[PATCH] mm: don't use ZONE_DMA unless CONFIG_ZONE_DMA is set in setup.c

[Andres Salomon]

If CONFIG_ZONE_DMA is ever undefined, ZONE_DMA will also not be defined,
and setup.c won't compile.  This wraps it with an #ifdef.

Signed-off-by: Andres Salomon <dilinger@xxxxxxxxxx>
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index 0b476e1..b69626e 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -371,8 +371,10 @@ void __init zone_sizes_init(void)
 {
 	unsigned long max_zone_pfns[MAX_NR_ZONES];
 	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+#ifdef CONFIG_ZONE_DMA
 	max_zone_pfns[ZONE_DMA] =
 		virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+#endif
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 #ifdef CONFIG_HIGHMEM
 	max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;