staging: sw_sync: add stubs for kernels without CONFIG_SW_SYNC

Change-Id: I7a12679eb3c10b1beaf36c6612cf2e3f6662a034
Signed-off-by: Greg Hackmann <ghackmann@google.com>

diff --git a/drivers/staging/android/sw_sync.h b/drivers/staging/android/sw_sync.h
index 585040be5f1828916c648f46670b6be182ed2812..aba25cbb0382070d284cf470939230f306c89d4f 100644 (file)
--- a/drivers/staging/android/sw_sync.h
+++ b/drivers/staging/android/sw_sync.h
@@ -21,6 +21,7 @@
 
 #ifdef __KERNEL__
 
+#include <linux/kconfig.h>
 #include "sync.h"
 
 struct sw_sync_timeline {
@@ -35,10 +36,27 @@ struct sw_sync_pt {
        u32                     value;
 };
 
+#if IS_ENABLED(CONFIG_SW_SYNC)
 struct sw_sync_timeline *sw_sync_timeline_create(const char *name);
 void sw_sync_timeline_inc(struct sw_sync_timeline *obj, u32 inc);
 
 struct sync_pt *sw_sync_pt_create(struct sw_sync_timeline *obj, u32 value);
+#else
+static inline struct sw_sync_timeline *sw_sync_timeline_create(const char *name)
+{
+       return NULL;
+}
+
+static inline void sw_sync_timeline_inc(struct sw_sync_timeline *obj, u32 inc)
+{
+}
+
+static inline struct sync_pt *sw_sync_pt_create(struct sw_sync_timeline *obj,
+               u32 value)
+{
+       return NULL;
+}
+#endif /* IS_ENABLED(CONFIG_SW_SYNC) */
 
 #endif /* __KERNEL __ */