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tools/memory-model: Update some warning labels

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Some of the warning labels used in the LKMM are unfortunately
ambiguous.  In particular, the same warning is used for both an
unmatched rcu_read_lock() call and for an unmatched rcu_read_unlock()
call.  Likewise for the srcu_* equivalents.  Also, the warning about
passing a wrong value to srcu_read_unlock() -- i.e., a value different
from the one returned by the matching srcu_read_lock() -- talks about
bad nesting rather than non-matching values.

Let's update the warning labels to make their meanings more clear.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reviewed-by: Jonas Oberhauser <jonas.oberhauser@huaweicloud.com>
Acked-by: Andrea Parri <parri.andrea@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Alan Stern 2023-01-25 15:20:51 -05:00 committed by Paul E. McKenney
parent fe15c26ee2
commit 627c9ad04f
1 changed files with 5 additions and 5 deletions
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10
tools/memory-model/linux-kernel.bell
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@ -53,8 +53,8 @@ let rcu-rscs = let rec
in matched
(* Validate nesting *)
flag ~empty Rcu-lock \ domain(rcu-rscs) as unbalanced-rcu-locking
flag ~empty Rcu-unlock \ range(rcu-rscs) as unbalanced-rcu-locking
flag ~empty Rcu-lock \ domain(rcu-rscs) as unmatched-rcu-lock
flag ~empty Rcu-unlock \ range(rcu-rscs) as unmatched-rcu-unlock
(* Compute matching pairs of nested Srcu-lock and Srcu-unlock *)
let srcu-rscs = let rec
@ -69,14 +69,14 @@ let srcu-rscs = let rec
in matched
(* Validate nesting *)
flag ~empty Srcu-lock \ domain(srcu-rscs) as unbalanced-srcu-locking
flag ~empty Srcu-unlock \ range(srcu-rscs) as unbalanced-srcu-locking
flag ~empty Srcu-lock \ domain(srcu-rscs) as unmatched-srcu-lock
flag ~empty Srcu-unlock \ range(srcu-rscs) as unmatched-srcu-unlock
(* Check for use of synchronize_srcu() inside an RCU critical section *)
flag ~empty rcu-rscs & (po ; [Sync-srcu] ; po) as invalid-sleep
(* Validate SRCU dynamic match *)
flag ~empty different-values(srcu-rscs) as srcu-bad-nesting
flag ~empty different-values(srcu-rscs) as srcu-bad-value-match
(* Compute marked and plain memory accesses *)
let Marked = (~M) | IW | Once | Release | Acquire | domain(rmw) | range(rmw) |