gc_locks.h (GC_test_and_set <POWERPC>): Don't use broken 64-bit version.

	* include/private/gc_locks.h (GC_test_and_set <POWERPC>): Don't
	use broken 64-bit version.

From-SVN: r110571

boehm-gc/ChangeLog

+2006-02-04  Alan Modra  <amodra@bigpond.net.au>
+
+	* include/private/gc_locks.h (GC_test_and_set <POWERPC>): Don't
+	use broken 64-bit version.
+
 2006-01-25  Andreas Tobler  <a.tobler@schweiz.ch>
 
 	* darwin_stop_world.c: Change inline asm instruction to ld as ldz

boehm-gc/include/private/gc_locks.h

@@ -139,7 +139,7 @@
 #      define GC_TEST_AND_SET_DEFINED
 #    endif
 #    if defined(POWERPC)
-#     if CPP_WORDSZ == 64
+#     if 0 /* CPP_WORDSZ == 64  totally broken to use int locks with ldarx */
         inline static int GC_test_and_set(volatile unsigned int *addr) {
           unsigned long oldval;
           unsigned long temp = 1; /* locked value */