linux-kernel - Re: [PATCH v5 00/14] Add support for MSM's mmio clock/reset controller

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Date:	Fri, 07 Feb 2014 15:36:35 -0800
From:	Frank Rowand <frowand.list@...il.com>
To:	Joe Perches <joe@...ches.com>
CC:	Stephen Boyd <sboyd@...eaurora.org>,
	Mike Turquette <mturquette@...aro.org>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	Saravana Kannan <skannan@...eaurora.org>
Subject: Re: [PATCH v5 00/14] Add support for MSM's mmio clock/reset controller

On 2/7/2014 12:51 PM, Joe Perches wrote:
> On Fri, 2014-02-07 at 11:38 -0800, Frank Rowand wrote:
>> On 2/6/2014 9:11 PM, Joe Perches wrote:
>>> For patch 1, what checkpatch bug might that be?
> []
>> Sorry, it is patch 2, not patch 1 ("[PATCH v5 02/14] clk: Add set_rate_and_parent() op"):
>>
>>    WARNING: Multiple spaces after return type
>>    #188: FILE: include/linux/clk-provider.h:154:
>>    +       int             (*set_rate_and_parent)(struct clk_hw *hw,
>>
>>    total: 0 errors, 1 warnings, 152 lines checked
> 
> Yup, that one might be a bit aggressive.
> 
> It's a complaint about function pointer declaration style.
> 
> from checkpatch:
> ------------------------------------------------------
> # unnecessary space "type  (*funcptr)(args...)"
> 			elsif ($declare =~ /\s{2,}$/) {
> 				WARN("SPACING",
> 				     "Multiple spaces after return type\n" . $herecurr);
> 			}
> ------------------------------------------------------
> 
> This is warning about style equivalent to declarations like:
> 
> int		foo(int bar);
> 
> checkpatch doesn't warn about declarations of that style,
> so likely checkpatch shouldn't warn about multiple spaces
> after a function pointer return type either.
> 
> I don't have a strong opinion one way or another about it.
> 
> If you think it should be silenced, it could be either
> downgraded to a CHK or removed altogether.

OK, now the warning makes sense.  I was reading "spaces" to mean
the space character instead of white space.

I don't have a strong opinion either, but downgrading to a CHK
would be nice.

It would be less confusing to me (though awkward sounding) to
change the message to "Multiple whitespaces after return type".

-Frank
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