1 files changed, 3 insertions, 1 deletions

diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 959b2d2490df..ffc599bd85c3 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -98,12 +98,14 @@ long sys_ptrace(long request, long pid, long addr, long data)
                 if(addr < MAX_REG_OFFSET){
                         tmp = getreg(child, addr);
                 }
+#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
                 else if((addr >= offsetof(struct user, u_debugreg[0])) &&
                         (addr <= offsetof(struct user, u_debugreg[7]))){
                         addr -= offsetof(struct user, u_debugreg[0]);
                         addr = addr >> 2;
                         tmp = child->thread.arch.debugregs[addr];
                 }
+#endif
                 ret = put_user(tmp, (unsigned long __user *) data);
                 break;
         }
@@ -127,7 +129,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
                         ret = putreg(child, addr, data);
                         break;
                 }
-#if 0 /* XXX x86_64 */
+#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
                 else if((addr >= offsetof(struct user, u_debugreg[0])) &&
                         (addr <= offsetof(struct user, u_debugreg[7]))){
                           addr -= offsetof(struct user, u_debugreg[0]);