m32r: mm: fix build warning

While building we are getting warnings:

  arch/m32r/mm/init.c:63:17: warning: unused variable 'low'
  arch/m32r/mm/init.c:62:17: warning: unused variable 'max_dma'

max_dma and low are only used if CONFIG_MMU is defined.  Lets declare
the variables inside the #ifdef.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 15 insertions, 12 deletions

diff --git a/arch/m32r/mm/init.c b/arch/m32r/mm/init.c
index 0d4146f644dc..11fa717d93b1 100644
--- a/arch/m32r/mm/init.c
+++ b/arch/m32r/mm/init.c
@@ -59,21 +59,24 @@ void free_initrd_mem(unsigned long, unsigned long);
 void __init zone_sizes_init(void)
 {
         unsigned long  zones_size[MAX_NR_ZONES] = {0, };
-        unsigned long  max_dma;
-        unsigned long  low;
         unsigned long  start_pfn;
 
 #ifdef CONFIG_MMU
-        start_pfn = START_PFN(0);
-        max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
-        low = MAX_LOW_PFN(0);
-
-        if (low < max_dma){
-                zones_size[ZONE_DMA] = low - start_pfn;
-                zones_size[ZONE_NORMAL] = 0;
-        } else {
-                zones_size[ZONE_DMA] = low - start_pfn;
-                zones_size[ZONE_NORMAL] = low - max_dma;
+        {
+                unsigned long  low;
+                unsigned long  max_dma;
+
+                start_pfn = START_PFN(0);
+                max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+                low = MAX_LOW_PFN(0);
+
+                if (low < max_dma) {
+                        zones_size[ZONE_DMA] = low - start_pfn;
+                        zones_size[ZONE_NORMAL] = 0;
+                } else {
+                        zones_size[ZONE_DMA] = low - start_pfn;
+                        zones_size[ZONE_NORMAL] = low - max_dma;
+                }
         }
 #else
         zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;