[PATCH tip/core/rcu 1/1] rcu: Remove unused variable rcu_perf_writer_state

Ethan Hansen
2019-08-07T23:27:20Z

The variable rcu_perf_writer_state is declared and initialized,
but is never actually referenced. Remove it to clean code.

Signed-off-by: Ethan Hansen <1ethanhansen@gmail.com>
---
kernel/rcu/rcuperf.c | 8 --------
1 file changed, 8 deletions(-)

diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index 5a879d0..ff02936 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -109,7 +109,6 @@
static unsigned long b_rcu_perf_writer_finished;
static DEFINE_PER_CPU(atomic_t, n_async_inflight);

-static int rcu_perf_writer_state;
#define RTWS_INIT 0
#define RTWS_ASYNC 1
#define RTWS_BARRIER 2
@@ -404,25 +403,20 @@ static void rcu_perf_async_cb(struct rcu_head *rhp)
if (!rhp)
rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
if (rhp && atomic_read(this_cpu_ptr(&n_async_inflight)) < gp_async_max) {
- rcu_perf_writer_state = RTWS_ASYNC;
atomic_inc(this_cpu_ptr(&n_async_inflight));
cur_ops->async(rhp, rcu_perf_async_cb);
rhp = NULL;
} else if (!kthread_should_stop()) {
- rcu_perf_writer_state = RTWS_BARRIER;
cur_ops->gp_barrier();
goto retry;
} else {
kfree(rhp); /* Because we are stopping. */
}
} else if (gp_exp) {
- rcu_perf_writer_state = RTWS_EXP_SYNC;
cur_ops->exp_sync();
} else {
- rcu_perf_writer_state = RTWS_SYNC;
cur_ops->sync();
}
- rcu_perf_writer_state = RTWS_IDLE;
t = ktime_get_mono_fast_ns();
*wdp = t - *wdp;
i_max = i;
@@ -463,10 +457,8 @@ static void rcu_perf_async_cb(struct rcu_head *rhp)
rcu_perf_wait_shutdown();
} while (!torture_must_stop());
if (gp_async) {
- rcu_perf_writer_state = RTWS_BARRIER;
cur_ops->gp_barrier();
}
- rcu_perf_writer_state = RTWS_STOPPING;
writer_n_durations[me] = i_max;
torture_kthread_stopping("rcu_perf_writer");
return 0;
--
1.8.3.1