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Date:   Fri, 19 Oct 2018 08:28:01 +0000
From:   Wei Yang <richard.weiyang@gmail.com>
To:     Pavel Tatashin <pasha.tatashin@gmail.com>
Cc:     penghao122@sina.com.cn,
        Linux Memory Management List <linux-mm@kvack.org>,
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        pasha.tatashin@oracle.com, osalvador@suse.de,
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Subject: Re: [PATCH] mm/sparse: remove a check that compare if unsigned
 variable is negative
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On Sat, Oct 13, 2018 at 01:04:45PM -0400, Pavel Tatashin wrote:
>This is incorrect: next_present_section_nr() returns "int" and -1 no
>next section, this change would lead to infinite loop.

Yes, the -1 is a very special value.

-- 
Wei Yang
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