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perf: Fix parsing of __print_flags() in TP_printk()

commit 49908a1b25d448d68fd26faca260e1850201575f upstream.

A update is made to the sched:sched_switch event that adds some
logic to the first parameter of the __print_flags() that shows the
state of tasks. This change cause perf to fail parsing the flags.

A simple fix is needed to have the parser be able to process ops
within the argument.

Reported-by: Andrew Vagin <>
Signed-off-by: Steven Rostedt <>
Signed-off-by: Greg Kroah-Hartman <>
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1 parent 0b58bf9 commit 923415295307845e614589c1cce62abedd4d1731 Steven Rostedt committed with gregkh Nov 4, 2011
Showing with 2 additions and 0 deletions.
  1. +2 −0 tools/perf/util/trace-event-parse.c
2 tools/perf/util/trace-event-parse.c
@@ -1582,6 +1582,8 @@ process_symbols(struct event *event, struct print_arg *arg, char **tok)
field = malloc_or_die(sizeof(*field));
type = process_arg(event, field, &token);
+ while (type == EVENT_OP)
+ type = process_op(event, field, &token);
if (test_type_token(type, token, EVENT_DELIM, ","))
goto out_free;

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