Subject: Re: [PATCH 02/10] KVM: x86: MMU: Add helper function to clear a bit
 in unsync child bitmap
To: Xiao Guangrong <guangrong.xiao@linux.intel.com>, pbonzini@redhat.com
References: <20151112204849.ba920599a8426d7196a0df73@lab.ntt.co.jp>
 <20151112205019.611e8216adebb465b689876e@lab.ntt.co.jp>
 <564BE628.1050705@linux.intel.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
From: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Message-ID: <564D1EF7.4000707@lab.ntt.co.jp>
Date: Thu, 19 Nov 2015 09:59:35 +0900
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On 2015/11/18 11:44, Xiao Guangrong wrote:

> On 11/12/2015 07:50 PM, Takuya Yoshikawa wrote:
>> +            if (!ret) {
>> +                clear_unsync_child_bit(sp, i);
>> +                continue;
>> +            } else if (ret > 0) {
>>                   nr_unsync_leaf += ret;
>
> Just a single line here, braces are unnecessary.
>
>> -            else
>> +            } else
>>                   return ret;

I know we can eliminate the braces, but that does not mean
we should do so: there seems to be no consensus about this
style issue and checkpatch accepts both ways.

Actually, some people prefer to put braces when one of the
if/else-if/else cases has multiple lines.  You can see
some examples in kernel/sched/core.c: see hrtick_start(),
sched_fork(), free_sched_domain().

In our case, I thought putting braces would align the else-if
and else and make the code look a bit nicer, but I know this
may be just a matter of personal feeling.

In short, unless the maintainer, Paolo for this file, has any
preference, both ways will be accepted.

   Takuya

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