linux-kernel - [PATCH net v5 3/3] bonding: 3ad: make ad_ticks_per

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Message-Id: <396d7dd218ea8e95bd6f1f0e6fc44c696e8c7502.1660919940.git.jtoppins@redhat.com>
Date:   Fri, 19 Aug 2022 11:15:14 -0400
From:   Jonathan Toppins <jtoppins@...hat.com>
To:     netdev@...r.kernel.org, jay.vosburgh@...onical.com
Cc:     liuhangbin@...il.com, Jay Vosburgh <j.vosburgh@...il.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH net v5 3/3] bonding: 3ad: make ad_ticks_per_sec a const

The value is only ever set once in bond_3ad_initialize and only ever
read otherwise. There seems to be no reason to set the variable via
bond_3ad_initialize when setting the global variable will do. Change
ad_ticks_per_sec to a const to enforce its read-only usage.

Signed-off-by: Jonathan Toppins <jtoppins@...hat.com>
---

Notes:
    v4:
     * remove passing the value of ad_ticks_per_sec on the stack and
       set ad_ticks_per_sec and make as const
    v5:
     * fixup kdoc for bond_3ad_initialize

 drivers/net/bonding/bond_3ad.c  | 11 +++--------
 drivers/net/bonding/bond_main.c |  2 +-
 include/net/bond_3ad.h          |  2 +-
 3 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 1f0120cbe9e8..184608bd8999 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -84,7 +84,8 @@ enum ad_link_speed_type {
 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
 	0, 0, 0, 0, 0, 0
 };
-static u16 ad_ticks_per_sec;
+
+static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;
 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
 
 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
@@ -2001,11 +2002,10 @@ void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
 /**
  * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
  * @bond: bonding struct to work on
- * @tick_resolution: tick duration (millisecond resolution)
  *
  * Can be called only after the mac address of the bond is set.
  */
-void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
+void bond_3ad_initialize(struct bonding *bond)
 {
 	BOND_AD_INFO(bond).aggregator_identifier = 0;
 	BOND_AD_INFO(bond).system.sys_priority =
@@ -2017,11 +2017,6 @@ void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
 		BOND_AD_INFO(bond).system.sys_mac_addr =
 		    *((struct mac_addr *)bond->params.ad_actor_system);
 
-	/* initialize how many times this module is called in one
-	 * second (should be about every 100ms)
-	 */
-	ad_ticks_per_sec = tick_resolution;
-
 	bond_3ad_initiate_agg_selection(bond,
 					AD_AGGREGATOR_SELECTION_TIMER *
 					ad_ticks_per_sec);
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 50e60843020c..2f4da2c13c0a 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2081,7 +2081,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
 			/* Initialize AD with the number of times that the AD timer is called in 1 second
 			 * can be called only after the mac address of the bond is set
 			 */
-			bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
+			bond_3ad_initialize(bond);
 		} else {
 			SLAVE_AD_INFO(new_slave)->id =
 				SLAVE_AD_INFO(prev_slave)->id + 1;
diff --git a/include/net/bond_3ad.h b/include/net/bond_3ad.h
index 184105d68294..be2992e6de5d 100644
--- a/include/net/bond_3ad.h
+++ b/include/net/bond_3ad.h
@@ -290,7 +290,7 @@ static inline const char *bond_3ad_churn_desc(churn_state_t state)
 }
 
 /* ========== AD Exported functions to the main bonding code ========== */
-void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution);
+void bond_3ad_initialize(struct bonding *bond);
 void bond_3ad_bind_slave(struct slave *slave);
 void bond_3ad_unbind_slave(struct slave *slave);
 void bond_3ad_state_machine_handler(struct work_struct *);
-- 
2.31.1