(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 32 insertions, 23 deletions

diff --git a/nptl/pthread_key_create.c b/nptl/pthread_key_create.c
index 5fc8846243..cf35bc8776 100644
--- a/nptl/pthread_key_create.c
+++ b/nptl/pthread_key_create.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -19,36 +19,45 @@
 
 #include <errno.h>
 #include "pthreadP.h"
-#include <atomic.h>
 
 
+/* Internal mutex for __pthread_keys table handling.  */
+lll_lock_t __pthread_keys_lock = LLL_LOCK_INITIALIZER;
+
 int
 __pthread_key_create (key, destr)
      pthread_key_t *key;
      void (*destr) (void *);
 {
+  int result = EAGAIN;
+  size_t cnt;
+
+  lll_lock (__pthread_keys_lock);
+
   /* Find a slot in __pthread_kyes which is unused.  */
-  for (size_t cnt = 0; cnt < PTHREAD_KEYS_MAX; ++cnt)
-    {
-      uintptr_t seq = __pthread_keys[cnt].seq;
-
-      if (KEY_UNUSED (seq) && KEY_USABLE (seq)
-	  /* We found an unused slot.  Try to allocate it.  */
-	  && ! atomic_compare_and_exchange_bool_acq (&__pthread_keys[cnt].seq,
-						     seq + 1, seq))
-	{
-	  /* Remember the destructor.  */
-	  __pthread_keys[cnt].destr = destr;
-
-	  /* Return the key to the caller.  */
-	  *key = cnt;
-
-	  /* The call succeeded.  */
-	  return 0;
-	}
-    }
-
-  return EAGAIN;
+  for (cnt = 0; cnt < PTHREAD_KEYS_MAX; ++cnt)
+    if (KEY_UNUSED (__pthread_keys[cnt].seq)
+	&& KEY_USABLE (__pthread_keys[cnt].seq))
+      {
+	/* We found an unused slot.  */
+	++__pthread_keys[cnt].seq;
+
+	/* Remember the destructor.  */
+	__pthread_keys[cnt].destr = destr;
+
+	/* Return the key to the caller.  */
+	*key = cnt;
+
+	/* The call succeeded.  */
+	result = 0;
+
+	/* We found a key and can stop now.  */
+	break;
+      }
+
+  lll_unlock (__pthread_keys_lock);
+
+  return result;
 }
 strong_alias (__pthread_key_create, pthread_key_create)
 strong_alias (__pthread_key_create, __pthread_key_create_internal)