diff --git a/drivers/syslog/Make.defs b/drivers/syslog/Make.defs
index f573217d6d..9b0d4cf6d5 100644
--- a/drivers/syslog/Make.defs
+++ b/drivers/syslog/Make.defs
@@ -2,7 +2,7 @@
 # drivers/syslog/Make.defs
 # These drivers support system logging devices
 #
-#   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2012, 2016 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -35,60 +35,38 @@
 ############################################################################
 
 ############################################################################
-# Include SYSLOG drivers (only one should be enabled)
+# Include SYSLOG Infrastructure
 
-ifeq ($(CONFIG_SYSLOG),y)
+CSRCS += vsyslog.c vlowsyslog.c syslogstream.c
 
-# If no special loggin devices are implemented, then the default SYSLOG
-# logic at fs/fs_syslog.c will be used
-
-# (Add other SYSLOG drivers here)
-
-ifeq ($(CONFIG_RAMLOG),y)
-  CSRCS += ramlog.c
-endif
+# The note driver is hosted in this directory, but is not associated with
+# SYSLOGging
 
 ifeq ($(CONFIG_DRIVER_NOTE),y)
   CSRCS += note_driver.c
 endif
 
-# (Add other SYSLOG_CONSOLE drivers here)
+############################################################################
+# Include SYSLOG drivers (only one should be enabled)
+
+ifeq ($(CONFIG_RAMLOG),y)
+  CSRCS += ramlog.c
+else ifeq ($(CONFIG_SYSLOG),y)
+
+# If no special logging devices are implemented, then the default SYSLOG
+# logic at fs/fs_syslog.c will be used
+
+# (Add other SYSLOG drivers here)
 
 ifeq ($(CONFIG_SYSLOG_CONSOLE),y)
   CSRCS += syslog_console.c
 endif
 
+# (Add other SYSLOG_CONSOLE drivers here)
+
+endif
+
 # Include SYSLOG build support
 
 DEPPATH += --dep-path syslog
 VPATH += :syslog
-
-############################################################################
-# The RAMLOG can be used even if system logging is not enabled.
-
-else ifeq ($(CONFIG_RAMLOG),y)
-
-CSRCS += ramlog.c
-
-ifeq ($(CONFIG_DRIVER_NOTE),y)
-  CSRCS += note_driver.c
-endif
-
-# Include RAMLOG build support
-
-DEPPATH += --dep-path syslog
-VPATH += :syslog
-
-############################################################################
-# The scheduler note driver can be used in any event.
-
-else ifeq ($(CONFIG_DRIVER_NOTE),y)
-
-CSRCS += note_driver.c
-
-# Include note driver build support
-
-DEPPATH += --dep-path syslog
-VPATH += :syslog
-
-endif
diff --git a/libc/syslog/lib_syslogstream.c b/drivers/syslog/syslogstream.c
similarity index 88%
rename from libc/syslog/lib_syslogstream.c
rename to drivers/syslog/syslogstream.c
index 4c6cfa8c2e..f37f5942d4 100644
--- a/libc/syslog/lib_syslogstream.c
+++ b/drivers/syslog/syslogstream.c
@@ -1,7 +1,7 @@
 /****************************************************************************
- * libc/syslog/lib_syslogstream.c
+ * drivers/syslog/syslogstream.c
  *
- *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2012, 2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,14 +47,8 @@
 #include <nuttx/syslog/syslog.h>
 #include <nuttx/streams.h>
 
-#include "syslog/syslog.h"
-
 #ifdef CONFIG_SYSLOG
 
-/****************************************************************************
- * Pre-processor definition
- ****************************************************************************/
-
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -97,21 +91,22 @@ static void syslogstream_putc(FAR struct lib_outstream_s *this, int ch)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: lib_syslogstream
+ * Name: syslogstream
  *
  * Description:
  *   Initializes a stream for use with the configured syslog interface.
+ *   Only accessible from with the OS SYSLOG logic.
  *
  * Input parameters:
- *   lowoutstream - User allocated, uninitialized instance of struct
- *                  lib_lowoutstream_s to be initialized.
+ *   stream - User allocated, uninitialized instance of struct
+ *            lib_lowoutstream_s to be initialized.
  *
  * Returned Value:
  *   None (User allocated instance initialized).
  *
  ****************************************************************************/
 
