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-rw-r--r--kernel/trace/trace.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 7d5c63dd410a..4097cd3763f7 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3837,7 +3837,7 @@ static const char readme_msg[] =
"\t [:values=<field1[,field2,...]>]\n"
"\t [:sort=<field1[,field2,...]>]\n"
"\t [:size=#entries]\n"
- "\t [:pause][:continue]\n"
+ "\t [:pause][:continue][:clear]\n"
"\t [if <filter>]\n\n"
"\t When a matching event is hit, an entry is added to a hash\n"
"\t table using the key(s) and value(s) named, and the value of a\n"
@@ -3857,6 +3857,9 @@ static const char readme_msg[] =
"\t trigger or to start a hist trigger but not log any events\n"
"\t until told to do so. 'continue' can be used to start or\n"
"\t restart a paused hist trigger.\n\n"
+ "\t The 'clear' parameter will clear the contents of a running\n"
+ "\t hist trigger and leave its current paused/active state\n"
+ "\t unchanged.\n\n"
#endif
;