From c11c249e8f6290dcbbbf44b76deae97931f18dba Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sun, 8 Oct 2017 12:25:58 -0600
Subject: [PATCH] Fix some compile problems in last commits when debug
 assertions are enabled.

---
 libc/misc/lib_filesem.c   | 4 +++-
 libc/misc/lib_streamsem.c | 5 ++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/libc/misc/lib_filesem.c b/libc/misc/lib_filesem.c
index f8258450d3..ff51e009f0 100644
--- a/libc/misc/lib_filesem.c
+++ b/libc/misc/lib_filesem.c
@@ -79,6 +79,7 @@ void lib_sem_initialize(FAR struct file_struct *stream)
 void lib_take_semaphore(FAR struct file_struct *stream)
 {
   pid_t my_pid = getpid();
+  int ret;
 
   /* Do I already have the semaphore? */
 
@@ -92,13 +93,14 @@ void lib_take_semaphore(FAR struct file_struct *stream)
     {
       /* Take the semaphore (perhaps waiting) */
 
-      while (_SEM_WAIT(&stream->fs_sem) < 0)
+      while ((ret = _SEM_WAIT(&stream->fs_sem)) < 0)
         {
           /* The only case that an error should occr here is if the wait
            * was awakened by a signal.
            */
 
           DEBUGASSERT(_SEM_ERRNO(ret) == EINTR);
+          UNUSED(ret);
         }
 
       /* We have it.  Claim the stak and return */
diff --git a/libc/misc/lib_streamsem.c b/libc/misc/lib_streamsem.c
index 407c8ac22d..6bfb1d1a6a 100644
--- a/libc/misc/lib_streamsem.c
+++ b/libc/misc/lib_streamsem.c
@@ -56,15 +56,18 @@
 
 void stream_semtake(FAR struct streamlist *list)
 {
+  int ret;
+
   /* Take the semaphore (perhaps waiting) */
 
-  while (_SEM_WAIT(&list->sl_sem) != 0)
+  while ((ret = _SEM_WAIT(&list->sl_sem)) < 0)
     {
       /* The only case that an error should occr here is if
        * the wait was awakened by a signal.
        */
 
       DEBUGASSERT(_SEM_ERRNO(ret) == EINTR);
+      UNUSED(ret);
     }
 }