ia64: get rid of 'segment' argument of __do_{get,put}_user()

it's only evaluated if the first argument is not 0, and in those
cases it's always equal to get_fs()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/ia64/include/asm/uaccess.h

@@ -180,13 +180,13 @@ extern void __get_user_unknown (void);
  * could clobber r8 and r9 (among others).  Thus, be careful not to evaluate it while
  * using r8/r9.
  */
-#define __do_get_user(check, x, ptr, size, segment)					\
+#define __do_get_user(check, x, ptr, size)						\
 ({											\
 	const __typeof__(*(ptr)) __user *__gu_ptr = (ptr);				\
 	__typeof__ (size) __gu_size = (size);						\
 	long __gu_err = -EFAULT;							\
 	unsigned long __gu_val = 0;							\
-	if (!check || __access_ok(__gu_ptr, size, segment))				\
+	if (!check || __access_ok(__gu_ptr, size, get_fs()))				\
 		switch (__gu_size) {							\
 		      case 1: __get_user_size(__gu_val, __gu_ptr, 1, __gu_err); break;	\
 		      case 2: __get_user_size(__gu_val, __gu_ptr, 2, __gu_err); break;	\
@@ -198,8 +198,8 @@ extern void __get_user_unknown (void);
 	__gu_err;									\
 })
 
-#define __get_user_nocheck(x, ptr, size)	__do_get_user(0, x, ptr, size, KERNEL_DS)
-#define __get_user_check(x, ptr, size)	__do_get_user(1, x, ptr, size, get_fs())
+#define __get_user_nocheck(x, ptr, size)	__do_get_user(0, x, ptr, size)
+#define __get_user_check(x, ptr, size)	__do_get_user(1, x, ptr, size)
 
 extern void __put_user_unknown (void);
 
@@ -207,14 +207,14 @@ extern void __put_user_unknown (void);
  * Evaluating arguments X, PTR, SIZE, and SEGMENT may involve subroutine-calls, which
  * could clobber r8 (among others).  Thus, be careful not to evaluate them while using r8.
  */
-#define __do_put_user(check, x, ptr, size, segment)					\
+#define __do_put_user(check, x, ptr, size)						\
 ({											\
 	__typeof__ (x) __pu_x = (x);							\
 	__typeof__ (*(ptr)) __user *__pu_ptr = (ptr);					\
 	__typeof__ (size) __pu_size = (size);						\
 	long __pu_err = -EFAULT;							\
 											\
-	if (!check || __access_ok(__pu_ptr, __pu_size, segment))			\
+	if (!check || __access_ok(__pu_ptr, __pu_size, get_fs()))			\
 		switch (__pu_size) {							\
 		      case 1: __put_user_size(__pu_x, __pu_ptr, 1, __pu_err); break;	\
 		      case 2: __put_user_size(__pu_x, __pu_ptr, 2, __pu_err); break;	\
@@ -225,8 +225,8 @@ extern void __put_user_unknown (void);
 	__pu_err;									\
 })
 
-#define __put_user_nocheck(x, ptr, size)	__do_put_user(0, x, ptr, size, KERNEL_DS)
-#define __put_user_check(x, ptr, size)	__do_put_user(1, x, ptr, size, get_fs())
+#define __put_user_nocheck(x, ptr, size)	__do_put_user(0, x, ptr, size)
+#define __put_user_check(x, ptr, size)	__do_put_user(1, x, ptr, size)
 
 /*
  * Complex access routines