From: Josh Triplett Use the newly-generic synchronous deferred free function to implement torture testing for rcu_bh using synchronize_rcu_bh rather than the asynchronous call_rcu_bh. Signed-off-by: Josh Triplett Acked-by: Paul E. McKenney Signed-off-by: Andrew Morton --- Documentation/RCU/torture.txt | 5 +++-- kernel/rcutorture.c | 16 +++++++++++++++- 2 files changed, 18 insertions(+), 3 deletions(-) diff -puN Documentation/RCU/torture.txt~rcu-add-rcu_bh_sync-torture-type-to-rcutorture Documentation/RCU/torture.txt --- a/Documentation/RCU/torture.txt~rcu-add-rcu_bh_sync-torture-type-to-rcutorture +++ a/Documentation/RCU/torture.txt @@ -55,8 +55,9 @@ test_no_idle_hz Whether or not to test t torture_type The type of RCU to test: "rcu" for the rcu_read_lock() API, "rcu_sync" for rcu_read_lock() with synchronous reclamation, - "rcu_bh" for the rcu_read_lock_bh() API, and "srcu" for the - "srcu_read_lock()" API. + "rcu_bh" for the rcu_read_lock_bh() API, "rcu_bh_sync" for + rcu_read_lock_bh() with synchronous reclamation, and "srcu" + for the "srcu_read_lock()" API. verbose Enable debug printk()s. Default is disabled. diff -puN kernel/rcutorture.c~rcu-add-rcu_bh_sync-torture-type-to-rcutorture kernel/rcutorture.c --- a/kernel/rcutorture.c~rcu-add-rcu_bh_sync-torture-type-to-rcutorture +++ a/kernel/rcutorture.c @@ -370,6 +370,19 @@ static struct rcu_torture_ops rcu_bh_ops .name = "rcu_bh" }; +static struct rcu_torture_ops rcu_bh_sync_ops = { + .init = rcu_sync_torture_init, + .cleanup = NULL, + .readlock = rcu_bh_torture_read_lock, + .readdelay = rcu_read_delay, /* just reuse rcu's version. */ + .readunlock = rcu_bh_torture_read_unlock, + .completed = rcu_bh_torture_completed, + .deferredfree = rcu_sync_torture_deferred_free, + .sync = rcu_bh_torture_synchronize, + .stats = NULL, + .name = "rcu_bh_sync" +}; + /* * Definitions for srcu torture testing. */ @@ -452,7 +465,8 @@ static struct rcu_torture_ops srcu_ops = }; static struct rcu_torture_ops *torture_ops[] = - { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &srcu_ops, NULL }; + { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops, &srcu_ops, + NULL }; /* * RCU torture writer kthread. Repeatedly substitutes a new structure _