From: Sven-Thorsten Dietrich Date: Fri, 3 Jul 2009 08:30:35 -0500 Subject: infiniband: Mellanox IB driver patch use _nort() primitives Fixes in_atomic stack-dump, when Mellanox module is loaded into the RT Kernel. Michael S. Tsirkin sayeth: "Basically, if you just make spin_lock_irqsave (and spin_lock_irq) not disable interrupts for non-raw spinlocks, I think all of infiniband will be fine without changes." Signed-off-by: Sven-Thorsten Dietrich Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) Index: linux-3.2/drivers/infiniband/ulp/ipoib/ipoib_multicast.c =================================================================== --- linux-3.2.orig/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ linux-3.2/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -806,7 +806,7 @@ void ipoib_mcast_restart_task(struct wor ipoib_mcast_stop_thread(dev, 0); - local_irq_save(flags); + local_irq_save_nort(flags); netif_addr_lock(dev); spin_lock(&priv->lock); @@ -888,7 +888,7 @@ void ipoib_mcast_restart_task(struct wor spin_unlock(&priv->lock); netif_addr_unlock(dev); - local_irq_restore(flags); + local_irq_restore_nort(flags); /* We have to cancel outside of the spinlock */ list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {