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scftorture: Check unexpected "switch" statement value 

This commit adds a "default" case to the switch statement in
scftorture_invoke_one() which contains a WARN_ON_ONCE() and an assignment
to ->scfc_out to suppress knock-on warnings.  These knock-on warnings
could otherwise cause the user to think that there was a memory-ordering
problem in smp_call_function() instead of a bug in scftorture.c itself.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-07-02 12:15:37 -07:00
parent 9a52a57467
commit de77d4da54
1 changed files with 4 additions and 0 deletions
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4
kernel/scftorture.c
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@ -357,6 +357,10 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
}
smp_call_function(scf_handler, scfcp, scfsp->scfs_wait);
break;
default:
WARN_ON_ONCE(1);
if (scfcp)
scfcp->scfc_out = true;
}
if (scfcp && scfsp->scfs_wait) {
if (WARN_ON_ONCE(!scfcp->scfc_out))