tools lib fs: Pass filename to debugfs__strerror_open

It was hardcoded for one specific tracepoint, leftover from its initial
user: 'perf trace'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-j1jicvwljy5qx1nah4mkmyke@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 2f82dd7..684609d 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2056,7 +2056,7 @@
 	if (trace->trace_syscalls &&
 	    perf_evlist__add_syscall_newtp(evlist, trace__sys_enter,
 					   trace__sys_exit))
-		goto out_error_tp;
+		goto out_error_raw_syscalls;
 
 	if (trace->trace_syscalls)
 		perf_evlist__add_vfs_getname(evlist);
@@ -2210,7 +2210,8 @@
 	char errbuf[BUFSIZ];
 
 out_error_tp:
-	debugfs__strerror_open(errno, errbuf, sizeof(errbuf));
+out_error_raw_syscalls:
+	debugfs__strerror_open(errno, errbuf, sizeof(errbuf), "tracing/events/raw_syscalls");
 	goto out_error;
 
 out_error_mmap: