mm/nobootmem.c: remove duplicate macro ARCH_LOW_ADDRESS_LIMIT statements

Fix the following bugs:

 - the same ARCH_LOW_ADDRESS_LIMIT statements are duplicated between
   header and relevant source

 - don't ensure ARCH_LOW_ADDRESS_LIMIT perhaps defined by ARCH in
   asm/processor.h is preferred over default in linux/bootmem.h
   completely since the former header isn't included by the latter

Link: http://lkml.kernel.org/r/e046aeaa-e160-6d9e-dc1b-e084c2fd999f@zoho.com
Signed-off-by: zijun_hu <zijun_hu@htc.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/bootmem.h

@@ -7,6 +7,7 @@
 #include <linux/mmzone.h>
 #include <linux/mm_types.h>
 #include <asm/dma.h>
+#include <asm/processor.h>
 
 /*
  *  simple boot-time physical memory area allocator.
@@ -119,6 +120,10 @@ extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
 #endif
 
+#ifndef ARCH_LOW_ADDRESS_LIMIT
+#define ARCH_LOW_ADDRESS_LIMIT  0xffffffffUL
+#endif
+
 #define alloc_bootmem(x) \
 	__alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 #define alloc_bootmem_align(x, align) \
@@ -180,10 +185,6 @@ static inline void * __init memblock_virt_alloc_nopanic(
 						    NUMA_NO_NODE);
 }
 
-#ifndef ARCH_LOW_ADDRESS_LIMIT
-#define ARCH_LOW_ADDRESS_LIMIT  0xffffffffUL
-#endif
-
 static inline void * __init memblock_virt_alloc_low(
 					phys_addr_t size, phys_addr_t align)
 {

mm/nobootmem.c

@@ -11,18 +11,21 @@
 #include <linux/init.h>
 #include <linux/pfn.h>
 #include <linux/slab.h>
-#include <linux/bootmem.h>
 #include <linux/export.h>
 #include <linux/kmemleak.h>
 #include <linux/range.h>
 #include <linux/memblock.h>
+#include <linux/bootmem.h>
 
 #include <asm/bug.h>
 #include <asm/io.h>
-#include <asm/processor.h>
 
 #include "internal.h"
 
+#ifndef CONFIG_HAVE_MEMBLOCK
+#error CONFIG_HAVE_MEMBLOCK not defined
+#endif
+
 #ifndef CONFIG_NEED_MULTIPLE_NODES
 struct pglist_data __refdata contig_page_data;
 EXPORT_SYMBOL(contig_page_data);
@@ -395,9 +398,6 @@ void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
 	return __alloc_bootmem_node(pgdat, size, align, goal);
 }
 
-#ifndef ARCH_LOW_ADDRESS_LIMIT
-#define ARCH_LOW_ADDRESS_LIMIT	0xffffffffUL
-#endif
 
 /**
  * __alloc_bootmem_low - allocate low boot memory