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Message-ID: <alpine.LSU.2.11.2101061213540.2492@eggly.anvils>
Date:   Wed, 6 Jan 2021 12:18:36 -0800 (PST)
From:   Hugh Dickins <hughd@...gle.com>
To:     Andrea Arcangeli <aarcange@...hat.com>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>,
        Alex Shi <alex.shi@...ux.alibaba.com>,
        Minchan Kim <minchan@...nel.org>,
        Michal Hocko <mhocko@...e.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/mmap: replace if (cond) BUG() with BUG_ON()

On Wed, 6 Jan 2021, Andrea Arcangeli wrote:
> 
> I'd be surprised if the kernel can boot with BUG_ON() defined as "do
> {}while(0)" so I guess it doesn't make any difference.

I had been afraid of that too, when CONFIG_BUG is not set:
but I think it's actually "if (cond) do {} while (0)".

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