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-rw-r--r--src/lib/subsys/subsys.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/lib/subsys/subsys.h b/src/lib/subsys/subsys.h
index 7e4fe53636..012b218da7 100644
--- a/src/lib/subsys/subsys.h
+++ b/src/lib/subsys/subsys.h
@@ -43,6 +43,8 @@ typedef struct subsys_fns_t {
*
* This function MUST NOT rely on any runtime configuration information;
* it is only for global state or pre-configuration state.
+ *
+ * This function MUST NOT have any parts that can fail.
**/
int (*initialize)(void);
@@ -60,4 +62,7 @@ typedef struct subsys_fns_t {
} subsys_fns_t;
+#define MIN_SUBSYS_LEVEL -100
+#define MAX_SUBSYS_LEVEL 100
+
#endif