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Subject[RFC/PATCH 7/7] x86, mm: Unify zone_sizes_init()
Date
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.

Cc: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---
arch/x86/include/asm/init.h | 2 ++
arch/x86/mm/init.c | 23 +++++++++++++++++++++++
arch/x86/mm/init_32.c | 19 -------------------
arch/x86/mm/init_64.c | 19 -------------------
4 files changed, 25 insertions(+), 38 deletions(-)
diff --git a/arch/x86/include/asm/init.h b/arch/x86/include/asm/init.h
index 8dbe353..adcc0ae 100644
--- a/arch/x86/include/asm/init.h
+++ b/arch/x86/include/asm/init.h
@@ -5,6 +5,8 @@
extern void __init early_ioremap_page_table_range_init(void);
#endif

+extern void __init zone_sizes_init(void);
+
extern unsigned long __init
kernel_physical_mapping_init(unsigned long start,
unsigned long end,
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 87488b9..2426b60 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);
+}
+
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 12274fb..f80e8af 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -674,25 +674,6 @@ void __init initmem_init(void)
}
#endif /* !CONFIG_NEED_MULTIPLE_NODES */

-static 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);
-}
-
void __init setup_bootmem_allocator(void)
{
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 06c4360..6fcce7d 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -612,25 +612,6 @@ void __init initmem_init(void)
}
#endif

-static 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);
-}
-
void __init paging_init(void)
{
sparse_memory_present_with_active_regions(MAX_NUMNODES);
--
1.7.6.4


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