On Tue, Jan 31, 2012 at 06:34:52AM -0500, Christoph Hellwig wrote:

On Tue, Jan 31, 2012 at 06:57:54PM +0800, Wu Fengguang wrote:

quoted

The problem is, there are a dozen of ->direct_IO callback functions.
While there are only two ->direct_IO() callers, one for READ and
another for WRITE, which are much easier to deal with.

So what?  Better do a bit more work now and keep the damn thing
maintainable.

What if we add a wrapper function for doing

        blk_start_plug(&plug);
        ->direct_IO()
        blk_finish_plug(&plug);

Thanks,
Fengguang

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