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Date: Sat, 10 Mar 2018 01:42:22 +0300
From: Alexey Dobriyan <adobriyan@gmail.com>
Subject: Re: [PATCH 12/25] slub: make ->reserved unsigned int
Message-ID: <20180309224222.GD3843@avx2>
References: <20180305200730.15812-1-adobriyan@gmail.com>
 <20180305200730.15812-12-adobriyan@gmail.com>
 <20180306184508.GA11216@bombadil.infradead.org>
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To: Matthew Wilcox <willy@infradead.org>
Cc: akpm@linux-foundation.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, linux-mm@kvack.org

On Tue, Mar 06, 2018 at 10:45:08AM -0800, Matthew Wilcox wrote:
> On Mon, Mar 05, 2018 at 11:07:17PM +0300, Alexey Dobriyan wrote:
> > ->reserved is either 0 or sizeof(struct rcu_head), can't be negative.
> 
> Maybe make it unsigned char instead of unsigned int in case there's
> anything else that could use the space?

Lokks like nothing except ->red_left_pad qualifies for uint8_t.