x86, mm: Move after_bootmem to mm_internel.h

it is only used in arch/x86/mm/init*.c

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-41-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/mm/mm_internal.h

@@ -14,4 +14,6 @@ unsigned long kernel_physical_mapping_init(unsigned long start,
 					     unsigned long page_size_mask);
 void zone_sizes_init(void);
 
+extern int after_bootmem;
+
 #endif	/* __X86_MM_INTERNAL_H */

include/linux/mm.h

@@ -1355,7 +1355,6 @@ extern void __init mmap_init(void);
 extern void show_mem(unsigned int flags);
 extern void si_meminfo(struct sysinfo * val);
 extern void si_meminfo_node(struct sysinfo *val, int nid);
-extern int after_bootmem;
 
 extern __printf(3, 4)
 void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);