-void lib_syslogstream(FAR struct lib_outstream_s *stream)
+void syslogstream(FAR struct lib_outstream_s *stream)
 {
   stream->put   = syslogstream_putc;
 #ifdef CONFIG_STDIO_LINEBUFFER
diff --git a/drivers/syslog/vlowsyslog.c b/drivers/syslog/vlowsyslog.c
new file mode 100644
index 0000000000..9cc2fc5c72
--- /dev/null
+++ b/drivers/syslog/vlowsyslog.c
@@ -0,0 +1,81 @@
+/****************************************************************************
+ * drivers/syslog/vlowsyslog.c
+ *
+ *   Copyright (C) 2007-2009, 2011-2012, 2016 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <syslog.h>
+
+#include <nuttx/streams.h>
+#include <nuttx/syslog/syslog.h>
+
+#if defined(CONFIG_ARCH_LOWPUTC) || defined(CONFIG_SYSLOG)
+/* The low-level SYSLOG functions can be used only if we have access to
+ * either the low-level serial interface, up_putc(), and to syslog_putc()
+ */
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: _vlowsyslog
+ *
+ * Description:
+ *   _vlowsyslog() handles the system logging system calls. It is functionally
+ *   equivalent to vlowsyslog() except that the pre-process priority filtering
+ *   has already been performed and, hence, there is no priority argument.
+ *
+ ****************************************************************************/
+
+int _vlowsyslog(FAR const IPTR char *fmt, va_list ap)
+{
+  struct lib_outstream_s stream;
+
+  /* Wrap the stdout in a stream object and let lib_vsprintf do the work. */
+
+#ifdef CONFIG_SYSLOG
+  syslogstream((FAR struct lib_outstream_s *)&stream);
+#else
+  lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
+#endif
+  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
+}
+
+#endif /* CONFIG_ARCH_LOWPUTC || CONFIG_SYSLOG */
diff --git a/drivers/syslog/vsyslog.c b/drivers/syslog/vsyslog.c
new file mode 100644
index 0000000000..557c71d1cc
--- /dev/null
+++ b/drivers/syslog/vsyslog.c
@@ -0,0 +1,195 @@
+/****************************************************************************
+ * drivers/syslog/vsyslog.c
+ *
+ *   Copyright (C) 2007-2009, 2011-2014, 2016 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <syslog.h>
+
+#include <nuttx/init.h>
+#include <nuttx/arch.h>
+#include <nuttx/clock.h>
+#include <nuttx/streams.h>
+#include <nuttx/syslog/syslog.h>
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: vsyslog_internal
+ *
+ * Description:
+ *   This is the internal implementation of vsyslog (see the description of
+ *   syslog and vsyslog below)
+ *
+ ****************************************************************************/
+
+static inline int vsyslog_internal(FAR const IPTR char *fmt, va_list ap)
+{
+#if defined(CONFIG_SYSLOG)
+  struct lib_outstream_s stream;
+#elif CONFIG_NFILE_DESCRIPTORS > 0
+  struct lib_rawoutstream_s stream;
+#elif defined(CONFIG_ARCH_LOWPUTC)
+  struct lib_outstream_s stream;
+#endif
+
+#if defined(CONFIG_SYSLOG_TIMESTAMP)
+  struct timespec ts;
+
+  /* Get the current time.  Since debug output may be generated very early
+   * in the start-up sequence, hardware timer support may not yet be
+   * available.
+   */
+
+  if (!OSINIT_HW_READY() || clock_systimespec(&ts) < 0)
+    {
+      /* Timer hardware is not available, or clock_systimespec failed */
+
+      ts.tv_sec  = 0;
+      ts.tv_nsec = 0;
+    }
+#endif
+
+#if defined(CONFIG_SYSLOG)
+  /* Wrap the low-level output in a stream object and let lib_vsprintf
+   * do the work.
+   */
+
