fm10k: prefer READ_ONCE instead of ACCESS_ONCE

While technically not needed, as all our uses of ACCESS_ONCE are scalar
types, we already use READ_ONCE in a few places, and for code
readability we can swap all the uses of the older ACCESS_ONCE into
READ_ONCE.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_common.h b/drivers/net/ethernet/intel/fm10k/fm10k_common.h
index 50f71e9..d51f9c7 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_common.h
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_common.h
@@ -34,7 +34,7 @@ u32 fm10k_read_reg(struct fm10k_hw *hw, int reg);
 /* write operations, indexed using DWORDS */
 #define fm10k_write_reg(hw, reg, val) \
 do { \
-       u32 __iomem *hw_addr = ACCESS_ONCE((hw)->hw_addr); \
+       u32 __iomem *hw_addr = READ_ONCE((hw)->hw_addr); \
        if (!FM10K_REMOVED(hw_addr)) \
                writel((val), &hw_addr[(reg)]); \
 } while (0)
@@ -42,7 +42,7 @@ do { \
 /* Switch register write operations, index using DWORDS */
 #define fm10k_write_sw_reg(hw, reg, val) \
 do { \
-       u32 __iomem *sw_addr = ACCESS_ONCE((hw)->sw_addr); \
+       u32 __iomem *sw_addr = READ_ONCE((hw)->sw_addr); \
        if (!FM10K_REMOVED(sw_addr)) \
                writel((val), &sw_addr[(reg)]); \
 } while (0)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_iov.c b/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
index 47f0743..d9dec81 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
@@ -51,7 +51,7 @@ s32 fm10k_iov_event(struct fm10k_intfc *interface)
        int i;
 
        /* if there is no iov_data then there is no mailbox to process */
-       if (!ACCESS_ONCE(interface->iov_data))
+       if (!READ_ONCE(interface->iov_data))
                return 0;
 
        rcu_read_lock();
@@ -99,7 +99,7 @@ s32 fm10k_iov_mbx(struct fm10k_intfc *interface)
        int i;
 
        /* if there is no iov_data then there is no mailbox to process */
-       if (!ACCESS_ONCE(interface->iov_data))
+       if (!READ_ONCE(interface->iov_data))
                return 0;
 
        rcu_read_lock();

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index 316f95b..4b65364 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -1408,7 +1408,7 @@ static void fm10k_update_itr(struct fm10k_ring_container *ring_container)
         * that the calculation will never get below a 1. The bit shift
         * accounts for changes in the ITR due to PCIe link speed.
         */
-       itr_round = ACCESS_ONCE(ring_container->itr_scale) + 8;
+       itr_round = READ_ONCE(ring_container->itr_scale) + 8;
        avg_wire_size += BIT(itr_round) - 1;
        avg_wire_size >>= itr_round;
 

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
index 20a5bbe..855833e 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_netdev.c
@@ -1098,7 +1098,7 @@ static struct rtnl_link_stats64 *fm10k_get_stats64(struct net_device *netdev,
        rcu_read_lock();
 
        for (i = 0; i < interface->num_rx_queues; i++) {
-               ring = ACCESS_ONCE(interface->rx_ring[i]);
+               ring = READ_ONCE(interface->rx_ring[i]);
 
                if (!ring)
                        continue;
@@ -1114,7 +1114,7 @@ static struct rtnl_link_stats64 *fm10k_get_stats64(struct net_device *netdev,
        }
 
        for (i = 0; i < interface->num_tx_queues; i++) {
-               ring = ACCESS_ONCE(interface->tx_ring[i]);
+               ring = READ_ONCE(interface->tx_ring[i]);
 
                if (!ring)
                        continue;
@@ -1299,7 +1299,7 @@ static void *fm10k_dfwd_add_station(struct net_device *dev,
 static void fm10k_dfwd_del_station(struct net_device *dev, void *priv)
 {
        struct fm10k_intfc *interface = netdev_priv(dev);
-       struct fm10k_l2_accel *l2_accel = ACCESS_ONCE(interface->l2_accel);
+       struct fm10k_l2_accel *l2_accel = READ_ONCE(interface->l2_accel);
        struct fm10k_dglort_cfg dglort = { 0 };
        struct fm10k_hw *hw = &interface->hw;
        struct net_device *sdev = priv;

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
index 20c2a0c..11b2955 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
@@ -62,7 +62,7 @@ u16 fm10k_read_pci_cfg_word(struct fm10k_hw *hw, u32 reg)
 
 u32 fm10k_read_reg(struct fm10k_hw *hw, int reg)
 {
-       u32 __iomem *hw_addr = ACCESS_ONCE(hw->hw_addr);
+       u32 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
        u32 value = 0;
 
        if (FM10K_REMOVED(hw_addr))