MLK-11566-5 drvier: imx_sema4: add dummy function

When CONFIG_IMX_SEMA4 is NOT set, some modules may
still call SEMA4 APIs, need to add dummy function
to make sure build pass.

Signed-off-by: Anson Huang <b20788@freescale.com>
(cherry picked from commit 5a2537095621da25c8967a0ccdbb8b0029e14c94)

diff --git a/include/linux/imx_sema4.h b/include/linux/imx_sema4.h
index 83f319f..fe48089 100644 (file)
--- a/include/linux/imx_sema4.h
+++ b/include/linux/imx_sema4.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -57,8 +57,27 @@ struct imx_sema4_mutex_device {
 
 struct imx_sema4_mutex *
        imx_sema4_mutex_create(u32 dev_num, u32 mutex_num);
+#ifdef CONFIG_IMX_SEMA4
 int imx_sema4_mutex_destroy(struct imx_sema4_mutex *mutex_ptr);
 int imx_sema4_mutex_trylock(struct imx_sema4_mutex *mutex_ptr);
 int imx_sema4_mutex_lock(struct imx_sema4_mutex *mutex_ptr);
 int imx_sema4_mutex_unlock(struct imx_sema4_mutex *mutex_ptr);
+#else
+static inline int imx_sema4_mutex_destroy(struct imx_sema4_mutex *mutex_ptr)
+{
+       return 0;
+}
+static inline int imx_sema4_mutex_trylock(struct imx_sema4_mutex *mutex_ptr)
+{
+       return 0;
+}
+static inline int imx_sema4_mutex_lock(struct imx_sema4_mutex *mutex_ptr)
+{
+       return 0;
+}
+static inline int imx_sema4_mutex_unlock(struct imx_sema4_mutex *mutex_ptr)
+{
+       return 0;
+}
+#endif
 #endif /* __LINUX_IMX_SEMA4_H__ */