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From: David Howells <dhowells@redhat.com>
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References: <15961.1368438077@warthog.procyon.org.uk> <1368293689-16410-3-git-send-email-jiang.liu@huawei.com> <1368293689-16410-1-git-send-email-jiang.liu@huawei.com>
Cc: dhowells@redhat.com, Jiang Liu <liuj97@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Jiang Liu <jiang.liu@huawei.com>, David Rientjes <rientjes@google.com>,
        Wen Congyang <wency@cn.fujitsu.com>, Mel Gorman <mgorman@suse.de>,
        Minchan Kim <minchan@kernel.org>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        Michal Hocko <mhocko@suse.cz>,
        James Bottomley <James.Bottomley@HansenPartnership.com>,
        Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
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        linux-mm@kvack.org, linux-arch@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Geert Uytterhoeven <geert@linux-m68k.org>
Subject: Re: [PATCH v6, part3 02/16] mm: enhance free_reserved_area() to support poisoning memory with zero
Date: Mon, 13 May 2013 10:42:37 +0100
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David Howells <dhowells@redhat.com> wrote:

> Jiang Liu <liuj97@gmail.com> wrote:
> 
> > +	free_reserved_area((void *)start, (void *)end, -1, "initrd");
> 
> Do you mean -1 or ULONG_MAX?

No matter...  It's a poison value, not an address.

David