Re: [PATCH v2 2/3] dt-bindings: wire style checker into dt_binding_check

[Nathan Chancellor <nathan@kernel.org>]

On Wed, May 06, 2026 at 01:44:47PM -0500, Rob Herring wrote:
> On Wed, Apr 29, 2026 at 03:21:33PM +0100, Daniel Golle wrote:
> > diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
> > index 7b668f7fd400..35ddd0b7a349 100644
> > --- a/Documentation/devicetree/bindings/Makefile
> > +++ b/Documentation/devicetree/bindings/Makefile
> > @@ -46,6 +46,19 @@ quiet_cmd_chk_bindings = CHKDT   $(src)
> >  			  xargs -n200 -P$$(nproc) $(DT_DOC_CHECKER) -u $(src)) \
> >  			  && touch $@ || true
> >  
> > +DT_CHK_STYLE = $(srctree)/scripts/dtc/dt-check-style
> > +
> > +# Feed the file list to the checker via @argfile in a single Python
> > +# process so the ruamel.yaml import is paid once. scripts/jobserver-exec
> > +# claims slots from the GNU make jobserver and exposes the count via
> > +# $PARALLELISM, which dt-check-style picks up to size its worker pool.
> > +quiet_cmd_chk_style = STYLE   $(src)
> > +      cmd_chk_style = f=$$(mktemp) && $(find_cmd) > $$f && \
> > +		      $(PYTHON3) $(srctree)/scripts/jobserver-exec \
> > +		      $(PYTHON3) $(DT_CHK_STYLE) @$$f; \
> 
> What's the reason to run via PYTHON3 vs. running dt-check-style 
> directly? It's just different from the rest of this makefile.

In general, scripts should be called with an explicit interpreter to

1. not rely on the file being executable (I think quilt has issues with
this at times?)

2. respect the user's choice of interpreter (if they have specified one)

See "Script invocation" in Documentation/kbuild/makefiles.rst.

-- 
Cheers,
Nathan