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From: Roman Divacky <rdivacky@FreeBSD.org>
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Subject: PERFORCE change 103162 for review
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http://perforce.freebsd.org/chv.cgi?CH=103162

Change 103162 by rdivacky@rdivacky_witten on 2006/08/04 12:38:26

	Switch to using atomic_add_int() for refcounting.

Affected files ...

.. //depot/projects/soc2006/rdivacky_linuxolator/compat/linux/linux_futex.c#13 edit

Differences ...

==== //depot/projects/soc2006/rdivacky_linuxolator/compat/linux/linux_futex.c#13 (text+ko) ====

@@ -274,7 +274,7 @@
 	FUTEX_LOCK;
 	LIST_FOREACH(f, &futex_list, f_list) {
 		if (f->f_uaddr == uaddr) {
-			f->f_refcount++;
+			atomic_add_int(&f->f_refcount, 1);
 			FUTEX_UNLOCK;
 			return f;
 		}
@@ -284,7 +284,7 @@
 	/* Not found, create it */
 	f = malloc(sizeof(*f), M_LINUX, M_WAITOK);
 	f->f_uaddr = uaddr;
-	f->f_refcount = 1;
+	atomic_set_int(&f->f_refcount, 1);
 	TAILQ_INIT(&f->f_waiting_proc);
 	FUTEX_LOCK;
 	LIST_INSERT_HEAD(&futex_list, f, f_list);
@@ -297,7 +297,7 @@
 futex_put(f)
 	struct futex *f;
 {
-	f->f_refcount--;
+	atomic_add_int(&f->f_refcount, -1);
 	if (f->f_refcount == 0) {
 		FUTEX_LOCK;
 		LIST_REMOVE(f, f_list);