s390/setup: fix memblock usage

When converting from bootmem to memblock I missed a subtle difference:
the memblock_alloc() functions return uninitialized memory, while the
memblock_virt_alloc() functions return zeroed memory.

This led to quite random early boot crashes.

Therefore use the correct version everywhere now.
Hopefully.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/setup.c

@@ -304,9 +304,7 @@ static void __init setup_lowcore(void)
 	 * Setup lowcore for boot cpu
 	 */
 	BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * 4096);
-	lc = (struct lowcore *) memblock_alloc_base(sizeof(struct lowcore),
-						    sizeof(struct lowcore),
-						    MAX_DMA_ADDRESS);
+	lc = memblock_virt_alloc_low(sizeof(*lc), sizeof(*lc));
 	lc->restart_psw.mask = PSW_KERNEL_BITS;
 	lc->restart_psw.addr = (unsigned long) restart_int_handler;
 	lc->external_new_psw.mask = PSW_KERNEL_BITS |
@@ -326,9 +324,11 @@ static void __init setup_lowcore(void)
 	lc->clock_comparator = -1ULL;
 	lc->kernel_stack = ((unsigned long) &init_thread_union)
 		+ THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
-	lc->async_stack = memblock_alloc(ASYNC_SIZE, ASYNC_SIZE)
+	lc->async_stack = (unsigned long)
+		memblock_virt_alloc(ASYNC_SIZE, ASYNC_SIZE)
 		+ ASYNC_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
-	lc->panic_stack = memblock_alloc(PAGE_SIZE, PAGE_SIZE)
+	lc->panic_stack = (unsigned long)
+		memblock_virt_alloc(PAGE_SIZE, PAGE_SIZE)
 		+ PAGE_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
 	lc->current_task = (unsigned long)&init_task;
 	lc->lpp = LPP_MAGIC;
@@ -350,7 +350,7 @@ static void __init setup_lowcore(void)
 	lc->last_update_timer = S390_lowcore.last_update_timer;
 	lc->last_update_clock = S390_lowcore.last_update_clock;
 
-	restart_stack = (void *) memblock_alloc(ASYNC_SIZE, ASYNC_SIZE);
+	restart_stack = memblock_virt_alloc(ASYNC_SIZE, ASYNC_SIZE);
 	restart_stack += ASYNC_SIZE;
 
 	/*
@@ -413,7 +413,7 @@ static void __init setup_resources(void)
 	bss_resource.end = (unsigned long) &__bss_stop - 1;
 
 	for_each_memblock(memory, reg) {
-		res = (void *) memblock_alloc(sizeof(*res), 8);
+		res = memblock_virt_alloc(sizeof(*res), 8);
 		res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM;
 
 		res->name = "System RAM";
@@ -427,7 +427,7 @@ static void __init setup_resources(void)
 			    std_res->start > res->end)
 				continue;
 			if (std_res->end > res->end) {
-				sub_res = (void *) memblock_alloc(sizeof(*sub_res), 8);
+				sub_res = memblock_virt_alloc(sizeof(*sub_res), 8);
 				*sub_res = *std_res;
 				sub_res->end = res->end;
 				std_res->start = res->end + 1;