linux-kernel - Re: [PATCH v3 1/1] Introduce Intel RAPL cooling device driver

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Date:	Tue, 09 Apr 2013 09:26:55 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Platform Driver <platform-driver-x86@...r.kernel.org>,
	Matthew Garrett <matthew.garrett@...ula.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Rafael Wysocki <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [PATCH v3 1/1] Introduce Intel RAPL cooling device driver

On Tue, 2013-04-09 at 09:15 -0700, Jacob Pan wrote:
> On Tue, 9 Apr 2013 08:26:38 -0700
> Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> > > +	if (NULL == rp->name || rp->flag & RAPL_PRIMITIVE_DUMMY)
> > 
> > In Linux we do (rp->name == NULL), or even better yet (!rp->name),
> > please fix that up here and elsewhere in the driver.
> > 
> I can fix that. I did that because checkpatch does not complain about
> it. also it avoids common mistake as:
> rp->name = NULL
> 
> > > +
> > > +#define PRIMITIVE_INFO_INIT(p, m, s, i, u, f) {#p, m, s, i, u, p,
> > > f}
> > 
> > C has named initializers, use them please.
> > 
> this macro can save lots of repeated text.

Use the macro.  Use named initializers in the macro.

#define PRIMITIVE_INFO_INIT(p, m, s, i, u, f)	\
{						\
	.name = #p,				\
	.mask = m,				\
	.shift = s,				\
	.id = i,				\
	.unit = u,				\
/*						\
(hmm looks like a bug ?)			\
	enum rapl_primitives pm_id;		\
*/						\
	.flag = f,				\
}


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