[PATCH 1/2] powerpc/prom: move mmu_early_init_devtree() before early_init_dt_scan_cpus()

[Pingfan Liu]

In early_init_dt_scan_cpus() -> allocate_paca(), using ppc64_bolted_size()
to get the limitation. Although MMU_SEGSIZE_256M is enough for boot cpu's
paca, but in fact the bolted segment size may be MMU_SEGSIZE_1T. Hence
moving mmu_early_init_devtree() a little earlier, and let any callers of
ppc64_bolted_size() get the right value.

Signed-off-by: Pingfan Liu <kernelfans at gmail.com>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Hari Bathini <hbathini at linux.ibm.com>
Cc: Mahesh Salgaonkar <mahesh at linux.vnet.ibm.com>
Cc: Anton Blanchard <anton at samba.org>
---
 arch/powerpc/kernel/prom.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index c4d7078..cae4a78 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -760,6 +760,7 @@ void __init early_init_devtree(void *params)
 	DBG("Scanning CPUs ...\n");
 
 	dt_cpu_ftrs_scan();
+	mmu_early_init_devtree();
 
 	/* Retrieve CPU related informations from the flat tree
 	 * (altivec support, boot CPU ID, ...)
@@ -777,8 +778,6 @@ void __init early_init_devtree(void *params)
 	spinning_secondaries = boot_cpu_count - 1;
 #endif
 
-	mmu_early_init_devtree();
-
 #ifdef CONFIG_PPC_POWERNV
 	/* Scan and build the list of machine check recoverable ranges */
 	of_scan_flat_dt(early_init_dt_scan_recoverable_ranges, NULL);
-- 
2.7.4