2 files changed, 5 insertions, 1 deletions

diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index e36ed4dd3868..441324f2615d 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -87,7 +87,7 @@ Each probe argument follows below syntax.
 
  [NAME=]LOCALVAR|$retval|%REG|@SYMBOL
 
-'NAME' specifies the name of this argument (optional). You can use the name of local variable, local data structure member (e.g. var->field, var.field2), or kprobe-tracer argument format (e.g. $retval, %ax, etc).
+'NAME' specifies the name of this argument (optional). You can use the name of local variable, local data structure member (e.g. var->field, var.field2), or kprobe-tracer argument format (e.g. $retval, %ax, etc). Note that the name of this argument will be set as the last member name if you specify a local data structure member (e.g. field2 for 'var->field1.field2'.)
 
 LINE SYNTAX
 -----------
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index ab6f53deabad..19de8b77973d 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -481,6 +481,10 @@ static void parse_perf_probe_arg(const char *str, struct perf_probe_arg *arg)
         } while (tmp);
         (*fieldp)->name = xstrdup(str);
         pr_debug("%s(%d)\n", (*fieldp)->name, (*fieldp)->ref);
+
+        /* If no name is specified, set the last field name */
+        if (!arg->name)
+                arg->name = xstrdup((*fieldp)->name);
 }
 
 /* Parse perf-probe event command */