Remove __need_list_t and __need_res_state.

These __need macros are only used internally, by nptl/descr.h.
However, including all of resolv.h from descr.h causes build failures
due to resolv.h's dozens of pseudo-struct-field macros, some of which
collide with struct fields in NPTL internal data structures.
Similarly, including all of list.h from descr.h produces an include
cycle, atomic.h -> atomic-machine.h -> tls.h -> descr.h -> list.h ->
atomic.h, and then list.h tries to use atomic.h macros that haven't
been defined yet.  So we do need mini-headers for these.  In the
list.h case I called it include/list_t.h since it isn't going to be
installed.

	* resolv/resolv.h: Remove __need_res_state logic.
	Move definition of res_state and related constants to ...
	* resolv/bits/types/res_state.h: ...this new file.
	* resolv/Makefile: Install bits/types/res_state.h.
	* include/bits/types/res_state.h: New wrapper.
	* include/list.h: Remove __need_list_t logic.
	Move definition of list_t to ...
	* include/list_t.h: ...this new file.

	* nptl/descr.h: Include list_t.h and bits/types/res_state.h
	instead of list.h and resolv.h.

3 files changed, 77 insertions, 78 deletions

diff --git a/resolv/Makefile b/resolv/Makefile
index d41fd4603d..70b6f4ffe8 100644
--- a/resolv/Makefile
+++ b/resolv/Makefile
@@ -22,7 +22,7 @@ subdir	:= resolv
 
 include ../Makeconfig
 
-headers	:= resolv.h \
+headers	:= resolv.h bits/types/res_state.h \
 	   netdb.h bits/netdb.h \
 	   arpa/nameser.h arpa/nameser_compat.h \
 	   sys/bitypes.h
diff --git a/resolv/bits/types/res_state.h b/resolv/bits/types/res_state.h
new file mode 100644
index 0000000000..cee4b6ddd0
--- /dev/null
+++ b/resolv/bits/types/res_state.h
@@ -0,0 +1,61 @@
+#ifndef __res_state_defined
+#define __res_state_defined 1
+
+#include <sys/types.h>
+#include <netinet/in.h>
+
+/* res_state: the global state used by the resolver stub.  */
+#define MAXNS			3	/* max # name servers we'll track */
+#define MAXDFLSRCH		3	/* # default domain levels to try */
+#define MAXDNSRCH		6	/* max # domains in search path */
+#define MAXRESOLVSORT		10	/* number of net to sort on */
+
+struct __res_state {
+	int	retrans;		/* retransmition time interval */
+	int	retry;			/* number of times to retransmit */
+	unsigned long options;		/* option flags - see below. */
+	int	nscount;		/* number of name servers */
+	struct sockaddr_in
+		nsaddr_list[MAXNS];	/* address of name server */
+	unsigned short id;		/* current message id */
+	/* 2 byte hole here.  */
+	char	*dnsrch[MAXDNSRCH+1];	/* components of domain to search */
+	char	defdname[256];		/* default domain (deprecated) */
+	unsigned long pfcode;		/* RES_PRF_ flags - see below. */
+	unsigned ndots:4;		/* threshold for initial abs. query */
+	unsigned nsort:4;		/* number of elements in sort_list[] */
+	unsigned ipv6_unavail:1;	/* connecting to IPv6 server failed */
+	unsigned unused:23;
+	struct {
+		struct in_addr	addr;
+		uint32_t	mask;
+	} sort_list[MAXRESOLVSORT];
+	/* 4 byte hole here on 64-bit architectures.  */
+	void * __glibc_unused_qhook;
+	void * __glibc_unused_rhook;
+	int	res_h_errno;		/* last one set for this context */
+	int	_vcsock;		/* PRIVATE: for res_send VC i/o */
+	unsigned int _flags;		/* PRIVATE: see below */
+	/* 4 byte hole here on 64-bit architectures.  */
+	union {
+		char	pad[52];	/* On an i386 this means 512b total. */
+		struct {
+			uint16_t		nscount;
+			uint16_t		nsmap[MAXNS];
+			int			nssocks[MAXNS];
+			uint16_t		nscount6;
+			uint16_t		nsinit;
+			struct sockaddr_in6	*nsaddrs[MAXNS];
+#ifdef _LIBC
+			unsigned long long int	initstamp
+			  __attribute__((packed));
+#else
+			unsigned int		_initstamp[2];
+#endif
+		} _ext;
+	} _u;
+};
+
+typedef struct __res_state *res_state;
+
+#endif /* __res_state_defined */
diff --git a/resolv/resolv.h b/resolv/resolv.h
index 9fef8e9f24..1fb0ad459c 100644
--- a/resolv/resolv.h
+++ b/resolv/resolv.h
@@ -50,92 +50,30 @@
  */
 
