linux-ext4 - Re: [PATCH 1/1] mm/block: convert rw

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Date:	Fri, 5 Aug 2016 00:57:56 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Mike Christie <mchristi@...hat.com>
Cc:	ross.zwisler@...ux.intel.com, linux-ext4@...r.kernel.org,
	linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	david@...morbit.com, minchan@...nel.org, ngupta@...are.org,
	vishal.l.verma@...el.com, axboe@...nel.dk
Subject: Re: [PATCH 1/1] mm/block: convert rw_page users to bio op use

> 
> The rw_page users were not converted to use bio/req ops. As a result
> bdev_write_page is not passing down REQ_OP_WRITE and the IOs will
> be sent down as reads.

Can we just get rid of REQ_OP_WRITE enum for the ->rw_page interface
and pass a 'bool write'?  If not I'd prefer to avoid using op_is_write
as much as possible - it's a confusing interface if we really want
to do a switch on read vs write vs invalid.
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