On Fri, 19 Feb 2021 07:53:53 +0200
"Tzvetomir Stoyanov (VMware)" <tz.stoyanov@xxxxxxxxx> wrote:
> +/**
> + * tracefs_trace_marker_get_fd - Get a file descriptor of "trace_marker" in
> + * given instance
> + * @instance: ftrace instance, can be NULL for the top instance
> + *
> + * Returns -1 in case of an error, or a valid file descriptor to "trace_marker"
> + * file for reading and writing. The returned FD must be closed with close().
> + */
> +static inline int tracefs_trace_marker_get_fd(struct tracefs_instance *instance)
> +{
> + return tracefs_instance_file_open(instance, "trace_marker", O_RDWR);
And this should be opened with "O_WRONLY", as trace_marker can't be read.
-- Steve
> +}
> +
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