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rcu: Remove unused variable rcu_perf_writer_state

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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>
[ paulmck: Also removed unused macros assigned to that variable. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Ethan Hansen 2019-08-07 17:27:32 -07:00 committed by Paul E. McKenney
parent 9f8ba55d49
commit b3ffb206dd
1 changed files with 0 additions and 16 deletions
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16
kernel/rcu/rcuperf.c
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@ -109,15 +109,6 @@ static unsigned long b_rcu_perf_writer_started;
static unsigned long b_rcu_perf_writer_finished; static unsigned long b_rcu_perf_writer_finished;
static DEFINE_PER_CPU(atomic_t, n_async_inflight); 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
#define RTWS_EXP_SYNC 3
#define RTWS_SYNC 4
#define RTWS_IDLE 5
#define RTWS_STOPPING 6
#define MAX_MEAS 10000 #define MAX_MEAS 10000
#define MIN_MEAS 100 #define MIN_MEAS 100
@ -404,25 +395,20 @@ retry:
if (!rhp) if (!rhp)
rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
if (rhp && atomic_read(this_cpu_ptr(&n_async_inflight)) < gp_async_max) { 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)); atomic_inc(this_cpu_ptr(&n_async_inflight));
cur_ops->async(rhp, rcu_perf_async_cb); cur_ops->async(rhp, rcu_perf_async_cb);
rhp = NULL; rhp = NULL;
} else if (!kthread_should_stop()) { } else if (!kthread_should_stop()) {
rcu_perf_writer_state = RTWS_BARRIER;
cur_ops->gp_barrier(); cur_ops->gp_barrier();
goto retry; goto retry;
} else { } else {
kfree(rhp); /* Because we are stopping. */ kfree(rhp); /* Because we are stopping. */
} }
} else if (gp_exp) { } else if (gp_exp) {
rcu_perf_writer_state = RTWS_EXP_SYNC;
cur_ops->exp_sync(); cur_ops->exp_sync();
} else { } else {
rcu_perf_writer_state = RTWS_SYNC;
cur_ops->sync(); cur_ops->sync();
} }
rcu_perf_writer_state = RTWS_IDLE;
t = ktime_get_mono_fast_ns(); t = ktime_get_mono_fast_ns();
*wdp = t - *wdp; *wdp = t - *wdp;
i_max = i; i_max = i;
@ -463,10 +449,8 @@ retry:
rcu_perf_wait_shutdown(); rcu_perf_wait_shutdown();
} while (!torture_must_stop()); } while (!torture_must_stop());
if (gp_async) { if (gp_async) {
rcu_perf_writer_state = RTWS_BARRIER;
cur_ops->gp_barrier(); cur_ops->gp_barrier();
} }
rcu_perf_writer_state = RTWS_STOPPING;
writer_n_durations[me] = i_max; writer_n_durations[me] = i_max;
torture_kthread_stopping("rcu_perf_writer"); torture_kthread_stopping("rcu_perf_writer");
return 0; return 0;