[S390] Rearrange mmap.c

Shuffle code around so it looks more like x86 and powerpc.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/mm/mmap.c

@@ -47,6 +47,15 @@ static unsigned long stack_maxrandom_size(void)
 #define MIN_GAP (32*1024*1024)
 #define MAX_GAP (STACK_TOP/6*5)
 
+static inline int mmap_is_legacy(void)
+{
+	if (current->personality & ADDR_COMPAT_LAYOUT)
+		return 1;
+	if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
+		return 1;
+	return sysctl_legacy_va_layout;
+}
+
 static inline unsigned long mmap_base(void)
 {
 	unsigned long gap = rlimit(RLIMIT_STACK);
@@ -59,15 +68,6 @@ static inline unsigned long mmap_base(void)
 	return STACK_TOP - stack_maxrandom_size() - (gap & PAGE_MASK);
 }
 
-static inline int mmap_is_legacy(void)
-{
-	if (current->personality & ADDR_COMPAT_LAYOUT)
-		return 1;
-	if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
-		return 1;
-	return sysctl_legacy_va_layout;
-}
-
 #ifndef CONFIG_64BIT
 
 /*