - Y: Provides ordering - a: Provides ordering given intervening RMW atomic operation - DR: Dependent read (address dependency) - DW: Dependent write (address, data, or control dependency) - RMW: Atomic read-modify-write operation - SELF: Orders self, as opposed to accesses before and/or after - SV: Orders later accesses to the same variable +Key: Relaxed: A relaxed operation is either a *_relaxed() RMW + operation, an unsuccessful RMW operation, or one of + the atomic_read() and atomic_set() family of operations. + C: Ordering is cumulative + P: Ordering propagates + R: Read, for example, READ_ONCE(), or read portion of RMW + W: Write, for example, WRITE_ONCE(), or write portion of RMW + Y: Provides ordering + a: Provides ordering given intervening RMW atomic operation + DR: Dependent read (address dependency) + DW: Dependent write (address, data, or control dependency) + RMW: Atomic read-modify-write operation + SELF: Orders self, as opposed to accesses before and/or after + SV: Orders later accesses to the same variable -- 2.9.5
