Put r7 back into clobber registers in sys_clone() for thumb2.

linux_syscall_support.h

Index: linux_syscall_support.h
diff --git a/linux_syscall_support.h b/linux_syscall_support.h
index 8a42c1c8687b2af252811c28581cabfd89a3a3ae..93fdad751b4ce411b51db26af1f01090a1cbc82a 100644
--- a/linux_syscall_support.h
+++ b/linux_syscall_support.h
@@ -2377,9 +2377,6 @@ struct kernel_statfs {
         __asm__ __volatile__(/* if (fn == NULL || child_stack == NULL)
                               *   return -EINVAL;
                               */
-#ifdef __thumb2__
-                             "push  {r7}\n"
-#endif
                              "cmp   %2,#0\n"
                              "it    ne\n"
                              "cmpne %3,#0\n"
@@ -2435,19 +2432,12 @@ struct kernel_statfs {
                              "mov r7, %10\n"
                              "swi 0x0\n"
                            "1:\n"
-#ifdef __thumb2__
-                             "pop {r7}"
-#endif
                              : "=r" (__res)
                              : "i"(-EINVAL),
                                "r"(fn), "r"(__stack), "r"(__flags), "r"(arg),
                                "r"(__ptid), "r"(__tls), "r"(__ctid),
                                "i"(__NR_clone), "i"(__NR_exit)
-#ifdef __thumb2__
-                             : "cc", "lr", "memory");
-#else
                              : "cc", "r7", "lr", "memory");
-#endif
       }
       LSS_RETURN(int, __res);
     }