net/mlx5: avoid build warning for uniprocessor

Building the driver with CONFIG_SMP disabled results in a harmless
warning:

ethernet/mellanox/mlx5/core/main.c: In function 'mlx5_irq_set_affinity_hint':
ethernet/mellanox/mlx5/core/main.c:615:6: error: unused variable 'irq' [-Werror=unused-variable]

It's better to express the conditional compilation using IS_ENABLED()
here, as that lets the compiler see what the intented use for the variable
is, and that it can be silently discarded.

Fixes: b665d98edc9a ("net/mlx5: Tolerate irq_set_affinity_hint() failures")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index fe5546bb41537f0af0c4bcfe9054ccceaa42bbb2..af945edfee1905dbe676218cb53123535a37171f 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -621,10 +621,9 @@ static int mlx5_irq_set_affinity_hint(struct mlx5_core_dev *mdev, int i)
        cpumask_set_cpu(cpumask_local_spread(i, priv->numa_node),
                        priv->irq_info[i].mask);
 
-#ifdef CONFIG_SMP
-       if (irq_set_affinity_hint(irq, priv->irq_info[i].mask))
+       if (IS_ENABLED(CONFIG_SMP) &&
+           irq_set_affinity_hint(irq, priv->irq_info[i].mask))
                mlx5_core_warn(mdev, "irq_set_affinity_hint failed, irq 0x%.4x", irq);
-#endif
 
        return 0;
 }