[SPARC64]: Call real_setup_per_cpu_areas() earlier and use lmb_alloc().

We have to do it like this before we can move the PROM and MDESC device
tree code over to using lmb_alloc().
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/smp.c

@@ -20,7 +20,7 @@
 #include <linux/cache.h>
 #include <linux/jiffies.h>
 #include <linux/profile.h>
-#include <linux/bootmem.h>
+#include <linux/lmb.h>
 
 #include <asm/head.h>
 #include <asm/ptrace.h>
@@ -1431,7 +1431,7 @@ EXPORT_SYMBOL(__per_cpu_shift);
 
 void __init real_setup_per_cpu_areas(void)
 {
-	unsigned long goal, size, i;
+	unsigned long paddr, goal, size, i;
 	char *ptr;
 
 	/* Copy section for each CPU (we discard the original) */
@@ -1441,8 +1441,13 @@ void __init real_setup_per_cpu_areas(void)
 	for (size = PAGE_SIZE; size < goal; size <<= 1UL)
 		__per_cpu_shift++;
 
-	ptr = alloc_bootmem_pages(size * NR_CPUS);
+	paddr = lmb_alloc(size * NR_CPUS, PAGE_SIZE);
+	if (!paddr) {
+		prom_printf("Cannot allocate per-cpu memory.\n");
+		prom_halt();
+	}
 
+	ptr = __va(paddr);
 	__per_cpu_base = ptr - __per_cpu_start;
 
 	for (i = 0; i < NR_CPUS; i++, ptr += size)

arch/sparc64/mm/init.c

@@ -1208,6 +1208,12 @@ void __init paging_init(void)
 	if (tlb_type == hypervisor)
 		sun4v_ktsb_register();
 
+	/* We must setup the per-cpu areas before we pull in the
+	 * PROM and the MDESC.  The code there fills in cpu and
+	 * other information into per-cpu data structures.
+	 */
+	real_setup_per_cpu_areas();
+
 	/* Setup bootmem... */
 	pages_avail = 0;
 	last_valid_pfn = end_pfn = bootmem_init(&pages_avail, phys_base);
@@ -1216,8 +1222,6 @@ void __init paging_init(void)
 
 	kernel_physical_mapping_init();
 
-	real_setup_per_cpu_areas();
-
 	prom_build_devicetree();
 
 	if (tlb_type == hypervisor)