+  syslogstream((FAR struct lib_outstream_s *)&stream);
+
+#if defined(CONFIG_SYSLOG_TIMESTAMP)
+  /* Pre-pend the message with the current time, if available */
+
+  (void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
+                    "[%6d.%06d]", ts.tv_sec, ts.tv_nsec/1000);
+
+#endif
+
+  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
+
+#elif CONFIG_NFILE_DESCRIPTORS > 0
+  /* Wrap the stdout in a stream object and let lib_vsprintf
+   * do the work.
+   */
+
+  lib_rawoutstream(&stream, 1);
+
+#if defined(CONFIG_SYSLOG_TIMESTAMP)
+  /* Pre-pend the message with the current time, if available */
+
+  (void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
+                    "[%6d.%06d]",  ts.tv_sec, ts.tv_nsec/1000);
+#endif
+
+  return lib_vsprintf(&stream.public, fmt, ap);
+
+#elif defined(CONFIG_ARCH_LOWPUTC)
+  /* Wrap the low-level output in a stream object and let lib_vsprintf
+   * do the work.
+   * REVISIT: lib_lowoutstream() is only available in the FLAT build or
+   * the kernel phase of other builds.   
+   */
+
+  lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
+
+#if defined(CONFIG_SYSLOG_TIMESTAMP)
+  /* Pre-pend the message with the current time, if available */
+
+  (void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
+                    "[%6d.%06d]", ts.tv_sec, ts.tv_nsec/1000);
+#endif
+
+  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
+
+#else /* CONFIG_SYSLOG */
+
+  return 0;
+
+#endif /* CONFIG_SYSLOG */
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: _vsyslog
+ *
+ * Description:
+ *   _vsyslog() handles the system logging system calls. It is functionally
+ *   equivalent to vsyslog() except that the pre-process priority filtering
+ *   has already been performed and, hence, there is no priority argument.
+ *
+ ****************************************************************************/
+
+int _vsyslog(FAR const IPTR char *fmt, va_list ap)
+{
+  int ret = 0;
+
+#if !defined(CONFIG_SYSLOG) && CONFIG_NFILE_DESCRIPTORS > 0
+  /* We are generating output on stdout.  So check if this function was
+   * called from an interrupt handler.  We cannot send data to stdout from
+   * an interrupt handler.
+   */
+
+  if (up_interrupt_context())
+    {
+#ifdef CONFIG_ARCH_LOWPUTC
+      /* But the low-level serial interface up_putc() is provided so we may
+       * be able to generate low-level serial output instead.
+       * NOTE: The low-level serial output is not necessarily the same
+       * output destination as stdout!
+       */
+
+      ret = _lowvsyslog(fmt, ap);
+
+#endif /* CONFIG_ARCH_LOWPUTC */
+    }
+  else
+#endif /* !CONFIG_SYSLOG && CONFIG_NFILE_DESCRIPTORS > 0 */
+    {
+      /* Let vsylog_internal do the deed */
+
+      ret = vsyslog_internal(fmt, ap);
+    }
+
+  return ret;
+}
diff --git a/include/nuttx/streams.h b/include/nuttx/streams.h
index ab57b33b35..f038991ee8 100644
--- a/include/nuttx/streams.h
+++ b/include/nuttx/streams.h
@@ -1,7 +1,7 @@
 /****************************************************************************
  * include/nuttx/streams.h
  *
- *   Copyright (C) 2009, 2011-2012, 2014-2015 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009, 2011-2012, 2014-2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -354,14 +354,15 @@ void lib_nullinstream(FAR struct lib_instream_s *nullinstream);
 void lib_nulloutstream(FAR struct lib_outstream_s *nulloutstream);
 
