linux-kernel - Re: [PATCH] genalloc: Make the avail variable an atomic64

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Message-ID: <88e2c63a-5295-9c1c-9136-eb00c4dc85c4@deltatee.com>
Date:   Wed, 25 Oct 2017 09:47:14 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     sbates@...thlin.com, corbet@....net,
        mathieu.desnoyers@...icios.com, danielmentz@...gle.com,
        akpm@...ux-foundation.org, will.deacon@....com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] genalloc: Make the avail variable an atomic64_t



On 25/10/17 09:32 AM, sbates@...thlin.com wrote:
> From: Stephen Bates <sbates@...thlin.com>
> 
> If the amount of resources allocated to a gen_pool exceeds 2^32 then
> the avail atomic overflows and this causes problems when clients try
> and borrow resources from the pool.
> 
> Add the <linux/atomic.h> header to pull in atomic64 operations on
> platforms that do not support them natively.
> 
> Signed-off-by: Stephen Bates <sbates@...thlin.com>

Reviewed-by: Logan Gunthorpe <logang@...tatee.com>

This looks pretty straightforward to me.

Logan