netdev - [net-next 04/12] net/mlx5: Align mlx5

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Message-Id: <20210811181658.492548-5-saeed@kernel.org>
Date:   Wed, 11 Aug 2021 11:16:50 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Tariq Toukan <tariqt@...dia.com>,
        Leon Romanovsky <leonro@...dia.com>,
        Shay Drory <shayd@...dia.com>, Parav Pandit <parav@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net-next 04/12] net/mlx5: Align mlx5_irq structure

From: Shay Drory <shayd@...dia.com>

mlx5_irq structure have holes due to incorrect position of fields in it.
Make them naturally align.

pahole output after alignment:
struct mlx5_irq {
        struct atomic_notifier_head nh;                  /*     0    72 */
        /* --- cacheline 1 boundary (64 bytes) was 8 bytes ago --- */
        cpumask_var_t              mask;                 /*    72     8 */
        char                       name[32];             /*    80    32 */
        struct mlx5_irq_pool *     pool;                 /*   112     8 */
        struct kref                kref;                 /*   120     4 */
        u32                        index;                /*   124     4 */
        /* --- cacheline 2 boundary (128 bytes) --- */
        int                        irqn;                 /*   128     4 */

        /* size: 136, cachelines: 3, members: 7 */
        /* padding: 4 */
        /* last cacheline: 8 bytes */

};

Signed-off-by: Shay Drory <shayd@...dia.com>
Reviewed-by: Parav Pandit <parav@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
index 9fb75d79bf08..a4f6ba0c91da 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c
@@ -28,13 +28,13 @@
 #define MLX5_EQ_REFS_PER_IRQ (2)
 
 struct mlx5_irq {
-	u32 index;
 	struct atomic_notifier_head nh;
 	cpumask_var_t mask;
 	char name[MLX5_MAX_IRQ_NAME];
+	struct mlx5_irq_pool *pool;
 	struct kref kref;
+	u32 index;
 	int irqn;
-	struct mlx5_irq_pool *pool;
 };
 
 struct mlx5_irq_pool {
-- 
2.31.1