diff options
| -rw-r--r-- | trace/ftrace.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/trace/ftrace.c b/trace/ftrace.c index e953922f5b..3588bb0eb4 100644 --- a/trace/ftrace.c +++ b/trace/ftrace.c @@ -51,6 +51,12 @@ bool ftrace_init(void) snprintf(path, PATH_MAX, "%s/tracing/tracing_on", debugfs); trace_fd = open(path, O_WRONLY); if (trace_fd < 0) { + if (errno == EACCES) { + trace_marker_fd = open("/dev/null", O_WRONLY); + if (trace_marker_fd != -1) { + return true; + } + } perror("Could not open ftrace 'tracing_on' file"); return false; } else { |