 /****************************************************************************
- * Name: lib_sylogstream
+ * Name: syslogstream
  *
  * Description:
  *   Initializes a stream for use with the configured syslog interface.
+ *   Only accessible from with the OS SYSLOG logic.
  *
  * Input parameters:
- *   lowoutstream - User allocated, uninitialized instance of struct
- *                  lib_lowoutstream_s to be initialized.
+ *   stream - User allocated, uninitialized instance of struct
+ *            lib_lowoutstream_s to be initialized.
  *
  * Returned Value:
  *   None (User allocated instance initialized).
@@ -369,7 +370,7 @@ void lib_nulloutstream(FAR struct lib_outstream_s *nulloutstream);
  ****************************************************************************/
 
 #ifdef CONFIG_SYSLOG
-void lib_syslogstream(FAR struct lib_outstream_s *stream);
+void syslogstream(FAR struct lib_outstream_s *stream);
 #endif
 
 /****************************************************************************
diff --git a/include/nuttx/syslog/syslog.h b/include/nuttx/syslog/syslog.h
index 836440da81..073d11646c 100644
--- a/include/nuttx/syslog/syslog.h
+++ b/include/nuttx/syslog/syslog.h
@@ -2,7 +2,7 @@
  * include/nuttx/syslog/syslog.h
  * The NuttX SYSLOGing interface
  *
- *   Copyright (C) 2012, 2014-2015 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2012, 2014-2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -128,6 +128,19 @@ int syslog_initialize(void);
 int syslog_putc(int ch);
 #endif
 
+/****************************************************************************
+ * Name: _vsyslog and _vlowsyslog
+ *
+ * Description:
+ *   _vsyslog() handles the system logging system calls. It is functionally
+ *   equivalent to vsyslog() except that the pre-process priority filtering
+ *   has already been performed and, hence, there is no priority argument.
+ *
+ ****************************************************************************/
+
+int _vsyslog(FAR const IPTR char *src, va_list ap);
+int _lowvsyslog(FAR const IPTR char *src, va_list ap);
+
 #undef EXTERN
 #ifdef __cplusplus
 }
diff --git a/include/sys/syscall.h b/include/sys/syscall.h
index 9fc12fa39c..389c11bf08 100644
--- a/include/sys/syscall.h
+++ b/include/sys/syscall.h
@@ -232,7 +232,7 @@
 
 /* Unconditional system logging */
 
-#define SYS_vsyslog                    (__SYS_syslog+0)
+#define SYS__vsyslog                   (__SYS_syslog+0)
 #define __SYS_descriptors              (__SYS_syslog+1)
 
 /* The following are defined if either file or socket descriptor are
diff --git a/libc/syslog/Make.defs b/libc/syslog/Make.defs
index 7ebdc907cf..907071a86b 100644
--- a/libc/syslog/Make.defs
+++ b/libc/syslog/Make.defs
@@ -37,10 +37,6 @@
 
 CSRCS += lib_syslog.c lib_lowsyslog.c lib_setlogmask.c
 
-ifeq ($(CONFIG_SYSLOG),y)
-CSRCS += lib_syslogstream.c
-endif
-
 # Add the syslog directory to the build
 
 DEPPATH += --dep-path syslog
diff --git a/libc/syslog/lib_lowsyslog.c b/libc/syslog/lib_lowsyslog.c
index 8c4b7ed959..5cd82c1463 100644
--- a/libc/syslog/lib_lowsyslog.c
+++ b/libc/syslog/lib_lowsyslog.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * lib/syslog/lib_lowsyslog.c
  *
- *   Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2011-2012, 2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -39,10 +39,9 @@
 
 #include <nuttx/config.h>
 
-#include <stdio.h>
 #include <syslog.h>
 
-#include <nuttx/streams.h>
+#include <nuttx/syslog/syslog.h>
 
 #include "syslog/syslog.h"
 
@@ -57,33 +56,6 @@
  * kernel two pass builds.
  */
 
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: lowvsyslog_internal
- *
- * Description:
- *   This is the internal implementation of lowvsyslog (see the description
- *   of lowsyslog and lowvsyslog below)
- *
- ****************************************************************************/
-
-static inline int lowvsyslog_internal(FAR const IPTR char *fmt, va_list ap)
-{
-  struct lib_outstream_s stream;
-
-  /* Wrap the stdout in a stream object and let lib_vsprintf do the work. */
-
-#ifdef CONFIG_SYSLOG
-  lib_syslogstream((FAR struct lib_outstream_s *)&stream);
-#else
-  lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
-#endif
-  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
-}
-
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -106,9 +78,9 @@ int lowvsyslog(int priority, FAR const IPTR char *fmt, va_list ap)
 
   if ((g_syslog_mask & LOG_MASK(priority)) != 0)
     {
-      /* Yes.. let vsylog_internal to the deed */
+      /* Perform the _lowvsyslog system call */
 
-      ret = lowvsyslog_internal(fmt, ap);
+      ret = _lowvsyslog(fmt, ap);
     }
 
   return ret;
diff --git a/libc/syslog/lib_syslog.c b/libc/syslog/lib_syslog.c
index 66f8b236f7..5ac55eb6b7 100644
--- a/libc/syslog/lib_syslog.c
+++ b/libc/syslog/lib_syslog.c
@@ -39,116 +39,12 @@
 
