Module Name: src
Committed By: riastradh
Date: Sat Feb 25 00:33:15 UTC 2023
Modified Files:
src/sys/arch/xen/xen: xbdback_xenbus.c
Log Message:
xbdback(4): Membar audit.
After consuming request slots, must issue xen_wmb notifying the other
side that we've consumed them in RING_FINAL_CHECK_FOR_REQUESTS.
To generate a diff of this commit:
cvs rdiff -u -r1.101 -r1.102 src/sys/arch/xen/xen/xbdback_xenbus.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/xen/xen/xbdback_xenbus.c
diff -u src/sys/arch/xen/xen/xbdback_xenbus.c:1.101 src/sys/arch/xen/xen/xbdback_xenbus.c:1.102
--- src/sys/arch/xen/xen/xbdback_xenbus.c:1.101 Thu Sep 1 15:33:23 2022
+++ src/sys/arch/xen/xen/xbdback_xenbus.c Sat Feb 25 00:33:15 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: xbdback_xenbus.c,v 1.101 2022/09/01 15:33:23 bouyer Exp $ */
+/* $NetBSD: xbdback_xenbus.c,v 1.102 2023/02/25 00:33:15 riastradh Exp $ */
/*
* Copyright (c) 2006 Manuel Bouyer.
@@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xbdback_xenbus.c,v 1.101 2022/09/01 15:33:23 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xbdback_xenbus.c,v 1.102 2023/02/25 00:33:15 riastradh Exp $");
#include <sys/buf.h>
#include <sys/condvar.h>
@@ -1065,6 +1065,7 @@ xbdback_co_main_done2(struct xbdback_ins
{
int work_to_do;
+ xen_wmb();
RING_FINAL_CHECK_FOR_REQUESTS(&xbdi->xbdi_ring.ring_n, work_to_do);
if (work_to_do)
xbdi->xbdi_cont = xbdback_co_main;
