* init.c: Make it compile with older kernel headers.

	* tst-initializers1.c: Show through exit code which test failed.

	* pthread_rwlock_init.c: Also initialize __shared field.
	* sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h: Split __flags
	element in rwlock structure into four byte elements.  One of them is
	the new __shared element.
	* sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h [__WORDSIZE=32]:
	Likewise.
	[__WORDSIZE=64]: Renamed __pad1 element int rwlock structire to
	__shared, adjust names of other padding elements.
	* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Likewise.
	* sysdeps/pthread/pthread.h: Adjust rwlock initializers.
	* sysdeps/unix/sysv/linux/lowlevelrwlock.sym: Add PSHARED.
	* sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: Define
	FUTEX_PRIVATE_FLAG.
	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S: Change main
	futex to use private operations if possible.
	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S:
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S:
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S: Likewise.

6 files changed, 34 insertions, 13 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h b/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h
index f53d0e5a72..9e3e016fb8 100644
--- a/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h
+++ b/nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2002,2003,2004,2005,2006,2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -128,7 +128,10 @@ typedef union
     unsigned int __nr_writers_queued;
     /* FLAGS must stay at this position in the structure to maintain
        binary compatibility.  */
-    unsigned int __flags;
+    unsigned char __flags;
+    unsigned char __shared;
+    unsigned char __pad1;
+    unsigned char __pad2;
     int __writer;
   } __data;
   char __size[__SIZEOF_PTHREAD_RWLOCK_T];
diff --git a/nptl/sysdeps/unix/sysv/linux/lowlevelrwlock.sym b/nptl/sysdeps/unix/sysv/linux/lowlevelrwlock.sym
index e82c878d39..f50b25bfb8 100644
--- a/nptl/sysdeps/unix/sysv/linux/lowlevelrwlock.sym
+++ b/nptl/sysdeps/unix/sysv/linux/lowlevelrwlock.sym
@@ -1,6 +1,7 @@
 #include <stddef.h>
 #include <stdio.h>
 #include <bits/pthreadtypes.h>
+#include <bits/wordsize.h>
 
 --
 
@@ -12,3 +13,4 @@ READERS_QUEUED	offsetof (pthread_rwlock_t, __data.__nr_readers_queued)
 WRITERS_QUEUED	offsetof (pthread_rwlock_t, __data.__nr_writers_queued)
 FLAGS		offsetof (pthread_rwlock_t, __data.__flags)
 WRITER		offsetof (pthread_rwlock_t, __data.__writer)
+PSHARED		offsetof (pthread_rwlock_t, __data.__shared)
diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h b/nptl/sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h
index a7150f6aef..c0b59c336f 100644
--- a/nptl/sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h
+++ b/nptl/sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h
@@ -1,5 +1,5 @@
 /* Machine-specific pthread type layouts.  PowerPC version.
-   Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
 
@@ -160,9 +160,9 @@ typedef union
     unsigned int __nr_readers_queued;
     unsigned int __nr_writers_queued;
     int __writer;
-    int __pad1;
+    int __shared;
+    unsigned long int __pad1;
     unsigned long int __pad2;
-    unsigned long int __pad3;
     /* FLAGS must stay at this position in the structure to maintain
        binary compatibility.  */
     unsigned int __flags;
@@ -176,9 +176,12 @@ typedef union
     unsigned int __writer_wakeup;
     unsigned int __nr_readers_queued;
     unsigned int __nr_writers_queued;
+    unsigned char __pad1;
+    unsigned char __pad2;
+    unsigned char __shared;
     /* FLAGS must stay at this position in the structure to maintain
        binary compatibility.  */
-    unsigned int __flags;
+    unsigned char __flags;
     int __writer;
   } __data;
 # endif
diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
index 239f4ddf55..71fede8384 100644
--- a/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/powerpc/lowlevellock.h
@@ -37,6 +37,8 @@
 #define FUTEX_LOCK_PI		6
 #define FUTEX_UNLOCK_PI		7
 #define FUTEX_TRYLOCK_PI	8
+#define FUTEX_PRIVATE_FLAG	128
+
 
 /* Initializer for compatibility lock.	*/
 #define LLL_MUTEX_LOCK_INITIALIZER (0)
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h b/nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h
index 693387a266..7a09c81194 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2002,2003,2004,2005,2006,2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -159,9 +159,9 @@ typedef union
     unsigned int __nr_readers_queued;
     unsigned int __nr_writers_queued;
     int __writer;
-    int __pad1;
+    int __shared;
+    unsigned long int __pad1;
     unsigned long int __pad2;
-    unsigned long int __pad3;
     /* FLAGS must stay at this position in the structure to maintain
        binary compatibility.  */
     unsigned int __flags;
@@ -177,7 +177,10 @@ typedef union
     unsigned int __nr_writers_queued;
     /* FLAGS must stay at this position in the structure to maintain
        binary compatibility.  */
-    unsigned int __flags;
+    unsigned char __flags;
+    unsigned char __shared;
+    unsigned char __pad1;
+    unsigned char __pad2;
     int __writer;
   } __data;
 # endif
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S
index 3a6b9f0bad..4ac9ae62ea 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -56,7 +56,6 @@ __pthread_rwlock_unlock:
 
 5:	movl	$0, WRITER(%rdi)
 
-	movl	$1, %esi
 	leaq	WRITERS_WAKEUP(%rdi), %r10
 	movq	%rsi, %rdx
 	cmpl	$0, WRITERS_QUEUED(%rdi)
@@ -78,7 +77,16 @@ __pthread_rwlock_unlock:
 #endif
 	jne	7f
 
-8:	movl	$SYS_futex, %eax
+8:
+#if __ASSUME_PRIVATE_FUTEX
+	movl	$FUTEX_PRIVATE_FLAG|FUTEX_WAKE, %esi
+	xorl	PSHARED(%rdi), %esi
+#else
+	movl	$FUTEX_WAKE, %esi
+	orl	PSHARED(%rdi), %esi
+	xorl	%fs:PRIVATE_FUTEX, %esi
+#endif
+	movl	$SYS_futex, %eax
 	movq	%r10, %rdi
 	syscall