From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Thu, 2 Jul 2020 17:19:46 +0800
Subject: mlx4: Mark PM functions as __maybe_unused
Patch-mainline: v5.9-rc1
Git-commit: 4e1a69116869b26d244c2522bd1631967b62ffce
References: jsc#SLE-15171

In certain configurations without power management support, the
following warnings happen:

drivers/net/ethernet/mellanox/mlx4/main.c:4388:12:
 warning: 'mlx4_resume' defined but not used [-Wunused-function]
 4388 | static int mlx4_resume(struct device *dev_d)
      |            ^~~~~~~~~~~
drivers/net/ethernet/mellanox/mlx4/main.c:4373:12: warning:
 'mlx4_suspend' defined but not used [-Wunused-function]
 4373 | static int mlx4_suspend(struct device *dev_d)
      |            ^~~~~~~~~~~~

Mark these functions as __maybe_unused to make it clear to the
compiler that this is going to happen based on the configuration,
which is the standard for these types of functions.

Fixes: 0e3e206a3e12 ("mlx4: use generic power management")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx4/main.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -4372,7 +4372,7 @@ static const struct pci_error_handlers m
 	.resume		= mlx4_pci_resume,
 };
 
-static int mlx4_suspend(struct device *dev_d)
+static int __maybe_unused mlx4_suspend(struct device *dev_d)
 {
 	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
@@ -4387,7 +4387,7 @@ static int mlx4_suspend(struct device *d
 	return 0;
 }
 
-static int mlx4_resume(struct device *dev_d)
+static int __maybe_unused mlx4_resume(struct device *dev_d)
 {
 	struct pci_dev *pdev = to_pci_dev(dev_d);
 	struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);