1 files changed, 5 insertions, 1 deletions

diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 72f5d9e21432..148c178a35aa 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -18,7 +18,7 @@ or
 or
 'perf probe' --line='FUNC[:RLN[+NUM|:RLN2]]|SRC:ALN[+NUM|:ALN2]'
 or
-'perf probe' --vars='PROBEPOINT'
+'perf probe' [--externs] --vars='PROBEPOINT'
 
 DESCRIPTION
 -----------
@@ -64,6 +64,10 @@ OPTIONS
         Show available local variables at given probe point. The argument
         syntax is same as PROBE SYNTAX, but NO ARGs.
 
+--externs::
+        (Only for --vars) Show external defined variables in addition to local
+        variables.
+
 -f::
 --force::
         Forcibly add events with existing name.