Re: [PATCH bpf-next 1/2] bpf: use canonical ftrace path

[Ross Zwisler]

On Mon, Feb 13, 2023 at 06:57:16PM -0800, Stanislav Fomichev wrote:
> On 02/13, Ross Zwisler wrote:
> > The canonical location for the tracefs filesystem is at
> > /sys/kernel/tracing.
> 
> > But, from Documentation/trace/ftrace.rst:
> 
> >    Before 4.1, all ftrace tracing control files were within the debugfs
> >    file system, which is typically located at /sys/kernel/debug/tracing.
> >    For backward compatibility, when mounting the debugfs file system,
> >    the tracefs file system will be automatically mounted at:
> 
> >    /sys/kernel/debug/tracing
> 
> > Many comments and samples in the bpf code still refer to this older
> > debugfs path, so let's update them to avoid confusion.  There are a few
> > spots where the bpf code explicitly checks both tracefs and debugfs
> > (tools/bpf/bpftool/tracelog.c and tools/lib/api/fs/fs.c) and I've left
> > those alone so that the tools can continue to work with both paths.
> 
> Doesn't seem to apply cleanly to bpf-next?
> 
> https://github.com/kernel-patches/bpf/pull/4584

Oh, apologies, I was using Linus's master branch as my baseline.
I'll send out a v2.