netdev - [PATCH net-next 2/5] gianfar: Cleanup and optimize struct gfar

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Date:	Tue, 12 Feb 2013 14:47:14 +0200
From:	Claudiu Manoil <claudiu.manoil@...escale.com>
To:	<netdev@...r.kernel.org>
CC:	Paul Gortmaker <paul.gortmaker@...driver.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH net-next 2/5] gianfar: Cleanup and optimize struct gfar_private

* group run-time critical fields within the 1st cacheline
  followed by the tx|rx_queue reference arrays and the interrupt
  group instances (gfargrp) (all cacheline aligned)
* change 'padding' from unsigned short to u16
* clear 20+ byte memory hole
* group releated members
* push non-critical fields at the end of the struct

Signed-off-by: Claudiu Manoil <claudiu.manoil@...escale.com>
---
 drivers/net/ethernet/freescale/gianfar.h |   93 +++++++++++++++--------------
 1 files changed, 48 insertions(+), 45 deletions(-)

diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
index 22c2f7a..5304a58 100644
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -1054,28 +1054,64 @@ enum gfar_errata {
  * the buffer descriptor determines the actual condition.
  */
 struct gfar_private {
-
-	/* Indicates how many tx, rx queues are enabled */
-	unsigned int num_tx_queues;
 	unsigned int num_rx_queues;
-	unsigned int num_grps;
-	unsigned int mode;
-
-	/* The total tx and rx ring size for the enabled queues */
-	unsigned int total_tx_ring_size;
-	unsigned int total_rx_ring_size;
 
 	struct device *dev;
 	struct net_device *ndev;
-	struct platform_device *ofdev;
 	enum gfar_errata errata;
+	unsigned int rx_buffer_size;
+
+	u16 padding;
+
+	/* HW time stamping enabled flag */
+	int hwts_rx_en;
+	int hwts_tx_en;
 
-	struct gfar_priv_grp gfargrp[MAXGROUPS];
 	struct gfar_priv_tx_q *tx_queue[MAX_TX_QS];
 	struct gfar_priv_rx_q *rx_queue[MAX_RX_QS];
+	struct gfar_priv_grp gfargrp[MAXGROUPS];
+
+	u32 device_flags;
+
+	unsigned int mode;
+	unsigned int num_tx_queues;
+	unsigned int num_grps;
+
+	/* Network Statistics */
+	struct gfar_extra_stats extra_stats;
+
+	/* PHY stuff */
+	phy_interface_t interface;
+	struct device_node *phy_node;
+	struct device_node *tbi_node;
+	struct phy_device *phydev;
+	struct mii_bus *mii_bus;
+	int oldspeed;
+	int oldduplex;
+	int oldlink;
+
+	/* Bitfield update lock */
+	spinlock_t bflock;
+
+	uint32_t msg_enable;
+
+	struct work_struct reset_task;
+
+	struct platform_device *ofdev;
+	unsigned char
+		extended_hash:1,
+		bd_stash_en:1,
+		rx_filer_enable:1,
+		/* Wake-on-LAN enabled */
+		wol_en:1,
+		/* Enable priorty based Tx scheduling in Hw */
+		prio_sched_en:1;
+
+	/* The total tx and rx ring size for the enabled queues */
+	unsigned int total_tx_ring_size;
+	unsigned int total_rx_ring_size;
 
 	/* RX per device parameters */
-	unsigned int rx_buffer_size;
 	unsigned int rx_stash_size;
 	unsigned int rx_stash_index;
 
@@ -1094,39 +1130,6 @@ struct gfar_private {
 	unsigned int fifo_starve;
 	unsigned int fifo_starve_off;
 
-	/* Bitfield update lock */
-	spinlock_t bflock;
-
-	phy_interface_t interface;
-	struct device_node *phy_node;
-	struct device_node *tbi_node;
-	u32 device_flags;
-	unsigned char
-		extended_hash:1,
-		bd_stash_en:1,
-		rx_filer_enable:1,
-		wol_en:1, /* Wake-on-LAN enabled */
-		prio_sched_en:1; /* Enable priorty based Tx scheduling in Hw */
-	unsigned short padding;
-
-	/* PHY stuff */
-	struct phy_device *phydev;
-	struct mii_bus *mii_bus;
-	int oldspeed;
-	int oldduplex;
-	int oldlink;
-
-	uint32_t msg_enable;
-
-	struct work_struct reset_task;
-
-	/* Network Statistics */
-	struct gfar_extra_stats extra_stats;
-
-	/* HW time stamping enabled flag */
-	int hwts_rx_en;
-	int hwts_tx_en;
-
 	/*Filer table*/
 	unsigned int ftp_rqfpr[MAX_FILER_IDX + 1];
 	unsigned int ftp_rqfcr[MAX_FILER_IDX + 1];
-- 
1.6.6


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