diff options
Diffstat (limited to 'trace/ftrace.c')
| -rw-r--r-- | trace/ftrace.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/trace/ftrace.c b/trace/ftrace.c index 213cb2205f..61692a8682 100644 --- a/trace/ftrace.c +++ b/trace/ftrace.c @@ -42,12 +42,18 @@ bool ftrace_init(void) { char mount_point[PATH_MAX]; char path[PATH_MAX]; - int debugfs_found; + int tracefs_found; int trace_fd = -1; + const char *subdir = ""; - debugfs_found = find_mount(mount_point, "debugfs"); - if (debugfs_found) { - snprintf(path, PATH_MAX, "%s/tracing/tracing_on", mount_point); + tracefs_found = find_mount(mount_point, "tracefs"); + if (!tracefs_found) { + tracefs_found = find_mount(mount_point, "debugfs"); + subdir = "/tracing"; + } + + if (tracefs_found) { + snprintf(path, PATH_MAX, "%s%s/tracing_on", mount_point, subdir); trace_fd = open(path, O_WRONLY); if (trace_fd < 0) { if (errno == EACCES) { @@ -66,14 +72,14 @@ bool ftrace_init(void) } close(trace_fd); } - snprintf(path, PATH_MAX, "%s/tracing/trace_marker", mount_point); + snprintf(path, PATH_MAX, "%s%s/trace_marker", mount_point, subdir); trace_marker_fd = open(path, O_WRONLY); if (trace_marker_fd < 0) { perror("Could not open ftrace 'trace_marker' file"); return false; } } else { - fprintf(stderr, "debugfs is not mounted\n"); + fprintf(stderr, "tracefs is not mounted\n"); return false; } |