linux-kernel - [tip: core/rcu] rcu: Remove unused variable rcu_perf_writer

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <157252290845.29376.5219527334083036042.tip-bot2@tip-bot2>
Date:   Thu, 31 Oct 2019 11:55:08 -0000
From:   "tip-bot2 for Ethan Hansen" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Ethan Hansen <1ethanhansen@...il.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        linux-kernel@...r.kernel.org
Subject: [tip: core/rcu] rcu: Remove unused variable rcu_perf_writer_state

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     b3ffb206ddd7f07d83bafd10e1b403df57055af4
Gitweb:        https://git.kernel.org/tip/b3ffb206ddd7f07d83bafd10e1b403df57055af4
Author:        Ethan Hansen <1ethanhansen@...il.com>
AuthorDate:    Wed, 07 Aug 2019 17:27:32 -07:00
Committer:     Paul E. McKenney <paulmck@...nel.org>
CommitterDate: Sat, 05 Oct 2019 11:49:36 -07:00

rcu: Remove unused variable rcu_perf_writer_state

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@...il.com>
[ paulmck: Also removed unused macros assigned to that variable. ]
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/rcu/rcuperf.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index 5a879d0..5f884d5 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -109,15 +109,6 @@ static unsigned long b_rcu_perf_writer_started;
 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
-#define RTWS_EXP_SYNC		3
-#define RTWS_SYNC		4
-#define RTWS_IDLE		5
-#define RTWS_STOPPING		6
-
 #define MAX_MEAS 10000
 #define MIN_MEAS 100
 
@@ -404,25 +395,20 @@ retry:
 			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 +449,8 @@ retry:
 		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;