x86, mm: Unify zone_sizes_init()

Now that zone_sizes_init() is identical on 32-bit and 64-bit,
move the code to arch/x86/mm/init.c and use it for both
architectures.

Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Link: http://lkml.kernel.org/r/1320155902-10424-7-git-send-email-penberg@kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 87488b93a65c..2426b60bb409 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -3,6 +3,7 @@
 #include <linux/ioport.h>
 #include <linux/swap.h>
 #include <linux/memblock.h>
+#include <linux/bootmem.h>      /* for max_low_pfn */
 
 #include <asm/cacheflush.h>
 #include <asm/e820.h>
@@ -15,6 +16,7 @@
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
 #include <asm/proto.h>
+#include <asm/dma.h>            /* for MAX_DMA_PFN */
 
 unsigned long __initdata pgt_buf_start;
 unsigned long __meminitdata pgt_buf_end;
@@ -392,3 +394,24 @@ void free_initrd_mem(unsigned long start, unsigned long end)
         free_init_pages("initrd memory", start, PAGE_ALIGN(end));
 }
 #endif
+
+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]         = MAX_DMA_PFN;
+#endif
+#ifdef CONFIG_ZONE_DMA32
+        max_zone_pfns[ZONE_DMA32]       = MAX_DMA32_PFN;
+#endif
+        max_zone_pfns[ZONE_NORMAL]      = max_low_pfn;
+#ifdef CONFIG_HIGHMEM
+        max_zone_pfns[ZONE_HIGHMEM]     = max_pfn;
+#endif
+
+        free_area_init_nodes(max_zone_pfns);
+}
+