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 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: net-mlx5-avoid-build-warning-for-uniprocessor.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Tue Apr 10 10:31:53 CEST 2018

From: Arnd Bergmann arnd@arndb.de Date: Mon, 29 May 2017 15:00:17 +0200 Subject: net/mlx5: avoid build warning for uniprocessor

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; }

Patches currently in stable-queue which might be from arnd@arndb.de are

queue-4.4/net-mlx5-avoid-build-warning-for-uniprocessor.patch queue-4.4/xen-avoid-type-warning-in-xchg_xen_ulong.patch