From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julia Lawall <julia.lawall@lip6.fr>
Subject: Re: [kbuild-all] [PATCH] OPTIONAL: cpufreq/intel_pstate: fix
 debugfs_simple_attr.cocci warnings
Date: Thu, 29 Mar 2018 21:44:02 +0200 (CEST)
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To: Fabio Estevam <festevam@gmail.com>
Cc: Francisco Jerez <currojerez@riseup.net>, linux-pm@vger.kernel.org, Viresh Kumar <viresh.kumar@linaro.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, linux-kernel <linux-kernel@vger.kernel.org>, kbuild-all@01.org, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>, 0day robot <fengguang.wu@intel.com>, Len Brown <lenb@kernel.org>, Nicolai Stange <nstange@suse.de>
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On Thu, 29 Mar 2018, Fabio Estevam wrote:

> Hi Julia,
>
> On Thu, Mar 29, 2018 at 4:12 PM, Julia Lawall <julia.lawall@lip6.fr> wrote:
> >  Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
> >  for debugfs files.
> >
> > Semantic patch information:
> >  Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
> >  imposes some significant overhead as compared to
> >  DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().
>
> Just curious: could you please expand on what "imposes some
> significant overhead" means?

I don't know.  I didn't write this rule.  Nicolai, can you explain?

thanks,
julia