From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Down <chris@chrisdown.name>
Subject: Re: [PATCH -next] mm/vmscan: fix an undefined behavior for zone id
Date: Mon, 11 Nov 2019 13:14:27 +0000
Message-ID: <20191111131427.GB891635@chrisdown.name>
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To: Qian Cai <cai@lca.pw>
Cc: akpm@linux-foundation.org, mhocko@suse.com, hannes@cmpxchg.org, guro@fb.com, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org

Chris Down writes:
>Ah, I just saw this in my local checkout and thought it was from my 
>changes, until I saw it's also on clean mmots checkout. Thanks for the 
>fixup!

Also, does this mean we should change callers that may pass through 
zone_idx=MAX_NR_ZONES to become MAX_NR_ZONES-1 in a separate commit, then 
remove this interim fixup? I'm worried otherwise we might paper over real 
issues in future.