diff options
| -rw-r--r-- | tools/memory-model/linux-kernel.cat | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/tools/memory-model/linux-kernel.cat b/tools/memory-model/linux-kernel.cat index ab9de9c1234b..b8e6197f05af 100644 --- a/tools/memory-model/linux-kernel.cat +++ b/tools/memory-model/linux-kernel.cat @@ -91,32 +91,37 @@ acyclic pb as propagation (*******) (* - * Effect of read-side critical section proceeds from the rcu_read_lock() - * onward on the one hand and from the rcu_read_unlock() backwards on the + * Effects of read-side critical sections proceed from the rcu_read_unlock() + * backwards on the one hand, and from the rcu_read_lock() forwards on the * other hand. + * + * In the definition of rcu-fence below, the po term at the left-hand side + * of each disjunct and the po? term at the right-hand end have been factored + * out. They have been moved into the definitions of rcu-link and rb. *) -let rcu-rscsi = po ; rcu-rscs^-1 ; po? +let rcu-gp = [Sync-rcu] (* Compare with gp *) +let rcu-rscsi = rcu-rscs^-1 (* * The synchronize_rcu() strong fence is special in that it can order not * one but two non-rf relations, but only in conjunction with an RCU * read-side critical section. *) -let rcu-link = hb* ; pb* ; prop +let rcu-link = po? ; hb* ; pb* ; prop ; po (* * Any sequence containing at least as many grace periods as RCU read-side * critical sections (joined by rcu-link) acts as a generalized strong fence. *) -let rec rcu-fence = gp | - (gp ; rcu-link ; rcu-rscsi) | - (rcu-rscsi ; rcu-link ; gp) | - (gp ; rcu-link ; rcu-fence ; rcu-link ; rcu-rscsi) | - (rcu-rscsi ; rcu-link ; rcu-fence ; rcu-link ; gp) | +let rec rcu-fence = rcu-gp | + (rcu-gp ; rcu-link ; rcu-rscsi) | + (rcu-rscsi ; rcu-link ; rcu-gp) | + (rcu-gp ; rcu-link ; rcu-fence ; rcu-link ; rcu-rscsi) | + (rcu-rscsi ; rcu-link ; rcu-fence ; rcu-link ; rcu-gp) | (rcu-fence ; rcu-link ; rcu-fence) (* rb orders instructions just as pb does *) -let rb = prop ; rcu-fence ; hb* ; pb* +let rb = prop ; po ; rcu-fence ; po? ; hb* ; pb* irreflexive rb as rcu |