10 files changed, 12 insertions, 39 deletions

diff --git a/include/dirent.h b/include/dirent.h
index f6e4ccd53c19..d686dafc8e9f 100644
--- a/include/dirent.h
+++ b/include/dirent.h
@@ -54,6 +54,8 @@
 
 #if __BSD_VISIBLE
 
+#include <sys/_null.h>
+
 /* definitions for library routines operating on directories. */
 #define	DIRBLKSIZ	1024
 
@@ -81,10 +83,6 @@ typedef struct _dirdesc {
 #define DTF_REWIND	0x0004	/* rewind after reading union stack */
 #define __DTF_READALL	0x0008	/* everything has been read */
 
-#ifndef NULL
-#define	NULL	0
-#endif
-
 #else /* !__BSD_VISIBLE */
 
 typedef	void *	DIR;
diff --git a/include/locale.h b/include/locale.h
index 2477db4a3af4..ba702140a4ec 100644
--- a/include/locale.h
+++ b/include/locale.h
@@ -37,6 +37,8 @@
 #ifndef _LOCALE_H_
 #define _LOCALE_H_
 
+#include <sys/_null.h>
+
 struct lconv {
 	char	*decimal_point;
 	char	*thousands_sep;
@@ -64,10 +66,6 @@ struct lconv {
 	char	int_n_sign_posn;
 };
 
-#ifndef NULL
-#define	NULL	0
-#endif
-
 #define	LC_ALL		0
 #define	LC_COLLATE	1
 #define	LC_CTYPE	2
diff --git a/include/rpc/types.h b/include/rpc/types.h
index 4a5c6564b270..58d22a8a5416 100644
--- a/include/rpc/types.h
+++ b/include/rpc/types.h
@@ -40,6 +40,7 @@
 #define _RPC_TYPES_H
 
 #include <sys/types.h>
+#include <sys/_null.h>
 
 typedef int32_t bool_t;
 typedef int32_t enum_t;
@@ -59,9 +60,6 @@ typedef   int32_t rpc_inline_t;
 #ifndef TRUE
 #	define TRUE	(1)
 #endif
-#ifndef NULL
-#	define NULL	0
-#endif
 
 #define mem_alloc(bsize)	calloc(1, bsize)
 #define mem_free(ptr, bsize)	free(ptr)
diff --git a/include/stddef.h b/include/stddef.h
index e9f5a845ab9b..dd7362129323 100644
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -39,6 +39,7 @@
 #define _STDDEF_H_
 
 #include <sys/cdefs.h>
+#include <sys/_null.h>
 #include <sys/_types.h>
 
 typedef	__ptrdiff_t	ptrdiff_t;
@@ -62,10 +63,6 @@ typedef	__wchar_t	wchar_t;
 #endif
 #endif
 
-#ifndef	NULL
-#define	NULL	0
-#endif
-
 #define	offsetof(type, member)	__offsetof(type, member)
 
 #endif /* _STDDEF_H_ */
diff --git a/include/stdio.h b/include/stdio.h
index 72f07eae7684..58f49958be25 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -41,6 +41,7 @@
 #define	_STDIO_H_
 
 #include <sys/cdefs.h>
+#include <sys/_null.h>
 #include <sys/_types.h>
 
 typedef	__off_t		fpos_t;
@@ -57,10 +58,6 @@ typedef	__va_list	va_list;
 #endif
 #endif
 
-#ifndef NULL
-#define	NULL	0
-#endif
-
 #define	_FSTDIO			/* Define for new stdio with functions. */
 
 /*
diff --git a/include/stdlib.h b/include/stdlib.h
index 39dc46994c1b..23e64090b2d2 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -38,6 +38,7 @@
 #define	_STDLIB_H_
 
 #include <sys/cdefs.h>
+#include <sys/_null.h>
 #include <sys/_types.h>
 
 #if __BSD_VISIBLE
@@ -69,10 +70,6 @@ typedef struct {
 	long	rem;
 } ldiv_t;
 
-#ifndef NULL
-#define	NULL	0
-#endif
-
 #define	EXIT_FAILURE	1
 #define	EXIT_SUCCESS	0
 
diff --git a/include/string.h b/include/string.h
index 3580e8defde9..9a38656b2600 100644
--- a/include/string.h
+++ b/include/string.h
@@ -38,6 +38,7 @@
 #define	_STRING_H_
 
 #include <sys/cdefs.h>
+#include <sys/_null.h>
 #include <sys/_types.h>
 
 /*
@@ -53,10 +54,6 @@ typedef	__size_t	size_t;
 #define	_SIZE_T_DECLARED
 #endif
 
-#ifndef	NULL
-#define	NULL	0
-#endif
-
 __BEGIN_DECLS
 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
 void	*memccpy(void * __restrict, const void * __restrict, int, size_t);
diff --git a/include/time.h b/include/time.h
index c7ba4f0f17b8..7a107905b59f 100644
--- a/include/time.h
+++ b/include/time.h
@@ -46,6 +46,7 @@
 #define	_TIME_H_
 
 #include <sys/cdefs.h>
+#include <sys/_null.h>
 #include <sys/_types.h>
 
 #if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE
@@ -59,10 +60,6 @@
 /* Frequency of the clock ticks reported by clock().  */
 #define	CLOCKS_PER_SEC	128
 
-#ifndef	NULL
-#define	NULL	0
-#endif
-
 #ifndef _CLOCK_T_DECLARED
 typedef	__clock_t	clock_t;
 #define	_CLOCK_T_DECLARED
diff --git a/include/unistd.h b/include/unistd.h
index 8cd8edcd49be..da1438a436e7 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -40,6 +40,7 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>			/* XXX adds too much pollution. */
 #include <sys/unistd.h>
+#include <sys/_null.h>
 #include <sys/_types.h>
 
 #ifndef _GID_T_DECLARED
@@ -81,10 +82,6 @@ typedef	__useconds_t	useconds_t;
 #define	STDOUT_FILENO	1	/* standard output file descriptor */
 #define	STDERR_FILENO	2	/* standard error file descriptor */
 
-#ifndef NULL
-#define	NULL		0	/* null pointer constant */
-#endif
-
 #if __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
 #define	F_ULOCK		0	/* unlock locked section */
 #define	F_LOCK		1	/* lock a section for exclusive use */
diff --git a/include/wchar.h b/include/wchar.h
index 2b51040dbad5..b8bb90a14a4b 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -68,13 +68,10 @@
 #define _WCHAR_H_
 
 #include <sys/cdefs.h>
+#include <sys/_null.h>
 #include <sys/_types.h>
 #include <machine/_limits.h>
 
-#ifndef NULL
-#define	NULL	0
-#endif
-
 #ifndef _MBSTATE_T_DECLARED
 typedef	__mbstate_t	mbstate_t;
 #define	_MBSTATE_T_DECLARED