linux-ext4 - Re: bio_add_page rw mode check by merge_bvec

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Message-ID: <20131122153618.GB15143@infradead.org>
Date:	Fri, 22 Nov 2013 07:36:18 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Bernd Schubert <bernd.schubert@...m.fraunhofer.de>
Cc:	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	xfs@....sgi.com, linux-ext4@...r.kernel.org,
	NeilBrown <neilb@...e.de>, Jens Axboe <axboe@...nel.dk>,
	Kent Overstreet <kmo@...erainc.com>
Subject: Re: bio_add_page rw mode check by merge_bvec_fn

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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