 #include <nuttx/config.h>
 
-#include <stdio.h>
 #include <syslog.h>
 
-#include <nuttx/init.h>
-#include <nuttx/arch.h>
-#include <nuttx/clock.h>
-#include <nuttx/streams.h>
+#include <nuttx/syslog/syslog.h>
 
 #include "syslog/syslog.h"
 
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: vsyslog_internal
- *
- * Description:
- *   This is the internal implementation of vsyslog (see the description of
- *   syslog and vsyslog below)
- *
- ****************************************************************************/
-
-static inline int vsyslog_internal(FAR const IPTR char *fmt, va_list ap)
-{
-#if defined(CONFIG_SYSLOG)
-  struct lib_outstream_s stream;
-#elif CONFIG_NFILE_DESCRIPTORS > 0
-  struct lib_rawoutstream_s stream;
-#elif defined(CONFIG_ARCH_LOWPUTC)
-  struct lib_outstream_s stream;
-#endif
-
-#if defined(CONFIG_SYSLOG_TIMESTAMP)
-  struct timespec ts;
-
-  /* Get the current time.  Since debug output may be generated very early
-   * in the start-up sequence, hardware timer support may not yet be
-   * available.
-   */
-
-  if (!OSINIT_HW_READY() || clock_systimespec(&ts) < 0)
-    {
-      /* Timer hardware is not available, or clock_systimespec failed */
-
-      ts.tv_sec  = 0;
-      ts.tv_nsec = 0;
-    }
-#endif
-
-#if defined(CONFIG_SYSLOG)
-  /* Wrap the low-level output in a stream object and let lib_vsprintf
-   * do the work.
-   * REVISIT: lib_syslogstream() is only available in the FLAT build or
-   * the kernel phase of other builds.   
-   */
-
-  lib_syslogstream((FAR struct lib_outstream_s *)&stream);
-
-#if defined(CONFIG_SYSLOG_TIMESTAMP)
-  /* Pre-pend the message with the current time, if available */
-
-  (void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
-                    "[%6d.%06d]", ts.tv_sec, ts.tv_nsec/1000);
-
-#endif
-
-  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
-
-#elif CONFIG_NFILE_DESCRIPTORS > 0
-  /* Wrap the stdout in a stream object and let lib_vsprintf
-   * do the work.
-   */
-
-  lib_rawoutstream(&stream, 1);
-
-#if defined(CONFIG_SYSLOG_TIMESTAMP)
-  /* Pre-pend the message with the current time, if available */
-
-  (void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
-                    "[%6d.%06d]",  ts.tv_sec, ts.tv_nsec/1000);
-#endif
-
-  return lib_vsprintf(&stream.public, fmt, ap);
-
-#elif defined(CONFIG_ARCH_LOWPUTC)
-  /* Wrap the low-level output in a stream object and let lib_vsprintf
-   * do the work.
-   * REVISIT: lib_lowoutstream() is only available in the FLAT build or
-   * the kernel phase of other builds.   
-   */
-
-  lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
-
-#if defined(CONFIG_SYSLOG_TIMESTAMP)
-  /* Pre-pend the message with the current time, if available */
-
-  (void)lib_sprintf((FAR struct lib_outstream_s *)&stream,
-                    "[%6d.%06d]", ts.tv_sec, ts.tv_nsec/1000);
-#endif
-
-  return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
-
-#else /* CONFIG_SYSLOG */
-
-  return 0;
-
-#endif /* CONFIG_SYSLOG */
-}
-
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -167,43 +63,13 @@ int vsyslog(int priority, FAR const IPTR char *fmt, va_list ap)
 {
   int ret = 0;
 
-#if defined(CONFIG_BUILD_FLAT) || defined (__KERNEL__)
-  /* up_interrupt_context() and lowvsyslog() are only available in the FLAT
-   * build or during the kernel pass of the protected or kernel two pass
-   * builds.
-   */
+  /* Check if this priority is enabled */
 
-#if !defined(CONFIG_SYSLOG) && CONFIG_NFILE_DESCRIPTORS > 0
-  /* We are generating output on stdout.  So check if this function was
-   * called from an interrupt handler.  We cannot send data to stdout from
-   * an interrupt handler.
-   */
-
-  if (up_interrupt_context())
+  if ((g_syslog_mask & LOG_MASK(priority)) != 0)
     {
-#ifdef CONFIG_ARCH_LOWPUTC
-      /* But the low-level serial interface up_putc() is provided so we may
-       * be able to generate low-level serial output instead.
-       * NOTE: The low-level serial output is not necessarily the same
-       * output destination as stdout!
-       */
+      /* Yes.. lPerform the _vsyslog system cal */
 
