X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=include%2Flttng%2Fust-events.h;h=b050d30ec03af5d0b435f27dae85a0c71a5d16b5;hb=73d37531c6b12d24086681e636fae8cf0375d2dd;hp=54eb09550ce4000bd20855c0e40f254960ad19cb;hpb=218deb69baab57ee2f6728eef18e84697f21197b;p=lttng-ust.git

diff --git a/include/lttng/ust-events.h b/include/lttng/ust-events.h
index 54eb0955..b050d30e 100644
--- a/include/lttng/ust-events.h
+++ b/include/lttng/ust-events.h
@@ -459,6 +459,12 @@ enum lttng_filter_ret {
 	/* Other bits are kept for future use. */
 };
 
+/*
+ * This structure is used in the probes. More specifically, the `filter` and
+ * `node` fields are explicity used in the probes. When modifying this
+ * structure we must not change the layout of these two fields as it is
+ * considered ABI.
+ */
 struct lttng_bytecode_runtime {
 	/* Associated bytecode */
 	struct lttng_ust_filter_bytecode_node *bc;