x86: move per-cpu mmu_gathers to mm/init.c

[ Impact: cleanup ]
Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi>
LKML-Reference: <1240923650.1982.22.camel@penberg-laptop>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/mm/init.c

@@ -9,6 +9,9 @@
 #include <asm/sections.h>
 #include <asm/system.h>
 #include <asm/tlbflush.h>
+#include <asm/tlb.h>
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 
 unsigned long __initdata e820_table_start;
 unsigned long __meminitdata e820_table_end;

arch/x86/mm/init_32.c

@@ -52,7 +52,6 @@
 #include <asm/page_types.h>
 #include <asm/init.h>
 
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 unsigned long highstart_pfn, highend_pfn;
 
 static noinline int do_test_wp_bit(void);

arch/x86/mm/init_64.c

@@ -52,8 +52,6 @@
 
 static unsigned long dma_reserve __initdata;
 
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-
 static int __init parse_direct_gbpages_off(char *arg)
 {
 	direct_gbpages = 0;