x86: unify fault_32|64.c

Unify includes in moved fault.c.

Modify Makefiles to pick up unified file.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/mm/Makefile_32

@@ -2,7 +2,7 @@
 # Makefile for the linux i386-specific parts of the memory manager.
 #
 
-obj-y	:= init_32.o pgtable_32.o fault_32.o ioremap.o extable.o pageattr.o mmap.o
+obj-y	:= init_32.o pgtable_32.o fault.o ioremap.o extable.o pageattr.o mmap.o
 
 obj-$(CONFIG_NUMA) += discontig_32.o
 obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o

arch/x86/mm/Makefile_64

@@ -2,7 +2,7 @@
 # Makefile for the linux x86_64-specific parts of the memory manager.
 #
 
-obj-y	 := init_64.o fault_64.o ioremap.o extable.o pageattr.o mmap.o
+obj-y	 := init_64.o fault.o ioremap.o extable.o pageattr.o mmap.o
 obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
 obj-$(CONFIG_NUMA) += numa_64.o
 obj-$(CONFIG_K8_NUMA) += k8topology_64.o

arch/x86/mm/fault_64.c → arch/x86/mm/fault.c

@@ -18,6 +18,8 @@
 #include <linux/tty.h>
 #include <linux/vt_kern.h>		/* For unblank_screen() */
 #include <linux/compiler.h>
+#include <linux/highmem.h>
+#include <linux/bootmem.h>		/* for max_low_pfn */
 #include <linux/vmalloc.h>
 #include <linux/module.h>
 #include <linux/kprobes.h>
@@ -25,6 +27,8 @@
 #include <linux/kdebug.h>
 
 #include <asm/system.h>
+#include <asm/desc.h>
+#include <asm/segment.h>
 #include <asm/pgalloc.h>
 #include <asm/smp.h>
 #include <asm/tlbflush.h>
@@ -88,16 +92,15 @@ static int is_prefetch(struct pt_regs *regs, unsigned long addr,
 	unsigned char *max_instr;
 
 #ifdef CONFIG_X86_32
-	if (unlikely(boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
-		     boot_cpu_data.x86 >= 6)) {
-		/* Catch an obscure case of prefetch inside an NX page. */
+# ifdef CONFIG_X86_PAE
+	/* If it was a exec fault on NX page, ignore */
 	if (nx_enabled && (error_code & PF_INSTR))
 		return 0;
-	} else {
+# else
 	return 0;
-	}
-#else
-	/* If it was a exec fault ignore */
+# endif
+#else /* CONFIG_X86_64 */
+	/* If it was a exec fault on NX page, ignore */
 	if (error_code & PF_INSTR)
 		return 0;
 #endif