From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: [PATCH 2/2] vfs: Get rid of duplicate file_ops check in
 do_readv_writev()
Date: Sun, 29 Sep 2013 23:24:53 +0100
Message-ID: <20130929222453.GP13318@ZenIV.linux.org.uk>
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 <1380447470-2811-2-git-send-email-namhyung@kernel.org>
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Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
To: Namhyung Kim <namhyung@kernel.org>
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On Sun, Sep 29, 2013 at 06:37:50PM +0900, Namhyung Kim wrote:
> The file->f_op check in do_readv_writev() is redundant since all of
> its caller (vfs_readv and vfs_writev) already did the check.  The
> same goes to compat_do_readv_writev().

... and the right fix is to kill all those checks completely.  I have that
done in local queue; will push to #for-next tonight.  file->f_op should
never be NULL, period.