linux-kernel - [PATCH] mfd: intel-lpss: hide suspend/resume functions in #ifdef

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Message-Id: <20230516202746.561111-1-arnd@kernel.org>
Date:   Tue, 16 May 2023 22:27:42 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Lee Jones <lee@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: [PATCH] mfd: intel-lpss: hide suspend/resume functions in #ifdef

From: Arnd Bergmann <arnd@...db.de>

When CONFIG_PM is disabled, the prototypes for these two functions
are not visible:

drivers/mfd/intel-lpss.c:482:5: error: no previous prototype for 'intel_lpss_suspend' [-Werror=missing-prototypes]
  482 | int intel_lpss_suspend(struct device *dev)
      |     ^~~~~~~~~~~~~~~~~~
drivers/mfd/intel-lpss.c:503:5: error: no previous prototype for 'intel_lpss_resume' [-Werror=missing-prototypes]
  503 | int intel_lpss_resume(struct device *dev)

Add the same #ifdef around the definition of the unused functions,
which avoids the warning and slightly reduces the code size.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/mfd/intel-lpss.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
index cfbee2cfba6b..9591b354072a 100644
--- a/drivers/mfd/intel-lpss.c
+++ b/drivers/mfd/intel-lpss.c
@@ -460,6 +460,7 @@ void intel_lpss_remove(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(intel_lpss_remove);
 
+#ifdef CONFIG_PM
 static int resume_lpss_device(struct device *dev, void *data)
 {
 	if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND))
@@ -514,6 +515,7 @@ int intel_lpss_resume(struct device *dev)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(intel_lpss_resume);
+#endif
 
 static int __init intel_lpss_init(void)
 {
-- 
2.39.2