From 0172d9e322035bf7bb66a7dfdd795c38d71dbba9 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 15 Nov 2018 11:19:44 -0500 Subject: tools/memory-model: Rename some RCU relations In preparation for adding support for SRCU, rename "crit" to "rcu-rscs", rename "rscs" to "rcu-rscsi", and remove the restriction to only the outermost level of nesting. The name change is needed for disambiguating RCU read-side critical sections from SRCU read-side critical sections. Adding the "i" at the end of "rcu-rscsi" emphasizes that the relation is inverted; it links rcu_read_unlock() events to their corresponding preceding rcu_read_lock() events. The restriction to outermost nesting levels was never essential; it was included mostly to show that it could be done. Rather than add equivalent unnecessary code for SRCU lock nesting, it seemed better to remove the existing code. Signed-off-by: Alan Stern Signed-off-by: Paul E. McKenney Tested-by: Andrea Parri --- tools/memory-model/linux-kernel.cat | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'tools/memory-model/linux-kernel.cat') diff --git a/tools/memory-model/linux-kernel.cat b/tools/memory-model/linux-kernel.cat index 8f23c74a96fd..ab9de9c1234b 100644 --- a/tools/memory-model/linux-kernel.cat +++ b/tools/memory-model/linux-kernel.cat @@ -95,7 +95,7 @@ acyclic pb as propagation * onward on the one hand and from the rcu_read_unlock() backwards on the * other hand. *) -let rscs = po ; crit^-1 ; po? +let rcu-rscsi = po ; rcu-rscs^-1 ; po? (* * The synchronize_rcu() strong fence is special in that it can order not @@ -109,10 +109,10 @@ let rcu-link = hb* ; pb* ; prop * critical sections (joined by rcu-link) acts as a generalized strong fence. *) let rec rcu-fence = gp | - (gp ; rcu-link ; rscs) | - (rscs ; rcu-link ; gp) | - (gp ; rcu-link ; rcu-fence ; rcu-link ; rscs) | - (rscs ; rcu-link ; rcu-fence ; rcu-link ; 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) | (rcu-fence ; rcu-link ; rcu-fence) (* rb orders instructions just as pb does *) -- cgit v1.2.3-59-g8ed1b