powerpc/eeh: Move EEH initialization around

Currently, we have 3 phases for EEH initialization on pSeries platform.
All of them are done through builtin functions: platform initialization,
EEH device creation, and EEH subsystem enablement. All of them are done
no later than ppc_md.setup_arch. That means that the slab/slub isn't ready
yet, so we have to allocate memory chunks on basis of PAGE_SIZE for those
dynamically created EEH devices. That's pretty expensive.

In order to utilize slab/slub for memory allocation, we have to move the EEH
initialization functions around, but all of them should be called after slab
is ready.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/pseries/eeh_dev.c b/arch/powerpc/platforms/pseries/eeh_dev.c
index c4507d095900..ab68c5910f9f 100644
--- a/arch/powerpc/platforms/pseries/eeh_dev.c
+++ b/arch/powerpc/platforms/pseries/eeh_dev.c
@@ -93,10 +93,14 @@ void __devinit eeh_dev_phb_init_dynamic(struct pci_controller *phb)
  * Scan all the existing PHBs and create EEH devices for their OF
  * nodes and their children OF nodes
  */
-void __init eeh_dev_phb_init(void)
+static int __init eeh_dev_phb_init(void)
 {
 	struct pci_controller *phb, *tmp;
 
 	list_for_each_entry_safe(phb, tmp, &hose_list, list_node)
 		eeh_dev_phb_init_dynamic(phb);
+
+	return 0;
 }
+
+core_initcall(eeh_dev_phb_init);