[PATCH 2/5 v2] s390/setup: use memblock_first_region_size helper

[Alexander Kuleshov <kuleshovmail@gmail.com>]

The 0a11142e commit (mm/memblock: Introduce memblock_first_region_size()
helper) introduced memblock_first_region_size() helper for the getting
size of the first memblock region. Let's use it instead of directly access
to structure.

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
---
 arch/s390/kernel/setup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index ca070d2..69c3859 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -563,7 +563,7 @@ static void __init reserve_crashkernel(void)
 	if (rc || crash_size == 0)
 		return;
 
-	if (memblock.memory.regions[0].size < crash_size) {
+	if (memblock_first_region_size() < crash_size) {
 		pr_info("crashkernel reservation failed: %s\n",
 			"first memory chunk must be at least crashkernel size");
 		return;
-- 
2.5.0