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Date: Thu, 9 Mar 2017 13:27:06 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@suse.com>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: "mm: fix lazyfree BUG_ON check in try_to_unmap_one()" build
 error
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On Thu, 9 Mar 2017 15:02:26 +0900 Minchan Kim <minchan@kernel.org> wrote:

> Sergey reported VM_WARN_ON_ONCE returns void with !CONFIG_DEBUG_VM
> so we cannot use it as if's condition unlike WARN_ON.

Can we instead fix VM_WARN_ON_ONCE()?