linux-kernel - Re: "mm: fix lazyfree BUG_ON check in try_to_unmap

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Message-Id: <20170309132706.1cb4fc7d2e846923eedf788c@linux-foundation.org>
Date:   Thu, 9 Mar 2017 13:27:06 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Minchan Kim <minchan@...nel.org>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...e.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: "mm: fix lazyfree BUG_ON check in try_to_unmap_one()" build
 error

On Thu, 9 Mar 2017 15:02:26 +0900 Minchan Kim <minchan@...nel.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()?