 #ifndef _RESOLV_H_
+#define _RESOLV_H_
 
-/* These headers are needed for types used in the `struct res_state'
-   declaration.  */
+#include <sys/cdefs.h>
+#include <sys/param.h>
 #include <sys/types.h>
+#include <stdio.h>
 #include <netinet/in.h>
-
-#ifndef __need_res_state
-# define _RESOLV_H_
-
-# include <sys/param.h>
-# include <sys/cdefs.h>
-# include <stdio.h>
-# include <arpa/nameser.h>
-#endif
-
-#ifndef __res_state_defined
-# define __res_state_defined
+#include <arpa/nameser.h>
+#include <bits/types/res_state.h>
 
 /*
  * Global defines and variables for resolver stub.
  */
-# define MAXNS			3	/* max # name servers we'll track */
-# define MAXDFLSRCH		3	/* # default domain levels to try */
-# define MAXDNSRCH		6	/* max # domains in search path */
-# define LOCALDOMAINPARTS	2	/* min levels in name that is "local" */
-
-# define RES_TIMEOUT		5	/* min. seconds between retries */
-# define MAXRESOLVSORT		10	/* number of net to sort on */
-# define RES_MAXNDOTS		15	/* should reflect bit field size */
-# define RES_MAXRETRANS		30	/* only for resolv.conf/RES_OPTIONS */
-# define RES_MAXRETRY		5	/* only for resolv.conf/RES_OPTIONS */
-# define RES_DFLRETRY		2	/* Default #/tries. */
-# define RES_MAXTIME		65535	/* Infinity, in milliseconds. */
+#define LOCALDOMAINPARTS	2	/* min levels in name that is "local" */
 
-struct __res_state {
-	int	retrans;		/* retransmition time interval */
-	int	retry;			/* number of times to retransmit */
-	unsigned long options;		/* option flags - see below. */
-	int	nscount;		/* number of name servers */
-	struct sockaddr_in
-		nsaddr_list[MAXNS];	/* address of name server */
-# define nsaddr	nsaddr_list[0]		/* for backward compatibility */
-	unsigned short id;		/* current message id */
-	/* 2 byte hole here.  */
-	char	*dnsrch[MAXDNSRCH+1];	/* components of domain to search */
-	char	defdname[256];		/* default domain (deprecated) */
-	unsigned long pfcode;		/* RES_PRF_ flags - see below. */
-	unsigned ndots:4;		/* threshold for initial abs. query */
-	unsigned nsort:4;		/* number of elements in sort_list[] */
-	unsigned ipv6_unavail:1;	/* connecting to IPv6 server failed */
-	unsigned unused:23;
-	struct {
-		struct in_addr	addr;
-		uint32_t	mask;
-	} sort_list[MAXRESOLVSORT];
-	/* 4 byte hole here on 64-bit architectures.  */
-	void * __glibc_unused_qhook;
-	void * __glibc_unused_rhook;
-	int	res_h_errno;		/* last one set for this context */
-	int	_vcsock;		/* PRIVATE: for res_send VC i/o */
-	unsigned int _flags;		/* PRIVATE: see below */
-	/* 4 byte hole here on 64-bit architectures.  */
-	union {
-		char	pad[52];	/* On an i386 this means 512b total. */
-		struct {
-			uint16_t		nscount;
-			uint16_t		nsmap[MAXNS];
-			int			nssocks[MAXNS];
-			uint16_t		nscount6;
-			uint16_t		nsinit;
-			struct sockaddr_in6	*nsaddrs[MAXNS];
-#ifdef _LIBC
-			unsigned long long int	initstamp
-			  __attribute__((packed));
-#else
-			unsigned int		_initstamp[2];
-#endif
-		} _ext;
-	} _u;
-};
+#define RES_TIMEOUT		5	/* min. seconds between retries */
+#define RES_MAXNDOTS		15	/* should reflect bit field size */
+#define RES_MAXRETRANS		30	/* only for resolv.conf/RES_OPTIONS */
+#define RES_MAXRETRY		5	/* only for resolv.conf/RES_OPTIONS */
+#define RES_DFLRETRY		2	/* Default #/tries. */
+#define RES_MAXTIME		65535	/* Infinity, in milliseconds. */
 
-typedef struct __res_state *res_state;
-# undef __need_res_state
-#endif
+#define nsaddr	nsaddr_list[0]		/* for backward compatibility */
 
-#ifdef _RESOLV_H_
 /*
  * Revision information.  This is the release date in YYYYMMDD format.
  * It can change every day so the right thing to do with it is use it
@@ -361,7 +299,7 @@ int		res_nmkquery (res_state, int, const char *, int, int,
 int		res_nsend (res_state, const unsigned char *, int,
 			   unsigned char *, int) __THROW;
 void		res_nclose (res_state) __THROW;
+
 __END_DECLS
-#endif
 
 #endif /* !_RESOLV_H_ */