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Subject[PATCH 4.4 100/190] net/mlx5: avoid build warning for uniprocessor
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@arndb.de>


[ Upstream commit f0d7ae95fff4ab444b8433f07afc4b077ef1a285 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/mellanox/mlx5/core/main.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -522,10 +522,9 @@ static int mlx5_irq_set_affinity_hint(st
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;
}

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