STM32: CCM procfs is no longer a part of the 'base' procfs entries and can now only be supported via run time registration with CONFIG_FS_PROCFS_REGISTER=y

arch/arm/src/stm32/Kconfig

@@ -2448,7 +2448,7 @@ config STM32_CCMEXCLUDE
 config STM32_CCM_PROCFS
 	bool "CCM PROCFS support"
 	default n
-	depends on STM32_CCMEXCLUDE && FS_PROCFS
+	depends on !DISABLE_MOUNTPOINT && FS_PROCFS && FS_PROCFS_REGISTER
 	---help---
 		Select to build in support for /proc/ccm.  Reading from /proc/ccm
 		will provide statistics about CCM memory use similar to what you

arch/arm/src/stm32/stm32_ccm.h

@@ -131,6 +131,18 @@ EXTERN struct mm_heap_s g_ccm_heap;
 }
 #endif
 
+/****************************************************************************
+ * Name: ccm_register
+ *
+ * Description:
+ *   Register the CCM procfs file system entry
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_STM32_CCM_PROCFS
+int ccm_register(void);
+#endif
+
 #endif /* __ASSEMBLY__ */
 #endif /* HAVE_CCM_HEAP */
 #endif /* __ARCH_ARM_SRC_STM32_STM32_CCM_H */

arch/arm/src/stm32/stm32_procfs_ccm.c

@@ -64,19 +64,18 @@
 
 #include "stm32_ccm.h"
 
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FS_PROCFS)
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FS_PROCFS) && \
+     defined(CONFIG_FS_PROCFS_REGISTER) && defined(CONFIG_STM32_CCM_PROCFS)
 
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
+
 #define CCM_LINELEN     64
 
 /****************************************************************************
  * Private Types
  ****************************************************************************/
-/* This enumeration identifies all of the thread attributes that can be
- * accessed via the procfs file system.
- */
 
 /* This structure describes one open "file" */
 
@@ -101,10 +100,6 @@ static int     ccm_dup(FAR const struct file *oldp,
                        FAR struct file *newp);
 static int     ccm_stat(FAR const char *relpath, FAR struct stat *buf);
 
-/****************************************************************************
- * Private Variables
- ****************************************************************************/
-
 /****************************************************************************
  * Public Data
  ****************************************************************************/
@@ -128,6 +123,16 @@ const struct procfs_operations ccm_procfsoperations =
   ccm_stat        /* stat */
 };
 
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+const struct procfs_file_s g_procfs_ccm =
+{
+  "ccm",
+  &ccm_procfsoperations
+},
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -314,4 +319,22 @@ static int ccm_stat(const char *relpath, struct stat *buf)
   return OK;
 }
 
-#endif /* !CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_PROCFS */
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: ccm_register
+ *
+ * Description:
+ *   Register the CCM procfs file system entry
+ *
+ ****************************************************************************/
+
+int ccm_register(void)
+{
+  return procfs_register(&g_procfs_ccm);
+}
+
+#endif /* !CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_PROCFS &&
+        * CONFIG_FS_PROCFS_REGISTER && CONFIG_STM32_CCM_PROCFS */