[ewg] [PATCH] BACKPORT - add new cycle_kernel_lock() function

[Ralph Campbell]

I think this really does fix the ib_ipath compile problems :-)

I was able to get the basic driver to load and run IPoIB
on a RHEL4-U4 system (which tests most of the backport patches)
although I had to hand tweak infiniband/core/cm.c for the call
to class_device_create() in cm_add_one().

Vlad, please pull from:

git://git.openfabrics.org/~ralphc/ofed-1.4-linux-2.6/.git ofed_kernel

commit b185a6df881df335babceed2a6086f43b156ae8e
Author: Ralph Campbell (QLogic) <ralphc at hosting.openfabrics.org>
Date:   Thu Aug 7 14:16:56 2008 -0700

    BACKPORT - add new cycle_kernel_lock() function
    
    This backports the function cycle_kernel_lock() which was added in
    2.6.27 by commit 0b2806768899dba5967bcd4a3b93eaed9a1dc4f3 and
    f2b9857eee17797541b845782ade4d7a9d50f843
    
    Signed-off-by: Ralph Campbell <ralph.campbell at qlogic.com>