-      ret = lowvsyslog(priority, fmt, ap);
-
-#endif /* CONFIG_ARCH_LOWPUTC */
-    }
-  else
-#endif /* !CONFIG_SYSLOG && CONFIG_NFILE_DESCRIPTORS > 0 */
-#endif /* CONFIG_BUILD_FLAT || __KERNEL */
-    {
-      /* Check if this priority is enabled */
-
-      if ((g_syslog_mask & LOG_MASK(priority)) != 0)
-        {
-          /* Yes.. let vsylog_internal do the deed */
-
-          ret = vsyslog_internal(fmt, ap);
-        }
+      ret = _vsyslog(fmt, ap);
     }
 
   return ret;
diff --git a/libc/syslog/syslog.h b/libc/syslog/syslog.h
index 3188d3f2d6..31ad268770 100644
--- a/libc/syslog/syslog.h
+++ b/libc/syslog/syslog.h
@@ -41,7 +41,6 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#include <stdbool.h>
 
 /****************************************************************************
  * Public Data
diff --git a/syscall/syscall.csv b/syscall/syscall.csv
index 4579f3dedb..573de95364 100644
--- a/syscall/syscall.csv
+++ b/syscall/syscall.csv
@@ -159,7 +159,7 @@
 "up_assert","assert.h","","void","FAR const uint8_t*","int"
 #"up_assert","assert.h","","void"
 "vfork","unistd.h","defined(CONFIG_ARCH_HAVE_VFORK)","pid_t"
-"vsyslog","syslog.h","","int","int","FAR const IPTR char*","va_list"
+"_vsyslog","syslog.h","","int","FAR const IPTR char*","va_list"
 "wait","sys/wait.h","defined(CONFIG_SCHED_WAITPID) && defined(CONFIG_SCHED_HAVE_PARENT)","pid_t","int*"
 "waitid","sys/wait.h","defined(CONFIG_SCHED_WAITPID) && defined(CONFIG_SCHED_HAVE_PARENT)","int","idtype_t","id_t"," FAR siginfo_t *","int"
 "waitpid","sys/wait.h","defined(CONFIG_SCHED_WAITPID)","pid_t","pid_t","int*","int"
diff --git a/syscall/syscall_funclookup.c b/syscall/syscall_funclookup.c
index 7d4cbc5ef6..8e62470103 100644
--- a/syscall/syscall_funclookup.c
+++ b/syscall/syscall_funclookup.c
@@ -72,7 +72,6 @@
 #include <signal.h>
 #include <mqueue.h>
 #include <spawn.h>
-#include <syslog.h>
 #include <assert.h>
 
 /* Errno access is awkward. We need to generate get_errno() and set_errno()
diff --git a/syscall/syscall_lookup.h b/syscall/syscall_lookup.h
index cc72809fd0..2194a6e644 100644
--- a/syscall/syscall_lookup.h
+++ b/syscall/syscall_lookup.h
@@ -165,7 +165,7 @@ SYSCALL_LOOKUP(up_assert,                 2, STUB_up_assert)
 
 /* System logging */
 
-  SYSCALL_LOOKUP(vsyslog,                 3, STUB_vsyslog)
+  SYSCALL_LOOKUP(_vsyslog,                2, STUB__vsyslog)
 
 /* The following are defined if either file or socket descriptor are
  * enabled.
diff --git a/syscall/syscall_stublookup.c b/syscall/syscall_stublookup.c
index 0c0c589fef..c587401b57 100644
--- a/syscall/syscall_stublookup.c
+++ b/syscall/syscall_stublookup.c
@@ -167,8 +167,7 @@ uintptr_t STUB_timer_settime(int nbr, uintptr_t parm1, uintptr_t parm2,
 
 /* System logging */
 
-uintptr_t STUB_vsyslog(int nbr, uintptr_t parm1, uintptr_t parm2,
-            uintptr_t parm3);
+uintptr_t STUB__vsyslog(int nbr, uintptr_t parm1, uintptr_t parm2);
 
 /* The following are defined if either file or socket descriptor are
  * enabled.