Fix another recently-changed place that was messing with spinlock-

protected data structures and not using a volatile pointer for same.

diff --git a/src/backend/storage/lmgr/lwlock.c b/src/backend/storage/lmgr/lwlock.c
index 8b7565a6aa7299957a14ab5cdb685b270758768d..ce0606a3c4e0f890e0496f7c32b9f8e4ccdbe3fe 100644 (file)
--- a/src/backend/storage/lmgr/lwlock.c
+++ b/src/backend/storage/lmgr/lwlock.c
@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.32 2005/10/07 21:42:38 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.33 2005/10/12 16:55:59 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -226,7 +226,8 @@ LWLockId
 LWLockAssign(void)
 {
    LWLockId    result;
-   int        *LWLockCounter;
+   /* use volatile pointer to prevent code rearrangement */
+   volatile int *LWLockCounter;
 
    LWLockCounter = (int *) ((char *) LWLockArray - 2 * sizeof(int));
    SpinLockAcquire(ShmemLock);