rt-patches/0041-infiniband-Mellanox-IB-driver-patch-use-_nort-primit.patch

   1 From e297aa4bdf801fafffea3c7de1e62763959acd77 Mon Sep 17 00:00:00 2001
   2 From: Sven-Thorsten Dietrich <sdietrich@novell.com>
   3 Date: Fri, 3 Jul 2009 08:30:35 -0500
   4 Subject: [PATCH 041/366] infiniband: Mellanox IB driver patch use _nort()
   5  primitives
   6
   7 Fixes in_atomic stack-dump, when Mellanox module is loaded into the RT
   8 Kernel.
   9
  10 Michael S. Tsirkin <mst@dev.mellanox.co.il> sayeth:
  11 "Basically, if you just make spin_lock_irqsave (and spin_lock_irq) not disable
  12 interrupts for non-raw spinlocks, I think all of infiniband will be fine without
  13 changes."
  14
  15 Signed-off-by: Sven-Thorsten Dietrich <sven@thebigcorporation.com>
  16 Signed-off-by: Ingo Molnar <mingo@elte.hu>
  17 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  18 ---
  19  drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 4 ++--
  20  1 file changed, 2 insertions(+), 2 deletions(-)
  21
  22 diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
  23 index 87799de..66cdd37 100644
  24 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
  25 +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
  26 @@ -857,7 +857,7 @@ void ipoib_mcast_restart_task(struct work_struct *work)
  27
  28         ipoib_dbg_mcast(priv, "restarting multicast task\n");
  29
  30 -       local_irq_save(flags);
  31 +       local_irq_save_nort(flags);
  32         netif_addr_lock(dev);
  33         spin_lock(&priv->lock);
  34
  35 @@ -939,7 +939,7 @@ void ipoib_mcast_restart_task(struct work_struct *work)
  36
  37         spin_unlock(&priv->lock);
  38         netif_addr_unlock(dev);
  39 -       local_irq_restore(flags);
  40 +       local_irq_restore_nort(flags);
  41
  42         /*
  43          * make sure the in-flight joins have finished before we attempt
  44 --
  45 1.9.1
  46