From: Chris Leech <christopher.leech@intel.com>
Date: Wed, 2 Aug 2006 21:21:19 +0000 (-0700)
Subject: [I/OAT]: Remove CPU hotplug lock from net_dma_rebalance
X-Git-Tag: v2.6.18-rc4~65^2~2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e6eb307d48c81d688804f8b39a0a3ddde3cd3458;p=pandora-kernel.git

[I/OAT]: Remove CPU hotplug lock from net_dma_rebalance

Remove the lock_cpu_hotplug()/unlock_cpu_hotplug() calls from
net_dma_rebalance

The lock_cpu_hotplug()/unlock_cpu_hotplug() sequence in
net_dma_rebalance is both incorrect (as pointed out by David Miller)
because lock_cpu_hotplug() may sleep while the net_dma_event_lock
spinlock is held, and unnecessary (as pointed out by Andrew Morton) as
spin_lock() disables preemption which protects from CPU hotplug
events.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

Reading git-diff-tree failed