diff --git a/include/sys/syscall.h b/include/sys/syscall.h
index 636c918e38..755162a744 100644
--- a/include/sys/syscall.h
+++ b/include/sys/syscall.h
@@ -82,29 +82,23 @@
 #define SYS_sched_yield                (CONFIG_SYS_RESERVED+12)
 #define SYS_set_errno                  (CONFIG_SYS_RESERVED+13)
 
-/* SYSLOG */
-
-#define SYS_syslog                     (CONFIG_SYS_RESERVED+14)
-#define SYS_lowsyslog                  (CONFIG_SYS_RESERVED+15)
-#define SYS_setlogmask                 (CONFIG_SYS_RESERVED+16)
-
 /* Semaphores */
 
-#define SYS_sem_destroy                (CONFIG_SYS_RESERVED+17)
-#define SYS_sem_post                   (CONFIG_SYS_RESERVED+18)
-#define SYS_sem_timedwait              (CONFIG_SYS_RESERVED+19)
-#define SYS_sem_trywait                (CONFIG_SYS_RESERVED+20)
-#define SYS_sem_wait                   (CONFIG_SYS_RESERVED+21)
+#define SYS_sem_destroy                (CONFIG_SYS_RESERVED+14)
+#define SYS_sem_post                   (CONFIG_SYS_RESERVED+15)
+#define SYS_sem_timedwait              (CONFIG_SYS_RESERVED+16)
+#define SYS_sem_trywait                (CONFIG_SYS_RESERVED+17)
+#define SYS_sem_wait                   (CONFIG_SYS_RESERVED+18)
 
 /* Named semaphores */
 
 #ifdef CONFIG_FS_NAMED_SEMAPHORES
-#  define SYS_sem_open                 (CONFIG_SYS_RESERVED+22)
-#  define SYS_sem_close                (CONFIG_SYS_RESERVED+23)
-#  define SYS_sem_unlink               (CONFIG_SYS_RESERVED+24)
-#  define __SYS_task_create            (CONFIG_SYS_RESERVED+25)
-#else
+#  define SYS_sem_open                 (CONFIG_SYS_RESERVED+19)
+#  define SYS_sem_close                (CONFIG_SYS_RESERVED+20)
+#  define SYS_sem_unlink               (CONFIG_SYS_RESERVED+21)
 #  define __SYS_task_create            (CONFIG_SYS_RESERVED+22)
+#else
+#  define __SYS_task_create            (CONFIG_SYS_RESERVED+19)
 #endif
 
 /* Task creation APIs based on global entry points cannot be use with
diff --git a/include/syslog.h b/include/syslog.h
index 7d163e30fa..261c8dfc64 100644
--- a/include/syslog.h
+++ b/include/syslog.h
@@ -49,25 +49,6 @@
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
-/* Configuration ************************************************************/
-/* Some interfaces in this file are currently only available within the
- * kernel.  They could are available to applications in the flat build and
- * could be made available in the protected and kernel builds IF system
- * calls were added.
- *
- * REVISIT: For example, I don't yet know how to pass a va_list in a system
- * call so none of those interfaces.
- *
- * NOTE: In protected and kernel builds, there may also be a limit to the
- * number of parameters that are supported in the variable parameter list.
- */
-
-#if !defined(CONFIG_BUILD_PROTECTED) && !defined(CONFIG_BUILD_KERNEL)
-#  undef __KERNEL__
-#  define __KERNEL__ 1
-#endif
-
-/* syslog interface *********************************************************/
 /* The option argument to openlog() is an OR of any of these:
  *
  *   LOG_CONS     - Write directly to system console if there is an error
@@ -156,9 +137,7 @@ void closelog(void);
  */
 
 int syslog(int priority, FAR const char *format, ...);
-#ifdef __KERNEL__
 int vsyslog(int priority, FAR const char *src, va_list ap);
-#endif
 
 #ifdef CONFIG_ARCH_LOWPUTC
 /* These are non-standard, low-level system logging interface.  The
@@ -172,9 +151,7 @@ int vsyslog(int priority, FAR const char *src, va_list ap);
  */
 
 int lowsyslog(int priority, FAR const char *format, ...);
-#  ifdef __KERNEL__
 int lowvsyslog(int priority, FAR const char *format, va_list ap);
-#  endif
 
