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    SubjectRe: [RFC][PATCH] nbd driver for 2.5.72

    > The following (attached) patch to the network block device driver (nbd)
    > is now specific to just 2.5.72 with various other changes as suggested
    > by Pavel and Steven. Please let me know what you think. There's
    > definately room for more improvements but I don't believe the existing
    > 2.5 series nbd driver (at least up through 2.5.72) works at all. Has
    > anyone tested nbd as distributed with 2.5? I've been too busy writing
    > this new nbd driver to even have checked the original driver (but some
    > of the bugs I've encountered make me believe the original won't work at
    > all). Here's a URL to follow to see just the two resultant files (and/or
    > the patch in case it doesn't come through as an attachment):
    > <>.
    > Thanks!
    > PS: Please email me or CC me if you have any feedback for me.

    > diff -urN linux-2.5.72/drivers/block/nbd.c linux-2.5.72-new/drivers/block/nbd.c
    > --- linux-2.5.72/drivers/block/nbd.c 2003-06-16 22:19:44.000000000 -0600
    > +++ linux-2.5.72-new/drivers/block/nbd.c 2003-06-20 21:27:44.650037153 -0600
    > @@ -24,10 +25,35 @@
    > * 01-3-11 Make nbd work with new Linux block layer code. It now supports
    > * plugging like all the other block devices. Also added in MSG_MORE to
    > * reduce number of partial TCP segments sent. <>
    > - * 01-12-6 Fix deadlock condition by making queue locks independent of
    > + * 01-12-6 Fix deadlock condition by making queue locks independant

    This actually *introduces* typo.

    > #include <asm/uaccess.h>
    > #include <asm/types.h>
    > +#include <asm/system.h> /* for __xchg()... */
    > +#define atomic_exchange(x,ptr,size) __xchg((x),(ptr),(size))

    atomic_exchange seems to be defined but never used?

    When do you have a heart between your knees?
    [Johanka's followup: and *two* hearts?]
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