From 7154fc09ffc9a986970d8537e74a09a02f5dace4 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sat, 7 Oct 2017 07:46:42 -0600
Subject: [PATCH] syscall/: Fix some backward conditional compilation

---
 include/sys/syscall.h    | 2 +-
 syscall/syscall_lookup.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/sys/syscall.h b/include/sys/syscall.h
index b468fdd3e1..8e6bd75941 100644
--- a/include/sys/syscall.h
+++ b/include/sys/syscall.h
@@ -302,7 +302,7 @@
 #  else
 #    define __SYS_termios               __SYS_poll
 #  endif
-#  ifndef CONFIG_SERIAL_TERMIOS
+#  ifdef CONFIG_SERIAL_TERMIOS
 #    define SYS_tcdrain                __SYS_termios
 #    define __SYS_boardctl             (__SYS_termios+1)
 #  else
diff --git a/syscall/syscall_lookup.h b/syscall/syscall_lookup.h
index 6c6ce0dab7..7153313de4 100644
--- a/syscall/syscall_lookup.h
+++ b/syscall/syscall_lookup.h
@@ -211,7 +211,7 @@ SYSCALL_LOOKUP(up_assert,                  2, STUB_up_assert)
   SYSCALL_LOOKUP(poll,                     3, STUB_poll)
   SYSCALL_LOOKUP(select,                   5, STUB_select)
 #  endif
-#  ifndef CONFIG_SERIAL_TERMIOS
+#  ifdef CONFIG_SERIAL_TERMIOS
   SYSCALL_LOOKUP(tcdrain,                  1, STUB_tcdrain)
 #  endif
 #endif