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Date: Tue, 13 Mar 2012 14:36:54 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: linux-mm@kvack.org, mgorman@suse.de, kamezawa.hiroyu@jp.fujitsu.com,
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Subject: Re: [PATCH -V3 3/8] hugetlb: add charge/uncharge calls for HugeTLB
 alloc/free
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On Tue, 13 Mar 2012 12:37:07 +0530
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> wrote:

> +		return ERR_PTR(-VM_FAULT_SIGBUS);

whee, so we have (ab)used the err.h infrastructure to carry
VM_FAULT_foo codes, thus creating a secret requirement that the
VM_FAULT_foo values not exceed MAX_ERRNO.

What a hack, whodidthat?