svn commit: r198637 - in stable/8/sys: . amd64/include/xen
cddl/contrib/opensolaris contrib/dev/acpica contrib/pf
dev/usb dev/xen/xenpci
Andrew Thompson
thompsa at FreeBSD.org
Thu Oct 29 23:13:03 UTC 2009
Author: thompsa
Date: Thu Oct 29 23:13:02 2009
New Revision: 198637
URL: http://svn.freebsd.org/changeset/base/198637
Log:
MFC r196496
Add a reminder comment to optimize bus_dmamap_sync calls.
Modified:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
stable/8/sys/dev/usb/usb_busdma.c
stable/8/sys/dev/xen/xenpci/ (props changed)
Modified: stable/8/sys/dev/usb/usb_busdma.c
==============================================================================
--- stable/8/sys/dev/usb/usb_busdma.c Thu Oct 29 23:12:29 2009 (r198636)
+++ stable/8/sys/dev/usb/usb_busdma.c Thu Oct 29 23:13:02 2009 (r198637)
@@ -679,6 +679,12 @@ usb_pc_cpu_invalidate(struct usb_page_ca
/* nothing has been loaded into this page cache! */
return;
}
+
+ /*
+ * TODO: We currently do XXX_POSTREAD and XXX_PREREAD at the
+ * same time, but in the future we should try to isolate the
+ * different cases to optimise the code. --HPS
+ */
bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_POSTREAD);
bus_dmamap_sync(pc->tag, pc->map, BUS_DMASYNC_PREREAD);
}
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