powerpc: Rearrange mmap.c

Rearrange mmap.c to better match the x86 version.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/mm/mmap.c

@@ -34,6 +34,17 @@
 #define MIN_GAP (128*1024*1024)
 #define MAX_GAP (TASK_SIZE/6*5)
 
+static inline int mmap_is_legacy(void)
+{
+	if (current->personality & ADDR_COMPAT_LAYOUT)
+		return 1;
+
+	if (current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY)
+		return 1;
+
+	return sysctl_legacy_va_layout;
+}
+
 static inline unsigned long mmap_base(void)
 {
 	unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
@@ -46,17 +57,6 @@ static inline unsigned long mmap_base(void)
 	return TASK_SIZE - (gap & PAGE_MASK);
 }
 
-static inline int mmap_is_legacy(void)
-{
-	if (current->personality & ADDR_COMPAT_LAYOUT)
-		return 1;
-
-	if (current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY)
-		return 1;
-
-	return sysctl_legacy_va_layout;
-}
-
 /*
  * This function, called very early during the creation of a new
  * process VM image, sets up which VM layout function to use: