tracing/syscalls: Fix the output of syscalls with no arguments
Before:
# echo 1 > events/syscalls/sys_enter_sync/enable
# cat events/syscalls/sys_enter_sync/format
...
field:int nr; offset:12; size:4;
print fmt: "# sync
# cat trace
...
sync-8950 [000] 2366.087670: sys_sync(
After:
# echo 1 > events/syscalls/sys_enter_sync/enable
# cat events/syscalls/sys_enter_sync/format
...
field:int nr; offset:12; size:4;
print fmt: ""
# sync
# cat trace
sync-2134 [001] 136.780735: sys_sync()
Reported-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
LKML-Reference: <4A8D05AF.20103@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
1 file changed