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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-22 11:17:51 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-07-12 15:42:03 -0700 |
| commit | 8da9a59523b6608f4b21f3e489578d0993c0779f (patch) | |
| tree | 7059a4926b5b50b52d15730958ff70c6ec2d71ea /kernel/rcu | |
| parent | rcutorture: Extract common code from rcu_torture_reader() (diff) | |
| download | linux-dev-8da9a59523b6608f4b21f3e489578d0993c0779f.tar.xz linux-dev-8da9a59523b6608f4b21f3e489578d0993c0779f.zip | |
rcutorture: Use atomic increment for n_rcu_torture_timers
Currently, rcu_torture_timer() relies on a lock to guard updates to
n_rcu_torture_timers. Unfortunately, consolidating code with
rcu_torture_reader() will dispense with this lock. This commit
therefore makes n_rcu_torture_timers be an atomic_long_t and uses
atomic_long_inc() to carry out the update.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 971e31ae9bcf..2452e4a29923 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -151,7 +151,7 @@ static long n_rcu_torture_boost_ktrerror; static long n_rcu_torture_boost_rterror; static long n_rcu_torture_boost_failure; static long n_rcu_torture_boosts; -static long n_rcu_torture_timers; +static atomic_long_t n_rcu_torture_timers; static long n_barrier_attempts; static long n_barrier_successes; static atomic_long_t n_cbfloods; @@ -1160,6 +1160,7 @@ static void rcu_torture_timer(struct timer_list *unused) int pipe_count; unsigned long long ts; + atomic_long_inc(&n_rcu_torture_timers); idx = cur_ops->readlock(); started = cur_ops->get_gp_seq(); ts = rcu_trace_clock_local(); @@ -1177,7 +1178,6 @@ static void rcu_torture_timer(struct timer_list *unused) atomic_inc(&n_rcu_torture_mberror); spin_lock(&rand_lock); cur_ops->read_delay(&rand); - n_rcu_torture_timers++; spin_unlock(&rand_lock); preempt_disable(); pipe_count = p->rtort_pipe_count; @@ -1290,7 +1290,7 @@ rcu_torture_stats_print(void) pr_cont("rtbf: %ld rtb: %ld nt: %ld ", n_rcu_torture_boost_failure, n_rcu_torture_boosts, - n_rcu_torture_timers); + atomic_long_read(&n_rcu_torture_timers)); torture_onoff_stats(); pr_cont("barrier: %ld/%ld:%ld ", n_barrier_successes, |