Re: [2.6 patch] drivers/scsi/nsp32.c: remove kernel 2.4 code
From: James Bottomley
Date: Thu Apr 26 2007 - 20:32:35 EST
On Fri, 2007-04-27 at 02:13 +0200, Adrian Bunk wrote:
> On Thu, Apr 26, 2007 at 07:59:57PM -0400, Robert P. J. Day wrote:
> > On Fri, 27 Apr 2007, Adrian Bunk wrote:
> > > This patch removes kernel 2.4 code.
> > >
> > > Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
> > >
> > > ---
> > >
> > > This patch has been sent on:
> > > - 26 Mar 2007
> > >
> > > drivers/scsi/nsp32.c | 109 +++++--------------------------------------
> > > 1 file changed, 13 insertions(+), 96 deletions(-)
> > >
> > > --- linux-2.6.21-rc4-mm1/drivers/scsi/nsp32.c.old 2007-03-25 20:27:34.000000000 +0200
> > > +++ linux-2.6.21-rc4-mm1/drivers/scsi/nsp32.c 2007-03-25 20:31:59.000000000 +0200
> > > @@ -49,10 +49,6 @@
> > > #include <scsi/scsi_host.h>
> > > #include <scsi/scsi_ioctl.h>
> > >
> > > -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
> > > -# include <linux/blk.h>
> > > -#endif
> > > -
> > i'm curious about the rules for removing code like this. in the case
> > of drivers, isn't it possible that some driver source could be
> > relevant for both the 2.4 and 2.6 kernel source tree, and simply uses
> > that kind of preprocessor check to make sure it's being compiled
> > appropriately?
> That's what it was for.
> > or are you doing something more sophisticated than simply checking the
> > kernel version being tested?
> The point is:
> It seems this driver was once maintained for both 2.4 and 2.6 in one
> As long as this is done, such version checks are OK.
Personally, I don't like to see 2.4 and 2.6 in a new driver, and will
tend to try to force it to be 2.6 only. For an existing driver, I tend
to be much more tolerant: removing the huge gobs of code to achieve 2.6
only is usually a bit disruptive on both the driver and the maintainer
> But if a driver is no longer actually maintained for both kernels these
> checks become useless (and there quickly arised unconditional 2.6-only
> code in such a driver) and can be removed.
This driver is maintained by
Yokota Hiroshi <yokota@xxxxxxxxxxxxxxxxxxxxxxx>
GOTO Masanori <gotom@xxxxxxxxxx>
As it says in the header. It was last modified in May 2006, so it is
maintained under the somewhat elastic standards of SCSI. I've cc'd them
to see what they think.
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