linux-kernel - Re: [PATCH 1/7] genalloc: track beginning of allocations

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Message-ID: <98df3380-a142-871e-5a18-b356088e33ea@huawei.com>
Date:   Wed, 7 Mar 2018 17:46:53 +0200
From:   Igor Stoppa <igor.stoppa@...wei.com>
To:     Mike Rapoport <rppt@...ux.vnet.ibm.com>
CC:     <david@...morbit.com>, <willy@...radead.org>,
        <keescook@...omium.org>, <mhocko@...nel.org>, <labbott@...hat.com>,
        <linux-security-module@...r.kernel.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>,
        <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH 1/7] genalloc: track beginning of allocations



On 07/03/18 16:48, Igor Stoppa wrote:
> 
> 
> On 06/03/18 15:19, Mike Rapoport wrote:
>> On Wed, Feb 28, 2018 at 10:06:14PM +0200, Igor Stoppa wrote:

[...]

>>> + * get_boundary() - verifies address, then measure length.
>>
>> There's some lack of consistency between the name and implementation and
>> the description.
>> It seems that it would be simpler to actually make it get_length() and
>> return the length of the allocation or nentries if the latter is smaller.
>> Then in gen_pool_free() there will be no need to recalculate nentries
>> again.
> 
> There is an error in the documentation. I'll explain below.

Argh, I do not know why I came out with that.

Yes, your comment is correct. I've modified the function accordingly and
it is simpler.

I will post it in the next revision.

--
igor