Re: [PATCH 1/2] PM: base: power: don't try to use non-existing RTC for storing data

In there is no legacy RTC device, don't try to use it for storing trace
data across suspend/resume.

Cc: <redacted>
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 drivers/base/power/trace.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c
index a97f33d0c59f..b7c80849455c 100644
--- a/drivers/base/power/trace.c
+++ b/drivers/base/power/trace.c

@@ -13,6 +13,7 @@
 #include <linux/export.h>
 #include <linux/rtc.h>
 #include <linux/suspend.h>
+#include <linux/init.h>
 
 #include <linux/mc146818rtc.h>
 

@@ -165,6 +166,9 @@ void generate_pm_trace(const void *tracedata, unsigned int user)
 	const char *file = *(const char **)(tracedata + 2);
 	unsigned int user_hash_value, file_hash_value;
 
+	if (!x86_platform.legacy.rtc)
+		return 0;