* Ramkumar Ramachandra <[email protected]> wrote:
> + /* Perform a quick sanity check */
> + if (!is_valid_tracepoint("power:cpu_frequency")) {
> + fprintf(stderr, "Error:\tNo permissions to read
> $debugfs/tracing/events/power/cpu_frequency\n");
> + fprintf(stderr, "Hint:\tChange the permissions of debugfs:
> /sys/kernel/debug\n");
> + fprintf(stderr, "\tThe directory will be present if your kernel
> was compiled with debugfs support.\n");
Is missing permissions the only way how is_valid_tracepoint() can fail?
What if debugfs has the right permissions but CONFIG_TRACEPOINTS is
disabled in the kernel?
Thanks,
Ingo
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