 #else
 /* If the platform cannot support lowsyslog, then we will substitute the
@@ -188,9 +165,7 @@ int lowvsyslog(int priority, FAR const char *format, va_list ap);
 #  else
 #    define lowsyslog (void)
 #  endif
-#  ifdef __KERNEL__
-#   define lowvsyslog(p,f,a) vsyslog(p,f,a)
-#  endif
+#  define lowvsyslog(p,f,a) vsyslog(p,f,a)
 #endif
 
 /* The setlogmask() function sets the logmask and returns the previous
diff --git a/libc/libc.csv b/libc/libc.csv
index 4d05a2af65..1a6e38cac7 100644
--- a/libc/libc.csv
+++ b/libc/libc.csv
@@ -65,6 +65,8 @@
 "llabs","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","long long int","long long int"
 "lldbg","debug.h","!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG) && defined(CONFIG_ARCH_LOWPUTC)","int","const char *","..."
 "llvdbg","debug.h","!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_ARCH_LOWPUTC)","int","const char *","..."
+"lowsyslog","syslog.h","","int","int","FAR const char *","..."
+"lowvsyslog","syslog.h","","int","int","FAR const char *","va_list"
 "match","nuttx/regex.h","","int","const char *","const char *"
 "memccpy","string.h","","FAR void","FAR void *","FAR const void *","int c","size_t"
 "memchr","string.h","","FAR void","FAR const void *","int c","size_t"
@@ -110,6 +112,7 @@
 "sem_getvalue","semaphore.h","","int","FAR sem_t *","FAR int *"
 "sem_init","semaphore.h","","int","FAR sem_t *","int","unsigned int"
 "sendfile","sys/sendfile.h","CONFIG_NSOCKET_DESCRIPTORS > 0 || CONFIG_NFILE_DESCRIPTORS > 0","ssize_t","int","int","off_t","size_t"
+"setlogmask","syslog.h","","int","int"
 "sigaddset","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR sigset_t *","int"
 "sigdelset","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR sigset_t *","int"
 "sigemptyset","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","FAR sigset_t *"
@@ -154,6 +157,7 @@
 "strtoll","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","long long","const char *nptr","char **endptr","int base"
 "strtoul","stdlib.h","","unsigned long","const char *","char **","int"
 "strtoull","stdlib.h","defined(CONFIG_HAVE_LONG_LONG)","unsigned long long","const char *","char **","int"
+"syslog","syslog.h","","int","int","FAR const char *","..."
 "tcflush","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","int","int","int"
 "tcgetattr","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","int","int","FAR struct termios *"
 "tcsetattr","termios.h","CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_SERIAL_TERMIOS)","int","int","int","FAR const struct termios *"
@@ -169,3 +173,4 @@
 "vsnprintf","stdio.h","","int","FAR char *","size_t","const char *","va_list"
 "vsprintf","stdio.h","","int","FAR char *","const char *","va_list"
 "vsscanf","stdio.h","","int","char *","const char *","va_list"
+"vsyslog","syslog.h","","int","int","FAR const char *","va_list"
diff --git a/syscall/syscall.csv b/syscall/syscall.csv
index dd002aa99e..1831c652cd 100644
--- a/syscall/syscall.csv
+++ b/syscall/syscall.csv
@@ -29,7 +29,6 @@
 "ioctl","sys/ioctl.h","CONFIG_NSOCKET_DESCRIPTORS > 0 || CONFIG_NFILE_DESCRIPTORS > 0","int","int","int","unsigned long"
 "kill","signal.h","!defined(CONFIG_DISABLE_SIGNALS)","int","pid_t","int"
 "listen","sys/socket.h","CONFIG_NSOCKET_DESCRIPTORS > 0 && defined(CONFIG_NET)","int","int","int"
-"lowsyslog","syslog.h","","int","int","FAR const char *","..."
 "lseek","unistd.h","CONFIG_NFILE_DESCRIPTORS > 0","off_t","int","off_t","int"
 "mkdir","sys/stat.h","CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_MOUNTPOINT)","int","FAR const char*","mode_t"
 "mkfifo","sys/stat.h","CONFIG_NFILE_DESCRIPTORS > 0","int","FAR const char*","mode_t"
@@ -119,7 +118,6 @@
 "sendto","sys/socket.h","CONFIG_NSOCKET_DESCRIPTORS > 0 && defined(CONFIG_NET)","ssize_t","int","FAR const void*","size_t","int","FAR const struct sockaddr*","socklen_t"
 "set_errno","errno.h","","void","int"
 "setenv","stdlib.h","!defined(CONFIG_DISABLE_ENVIRON)","int","const char*","const char*","int"
-"setlogmask","syslog.h","","int","int"
 "setsockopt","sys/socket.h","CONFIG_NSOCKET_DESCRIPTORS > 0 && defined(CONFIG_NET)","int","int","int","int","FAR const void*","socklen_t"
 "shmat", "sys/shm.h", "defined(CONFIG_MM_SHM)", "FAR void *", "int", "FAR const void *", "int"
 "shmctl", "sys/shm.h", "defined(CONFIG_MM_SHM)", "int", "int", "int", "FAR struct shmid_ds *"
@@ -136,7 +134,6 @@
 "stat","sys/stat.h","CONFIG_NFILE_DESCRIPTORS > 0","int","const char*","FAR struct stat*"
 #"statfs","stdio.h","","int","FAR const char*","FAR struct statfs*"
 "statfs","sys/statfs.h","CONFIG_NFILE_DESCRIPTORS > 0","int","const char*","struct statfs*"
-"syslog","syslog.h","","int","int","FAR const char *","..."
 "task_create","sched.h","!defined(CONFIG_BUILD_KERNEL)", "int","FAR const char*","int","int","main_t","FAR char * const []|FAR char * const *"
 #"task_create","sched.h","","int","const char*","int","main_t","FAR char * const []|FAR char * const *"
 "task_delete","sched.h","","int","pid_t"
diff --git a/syscall/syscall_lookup.h b/syscall/syscall_lookup.h
index 5a5e1a95b3..1c640d0b39 100644
--- a/syscall/syscall_lookup.h
+++ b/syscall/syscall_lookup.h
@@ -58,12 +58,6 @@ SYSCALL_LOOKUP(sched_unlock,              0, STUB_sched_unlock)
 SYSCALL_LOOKUP(sched_yield,               0, STUB_sched_yield)
 SYSCALL_LOOKUP(set_errno,                 1, STUB_set_errno)
 
