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Re: bio_add_page rw mode check by merge_bvec_fn

To: Bernd Schubert <bernd.schubert@xxxxxxxxxxxxxxxxxx>
Subject: Re: bio_add_page rw mode check by merge_bvec_fn
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Fri, 22 Nov 2013 07:36:18 -0800
Cc: "linux-fsdevel@xxxxxxxxxxxxxxx" <linux-fsdevel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, NeilBrown <neilb@xxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Kent Overstreet <kmo@xxxxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <528E4C19.70507@xxxxxxxxxxxxxxxxxx>
References: <528E4A50.7040609@xxxxxxxxxxxxxxxxxx> <528E4C19.70507@xxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
While this is trivial to fix it's also fairly unexpected and easy
to get wrong for new callers.  Neil, can you explain why you
desperately need it?

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