ppc64: use usercopy_64.c from powerpc/lib

since it is identical to usercopy.c from ppc64/lib.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>

arch/powerpc/lib/Makefile

@@ -4,13 +4,13 @@
 
 ifeq ($(CONFIG_PPC_MERGE),y)
 obj-y			:= string.o
-obj-$(CONFIG_PPC64)	+= usercopy_64.o mem_64.o
+obj-$(CONFIG_PPC64)	+= mem_64.o
 endif
 
 obj-y			+= strcase.o
 obj-$(CONFIG_PPC32)	+= div64.o copy_32.o checksum_32.o
 obj-$(CONFIG_PPC64)	+= checksum_64.o copypage_64.o copyuser_64.o \
-			   memcpy_64.o
+			   memcpy_64.o usercopy_64.o
 obj-$(CONFIG_PPC_ISERIES) += e2a.o
 ifeq ($(CONFIG_PPC64),y)
 obj-$(CONFIG_SMP)	+= locks.o

arch/ppc64/lib/Makefile

@@ -3,4 +3,3 @@
 #
 
 lib-y := string.o
-lib-y += usercopy.o

arch/ppc64/lib/usercopy.c

-/*
- * Functions which are too large to be inlined.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#include <linux/module.h>
-#include <asm/uaccess.h>
-
-unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-	if (likely(access_ok(VERIFY_READ, from, n)))
-		n = __copy_from_user(to, from, n);
-	else
-		memset(to, 0, n);
-	return n;
-}
-
-unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-	if (likely(access_ok(VERIFY_WRITE, to, n)))
-		n = __copy_to_user(to, from, n);
-	return n;
-}
-
-unsigned long copy_in_user(void __user *to, const void __user *from,
-			   unsigned long n)
-{
-	might_sleep();
-	if (likely(access_ok(VERIFY_READ, from, n) &&
-	    access_ok(VERIFY_WRITE, to, n)))
-		n =__copy_tofrom_user(to, from, n);
-	return n;
-}
-
-EXPORT_SYMBOL(copy_from_user);
-EXPORT_SYMBOL(copy_to_user);
-EXPORT_SYMBOL(copy_in_user);
-