--- zzzz-none-000/linux-3.10.107/include/clocksource/samsung_pwm.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/clocksource/samsung_pwm.h	2021-02-04 17:41:59.000000000 +0000
@@ -20,7 +20,14 @@
 
 #define SAMSUNG_PWM_NUM		5
 
+/*
+ * Following declaration must be in an ifdef due to this symbol being static
+ * in pwm-samsung driver if the clocksource driver is not compiled in and the
+ * spinlock is not shared between both drivers.
+ */
+#ifdef CONFIG_CLKSRC_SAMSUNG_PWM
 extern spinlock_t samsung_pwm_lock;
+#endif
 
 struct samsung_pwm_variant {
 	u8 bits;