power: Provide dummy log_suspend_abort_reason() if SUSPEND is disabled

The API to log the suspend reason was introduced with commit 57caa2ad5ce3
("power: Adds functionality to log the last suspend abort reason.").
It is called from functions enabled with PM_SLEEP and from functions
enabled with SUSPEND, but only available if SUSPEND is enabled.
This can result in build failures such as the following if PM_SLEEP
is enabled, but SUSPEND is not.

kernel/built-in.o: In function `try_to_freeze_tasks':
process.c:(.text+0x30928): undefined reference to `log_suspend_abort_reason'
drivers/built-in.o: In function `syscore_suspend':
(.text+0x6e250): undefined reference to `log_suspend_abort_reason'
drivers/built-in.o: In function `__device_suspend':
main.c:(.text+0x7a528): undefined reference to `log_suspend_abort_reason'

Fixes: 57caa2ad5ce3 ("power: Adds functionality to log the last suspend abort reason.")
Signed-off-by: Guenter Roeck <groeck@chromium.org>

diff --git a/include/linux/wakeup_reason.h b/include/linux/wakeup_reason.h
index ad8b76936c7fb70e35f69e4e7327d41d0d7ac8ba..d84d8c301546bb14724ad858b209cebde035cd8d 100644 (file)
--- a/include/linux/wakeup_reason.h
+++ b/include/linux/wakeup_reason.h
@@ -21,7 +21,12 @@
 #define MAX_SUSPEND_ABORT_LEN 256
 
 void log_wakeup_reason(int irq);
-void log_suspend_abort_reason(const char *fmt, ...);
 int check_wakeup_reason(int irq);
 
+#ifdef CONFIG_SUSPEND
+void log_suspend_abort_reason(const char *fmt, ...);
+#else
+static inline void log_suspend_abort_reason(const char *fmt, ...) { }
+#endif
+
 #endif /* _LINUX_WAKEUP_REASON_H */