linux-ext4 - Re: [PATCH v4 1/8] ext4: move out iomap field population into separate helper

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Message-Id: <20191009075018.8BA0A4203F@d06av24.portsmouth.uk.ibm.com>
Date:   Wed, 9 Oct 2019 13:20:17 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Matthew Bobrowski <mbobrowski@...browski.org>, tytso@....edu,
        jack@...e.cz, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, david@...morbit.com,
        darrick.wong@...cle.com
Subject: Re: [PATCH v4 1/8] ext4: move out iomap field population into
 separate helper



On 10/9/19 12:37 PM, Christoph Hellwig wrote:
> On Wed, Oct 09, 2019 at 11:32:54AM +0530, Ritesh Harjani wrote:
>> We can also get rid of "first_block" argument here.
> 
> That would just duplicate filling it out in all callers, so why?
> 

What I meant is "first_block" is same as map->m_lblk.
(unless ext4_map_blocks can change map->m_lblk, which AFAICT, it should
not).
So why pass an extra argument when we are already passing 'map'
structure.
So we can fill iomap->offset using map->m_lblk in ext4_set_iomap()
function.

-ritesh