linux-kernel - Re: [PATCH] mm/vmscan: remove prefetch_prev_lru

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Date:   Wed, 15 Jan 2020 00:29:47 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Qian Cai <cai@....pw>
Cc:     Alex Shi <alex.shi@...ux.alibaba.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/vmscan: remove prefetch_prev_lru_page

On Tue, Jan 14, 2020 at 08:46:21AM -0500, Qian Cai wrote:
> 
> 
> > On Jan 14, 2020, at 7:55 AM, Alex Shi <alex.shi@...ux.alibaba.com> wrote:
> > 
> > This macro are never used in git history. So better to remove.
> 
> When removing unused thingy, it is important to figure out which commit introduced it in the first place and Cc the relevant people in that commit.

No, it isn't.  It is at best nice to have, but for a trivial macro
really doesn't matter.