From: Michael Neuling <mikey@neuling.org>
Date: Wed, 14 Jan 2009 13:42:41 +0000 (+0000)
Subject: powerpc: Get the number of SLBs from "slb-size" property
X-Git-Tag: v2.6.29-rc2~4^2~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=b60c31d85a2a2f1a9c8623f1fb56e2688aa1e2b1;p=users%2Fjedix%2Flinux-maple.git

powerpc: Get the number of SLBs from "slb-size" property

The PAPR says that the property for specifying the number of SLBs should
be called "slb-size".  We currently only look for "ibm,slb-size" because
this is what firmware actually presents.

This patch makes us look for the "slb-size" property as well and in
preference to the "ibm,slb-size".  This should future proof us if
firmware changes to match PAPR.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index c09cffafb6ee..f00f83109ab3 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -590,6 +590,11 @@ static void __init check_cpu_slb_size(unsigned long node)
 {
 	u32 *slb_size_ptr;
 
+	slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL);
+	if (slb_size_ptr != NULL) {
+		mmu_slb_size = *slb_size_ptr;
+		return;
+	}
 	slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL);
 	if (slb_size_ptr != NULL) {
 		mmu_slb_size = *slb_size_ptr;