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From: Jules Irenge <jbi.octave@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, paulmck@kernel.org, mingo@redhat.com,
	boqun.feng@gmail.com, Jules Irenge <jbi.octave@gmail.com>,
	Josh Triplett <josh@joshtriplett.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	Joel Fernandes <joel@joelfernandes.org>,
	rcu@vger.kernel.org (open list:READ-COPY UPDATE (RCU))
Subject: [PATCH 3/5] rcu: replace + with |
Date: Mon,  1 Jun 2020 19:45:50 +0100	[thread overview]
Message-ID: <20200601184552.23128-4-jbi.octave@gmail.com> (raw)
In-Reply-To: <20200601184552.23128-1-jbi.octave@gmail.com>

Coccinelle reports warnings at rcu_preempt_ctxt_queue()

WARNING: sum of probable bitmasks, consider |

The root cause is the use of addition operator + for bitmask defined macros variables
Replacing + with | fixes the issue.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
---
 kernel/rcu/tree_plugin.h | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 097635c41135..a20135ece06a 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -153,9 +153,9 @@ static void rcu_preempt_ctxt_queue(struct rcu_node *rnp, struct rcu_data *rdp)
 	switch (blkd_state) {
 	case 0:
 	case                RCU_EXP_TASKS:
-	case                RCU_EXP_TASKS + RCU_GP_BLKD:
+	case                RCU_EXP_TASKS | RCU_GP_BLKD:
 	case RCU_GP_TASKS:
-	case RCU_GP_TASKS + RCU_EXP_TASKS:
+	case RCU_GP_TASKS | RCU_EXP_TASKS:
 
 		/*
 		 * Blocking neither GP, or first task blocking the normal
@@ -168,10 +168,10 @@ static void rcu_preempt_ctxt_queue(struct rcu_node *rnp, struct rcu_data *rdp)
 
 	case                                              RCU_EXP_BLKD:
 	case                                RCU_GP_BLKD:
-	case                                RCU_GP_BLKD + RCU_EXP_BLKD:
-	case RCU_GP_TASKS +                               RCU_EXP_BLKD:
-	case RCU_GP_TASKS +                 RCU_GP_BLKD + RCU_EXP_BLKD:
-	case RCU_GP_TASKS + RCU_EXP_TASKS + RCU_GP_BLKD + RCU_EXP_BLKD:
+	case                                RCU_GP_BLKD | RCU_EXP_BLKD:
+	case RCU_GP_TASKS |                               RCU_EXP_BLKD:
+	case RCU_GP_TASKS |                 RCU_GP_BLKD | RCU_EXP_BLKD:
+	case RCU_GP_TASKS | RCU_EXP_TASKS | RCU_GP_BLKD | RCU_EXP_BLKD:
 
 		/*
 		 * First task arriving that blocks either GP, or first task
@@ -184,9 +184,9 @@ static void rcu_preempt_ctxt_queue(struct rcu_node *rnp, struct rcu_data *rdp)
 		list_add_tail(&t->rcu_node_entry, &rnp->blkd_tasks);
 		break;
 
-	case                RCU_EXP_TASKS +               RCU_EXP_BLKD:
-	case                RCU_EXP_TASKS + RCU_GP_BLKD + RCU_EXP_BLKD:
-	case RCU_GP_TASKS + RCU_EXP_TASKS +               RCU_EXP_BLKD:
+	case                RCU_EXP_TASKS |               RCU_EXP_BLKD:
+	case                RCU_EXP_TASKS | RCU_GP_BLKD | RCU_EXP_BLKD:
+	case RCU_GP_TASKS | RCU_EXP_TASKS |               RCU_EXP_BLKD:
 
 		/*
 		 * Second or subsequent task blocking the expedited GP.
@@ -197,8 +197,8 @@ static void rcu_preempt_ctxt_queue(struct rcu_node *rnp, struct rcu_data *rdp)
 		list_add(&t->rcu_node_entry, rnp->exp_tasks);
 		break;
 
-	case RCU_GP_TASKS +                 RCU_GP_BLKD:
-	case RCU_GP_TASKS + RCU_EXP_TASKS + RCU_GP_BLKD:
+	case RCU_GP_TASKS |                 RCU_GP_BLKD:
+	case RCU_GP_TASKS | RCU_EXP_TASKS | RCU_GP_BLKD:
 
 		/*
 		 * Second or subsequent task blocking the normal GP.
-- 
2.18.2


  parent reply	other threads:[~2020-06-01 18:46 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-01 18:45 [PATCH 0/5] cleanups Jules Irenge
2020-06-01 18:45 ` [PATCH 1/5] rcu/rcutorture: replace 0 with false Jules Irenge
2020-06-01 18:45 ` [PATCH 2/5] rcu: replace 1 with true Jules Irenge
2020-06-01 18:45 ` Jules Irenge [this message]
2020-06-01 18:45 ` [PATCH 4/5] x86/ftrace: Add annotations for ftrace_arch_code_modify_prepare() and ftrace_arch_code_modify_post_process() Jules Irenge
2020-06-01 19:46   ` Steven Rostedt
2020-06-01 22:01     ` ý€€€„
2020-06-02 23:10     ` Luc Van Oostenryck
2020-06-05  7:42       ` ý€€€„
2020-06-01 18:45 ` [PATCH 5/5] sfc: add missing annotation for efx_ef10_try_update_nic_stats_vf() Jules Irenge
2020-06-01 22:52   ` David Miller
2020-06-02 16:45 ` [PATCH 0/5] cleanups Paul E. McKenney
2020-06-05  7:45   ` ý€€€„

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