On Tue, Jan 02, 2007 at 01:34:18PM +0100, Jens Axboe wrote:
> On Tue, Jan 02 2007, Christoph Hellwig wrote:
> > This gets a little offtopic for the original issue, so let's cut the Cc
> > list and change the subject.
> > 
> > On Tue, Dec 12, 2006 at 04:21:23PM +0200, Boaz Harrosh wrote:
> > > I'm afraid this might not be enough because of code in 
> > > drivers/ide/ide-cd.c. It does IO off of request->data.
> > 
> > Only for FS requests, but we do BLOCK_PC requests here.
> 
> ->buffer is the old style FS requests, ->data is never used for FS
> requests. BLOCK_PC requests should use just ->data, but I would not be
> surprised if ide-cd and others still map it to ->buffer.

Actually after my last patch BLOCK_PC request should use neither.
Nowdays if a BLOCK_PC requests wants to transfer data it must
use req->bio.

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