[openib-general] Compile issue with 2.6.12 + realtime preemt patch

[Roland Dreier]

    Steve> Hi, I would like to use the OpenIb drivers with a 2.6.12
    Steve> kernel with the realtime-preemt patch maintained by Ingo
    Steve> Molnar. I get the following error in sdp_conn.c using svn
    Steve> 2909:

    Steve> line 49: error: SPIN_LOCK_UNLOCKED undeclared in this
    Steve> function

    Steve> Has anybody out there got this working or could give me
    Steve> clue how to fix it?

Change

    static spinlock_t psn_lock = SPIN_LOCK_UNLOCKED;

to

    static DEFINE_SPINLOCK(psn_lock);

Libor, we might as well make this change:


Initialize spinlock with DEFINE_SPINLOCK() instead of
SPIN_LOCK_UNLOCKED to be friendly to CONFIG_PREEMPT_RT patches.

Signed-off-by: Roland Dreier <rolandd at cisco.com>

--- infiniband/ulp/sdp/sdp_conn.c	(revision 2904)
+++ infiniband/ulp/sdp/sdp_conn.c	(working copy)
@@ -46,7 +46,7 @@ static struct ib_client sdp_client = {
 	.remove = sdp_device_remove_one
 };
 
-static spinlock_t psn_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(psn_lock);
 static u32        psn_seed;
 
 /*