linux-kernel - Re: [PATCH 04/11] ext4: Add ext4_get_block

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Message-ID: <20150805020357.GA3902@dastard>
Date:	Wed, 5 Aug 2015 12:03:57 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Matthew Wilcox <matthew.r.wilcox@...el.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Matthew Wilcox <willy@...ux.intel.com>
Subject: Re: [PATCH 04/11] ext4: Add ext4_get_block_dax()

On Tue, Aug 04, 2015 at 03:57:58PM -0400, Matthew Wilcox wrote:
> From: Matthew Wilcox <willy@...ux.intel.com>
> 
> DAX wants different semantics from any currently-existing ext4
> get_block callback.  Unlike ext4_get_block_write(), it needs to honour
> the 'create' flag, and unlike ext4_get_block(), it needs to be able
> to return unwritten extents.  So introduce a new ext4_get_block_dax()
> which has those semantics.  We could also change ext4_get_block_write()
> to honour the 'create' flag, but that might have consequences on other
> users that I do not currently understand.
> 
> Signed-off-by: Matthew Wilcox <willy@...ux.intel.com>

Doesn't this make the first patch in the series redundant?

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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