Patch "net/mlx5: avoid build warning for uniprocessor" has been added to the 4.9-stable tree

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This is a note to let you know that I've just added the patch titled

    net/mlx5: avoid build warning for uniprocessor

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-mlx5-avoid-build-warning-for-uniprocessor.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From foo@baz Mon Apr  9 17:09:24 CEST 2018
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Mon, 29 May 2017 15:00:17 +0200
Subject: net/mlx5: avoid build warning for uniprocessor

From: Arnd Bergmann <arnd@xxxxxxxx>


[ 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@xxxxxxxx>
Acked-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 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
@@ -557,10 +557,9 @@ 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;
 }


Patches currently in stable-queue which might be from arnd@xxxxxxxx are

queue-4.9/net-mlx5-avoid-build-warning-for-uniprocessor.patch
queue-4.9/xen-avoid-type-warning-in-xchg_xen_ulong.patch



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