-/* SYSLOG */
-
-SYSCALL_LOOKUP(syslog,                    6, SYS_syslog)
-SYSCALL_LOOKUP(lowsyslog,                 6, SYS_lowsyslog)
-SYSCALL_LOOKUP(setlogmask,                1, SYS_setlogmask)
-
 /* Semaphores */
 
 SYSCALL_LOOKUP(sem_destroy,               2, STUB_sem_destroy)
diff --git a/syscall/syscall_stublookup.c b/syscall/syscall_stublookup.c
index 24471c4e86..6068021b7e 100644
--- a/syscall/syscall_stublookup.c
+++ b/syscall/syscall_stublookup.c
@@ -76,14 +76,6 @@ uintptr_t STUB_sched_setscheduler(int nbr, uintptr_t parm1, uintptr_t parm2,
 uintptr_t STUB_sched_unlock(int nbr);
 uintptr_t STUB_sched_yield(int nbr);
 
-/* SYSLOG */
-
-uintptr_t STUB_syslog(int nbr, uintptr_t parm1, uintptr_t parm2,
-            uintptr_t parm3, uintptr_t parm4, uintptr_t parm5, uintptr_t parm6);
-uintptr_t STUB_lowsyslog(int nbr, uintptr_t parm1, uintptr_t parm2,
-            uintptr_t parm3, uintptr_t parm4, uintptr_t parm5, uintptr_t parm6);
-uintptr_t STUB_setlogmask(int nbr, uintptr_t parm1);
-
 /* Semaphores */
 
 uintptr_t STUB_sem_close(int nbr, uintptr_t parm1);