From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 11 Feb 2014 22:49:24 +0000 (-0500)
Subject: replace checking for ->read/->aio_read presence with check in ->f_mode
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~45^2~44
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f7f25e82d54870df24d415a7007fbd327da027b;p=pandora-kernel.git

replace checking for ->read/->aio_read presence with check in ->f_mode

Since we are about to introduce new methods (read_iter/write_iter), the
tests in a bunch of places would have to grow inconveniently.  Check
once (at open() time) and store results in ->f_mode as FMODE_CAN_READ
and FMODE_CAN_WRITE resp.  It might end up being a temporary measure -
once everything switches from ->aio_{read,write} to ->{read,write}_iter
it might make sense to return to open-coded checks.  We'll see...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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