linux-kernel - Re: [PATCH 1/6] mm: get_user_pages: consolidate error handling

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Message-ID: <090e5019-b1b9-fdc5-73a1-902164400fe2@nvidia.com>
Date:   Fri, 12 Oct 2018 15:45:05 -0700
From:   John Hubbard <jhubbard@...dia.com>
To:     Balbir Singh <bsingharora@...il.com>
CC:     Matthew Wilcox <willy@...radead.org>,
        Michal Hocko <mhocko@...nel.org>,
        Christopher Lameter <cl@...ux.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Dan Williams <dan.j.williams@...el.com>,
        Jan Kara <jack@...e.cz>, <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rdma <linux-rdma@...r.kernel.org>,
        <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 1/6] mm: get_user_pages: consolidate error handling

On 10/11/18 11:30 PM, Balbir Singh wrote:
> On Thu, Oct 11, 2018 at 11:00:09PM -0700, john.hubbard@...il.com wrote:
>> From: John Hubbard <jhubbard@...dia.com>
>>
>> An upcoming patch requires a way to operate on each page that
>> any of the get_user_pages_*() variants returns.
>>
>> In preparation for that, consolidate the error handling for
>> __get_user_pages(). This provides a single location (the "out:" label)
>> for operating on the collected set of pages that are about to be returned.
>>
>> As long every use of the "ret" variable is being edited, rename
>> "ret" --> "err", so that its name matches its true role.
>> This also gets rid of two shadowed variable declarations, as a
>> tiny beneficial a side effect.
>>
>> Reviewed-by: Jan Kara <jack@...e.cz>
>> Reviewed-by: Andrew Morton <akpm@...ux-foundation.org>
>> Signed-off-by: John Hubbard <jhubbard@...dia.com>
>> ---
> 
> Looks good, might not be needed but
> Reviewed-by: Balbir Singh <bsingharora@...il.com>
> 

Thanks for the review, very good to have another set of eyes on
this one.

-- 
thanks,
John Hubbard
NVIDIA