From: Jesse Larrew Date: Wed, 24 Apr 2013 06:00:35 +0000 (+0000) Subject: powerpc/pseries: Update CPU maps when device tree is updated X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~66^2~54 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5d88aa85c00bb4026dd986430dc496effc637d42;p=pandora-kernel.git powerpc/pseries: Update CPU maps when device tree is updated Platform events such as partition migration or the new PRRN firmware feature can cause the NUMA characteristics of a CPU to change, and these changes will be reflected in the device tree nodes for the affected CPUs. This patch registers a handler for Open Firmware device tree updates and reconfigures the CPU and node maps whenever the associativity changes. Currently, this is accomplished by marking the affected CPUs in the cpu_associativity_changes_mask and allowing arch_update_cpu_topology() to retrieve the new associativity information using hcall_vphn(). Protecting the NUMA cpu maps from concurrent access during an update operation will be addressed in a subsequent patch in this series. Signed-off-by: Nathan Fontenot Signed-off-by: Benjamin Herrenschmidt --- Reading git-diff-tree failed