From 5f35f78ead51035a5018bb1ef55f65792013f7cb Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sat, 18 Sep 2021 10:05:06 -0700
Subject: [PATCH] spi: Fix tegra20 build with CONFIG_PM=n
Mime-version: 1.0
Content-type: text/plain; charset=UTF-8
Content-transfer-encoding: 8bit
Git-commit: efafec27c5658ed987e720130772f8933c685e87
Patch-mainline: v5.15-rc2
References: stable-5.14.9

[ Upstream commit efafec27c5658ed987e720130772f8933c685e87 ]

Without CONFIG_PM enabled, the SET_RUNTIME_PM_OPS() macro ends up being
empty, and the only use of tegra_slink_runtime_{resume,suspend} goes
away, resulting in

  drivers/spi/spi-tegra20-slink.c:1200:12: error: ‘tegra_slink_runtime_resume’ defined but not used [-Werror=unused-function]
   1200 | static int tegra_slink_runtime_resume(struct device *dev)
        |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/spi/spi-tegra20-slink.c:1188:12: error: ‘tegra_slink_runtime_suspend’ defined but not used [-Werror=unused-function]
   1188 | static int tegra_slink_runtime_suspend(struct device *dev)
        |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~

mark the functions __maybe_unused to make the build happy.

This hits the alpha allmodconfig build (and others).

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/spi/spi-tegra20-slink.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 6a726c95ac7a..dc1a6899ba3b 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -1206,7 +1206,7 @@ static int tegra_slink_resume(struct device *dev)
 }
 #endif
 
-static int tegra_slink_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra_slink_runtime_suspend(struct device *dev)
 {
 	struct spi_master *master = dev_get_drvdata(dev);
 	struct tegra_slink_data *tspi = spi_master_get_devdata(master);
@@ -1218,7 +1218,7 @@ static int tegra_slink_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra_slink_runtime_resume(struct device *dev)
+static int __maybe_unused tegra_slink_runtime_resume(struct device *dev)
 {
 	struct spi_master *master = dev_get_drvdata(dev);
 	struct tegra_slink_data *tspi = spi_master_get_devdata(master);
-- 
2.26.2