The newly added driver guards its "resume" callback with an #ifdef CONFIG_PM
that should be CONFIG_PM_SLEEP instead, leading to a warning in some 
configurations:

drivers/platform/x86/surface3-wmi.c:248:12: error: 's3_wmi_resume' defined but 
not used [-Werror=unused-function]

Using a __maybe_unused annotation without an #ifdef avoids the mistake more
reliably.

Fixes: 3dda3b3798f9 ("platform/x86: Add custom surface3 platform device for 
controlling LID")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 drivers/platform/x86/surface3-wmi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/platform/x86/surface3-wmi.c 
b/drivers/platform/x86/surface3-wmi.c
index cbf4d83a7271..6ac1d1349d7e 100644
--- a/drivers/platform/x86/surface3-wmi.c
+++ b/drivers/platform/x86/surface3-wmi.c
@@ -244,13 +244,11 @@ static int s3_wmi_remove(struct platform_device *device)
        return 0;
 }
 
-#ifdef CONFIG_PM
-static int s3_wmi_resume(struct device *dev)
+static int __maybe_unused s3_wmi_resume(struct device *dev)
 {
        s3_wmi_send_lid_state();
        return 0;
 }
-#endif
 static SIMPLE_DEV_PM_OPS(s3_wmi_pm, NULL, s3_wmi_resume);
 
 static struct platform_driver s3_wmi_driver = {
-- 
2.9.0

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