[PATCH 1/3] rcuperf: Remove unnecessary rcu_perf_writer_state variable

[SeongJae Park]

rcu_perf_writer_state is being written only while nobody reads it.  This
commit removes the unnecessary variable and macro constants for it.

Signed-off-by: SeongJae Park <sj38.p...@gmail.com>
---
 kernel/rcu/rcuperf.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index d38ab08..6025342 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -86,13 +86,6 @@ static u64 t_rcu_perf_writer_finished;
 static unsigned long b_rcu_perf_writer_started;
 static unsigned long b_rcu_perf_writer_finished;
 
-static int rcu_perf_writer_state;
-#define RTWS_INIT              0
-#define RTWS_EXP_SYNC          1
-#define RTWS_SYNC              2
-#define RTWS_IDLE              2
-#define RTWS_STOPPING          3
-
 #define MAX_MEAS 10000
 #define MIN_MEAS 100
 
@@ -381,14 +374,10 @@ rcu_perf_writer(void *arg)
        do {
                wdp = &wdpp[i];
                *wdp = ktime_get_mono_fast_ns();
-               if (gp_exp) {
-                       rcu_perf_writer_state = RTWS_EXP_SYNC;
+               if (gp_exp)
                        cur_ops->exp_sync();
-               } else {
-                       rcu_perf_writer_state = RTWS_SYNC;
+               else
                        cur_ops->sync();
-               }
-               rcu_perf_writer_state = RTWS_IDLE;
                t = ktime_get_mono_fast_ns();
                *wdp = t - *wdp;
                i_max = i;
@@ -429,7 +418,6 @@ rcu_perf_writer(void *arg)
                        i++;
                rcu_perf_wait_shutdown();
        } while (!torture_must_stop());
-       rcu_perf_writer_state = RTWS_STOPPING;
        writer_n_durations[me] = i_max;
        torture_kthread_stopping("rcu_perf_writer");
        return 0;
-- 
1.9.1