[IA64] regset: 32-bit support

This is the 32-bit regset implementation under IA64. Basically register
read/write, which is derived from current ptrace register read/write.
This version added TLS support.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/ptrace.c

@@ -2314,5 +2314,10 @@ static const struct user_regset_view user_ia64_view = {
 
 const struct user_regset_view *task_user_regset_view(struct task_struct *tsk)
 {
+#ifdef CONFIG_IA32_SUPPORT
+	extern const struct user_regset_view user_ia32_view;
+	if (IS_IA32_PROCESS(task_pt_regs(tsk)))
+		return &user_ia32_view;
+#endif
 	return &user_ia64_view;
 }