On Mon, 2011-12-05 at 18:22 +0100, Jiri Olsa wrote:
> Currently the ftrace_set_filter and ftrace_set_notrace functions
> do not return any return code. So there's no way for ftrace_ops
> user to tell wether the filter was correctly applied.
> 
> The set_ftrace_filter interface returns error in case the filter
> did not match:
> 
>   # echo krava > set_ftrace_filter
>   bash: echo: write error: Invalid argument
> 
> Changing both ftrace_set_filter and ftrace_set_notrace functions
> to return zero if the filter was applied correctly or -E* values
> in case of error.

This looks like a proper fix. Move this to the front of the patch set,
as this and patch 1 can go into ftrace now as fixes.

-- Steve

> 
> Signed-off-by: Jiri Olsa <jolsa@redhat.com>