Author: imp
Date: Thu Jun 28 07:28:39 2012
New Revision: 237693
URL: http://svn.freebsd.org/changeset/base/237693
Log:
Document some MP assumptions for sio.
Submitted by: bde (years ago)
Modified:
head/sys/dev/sio/sio.c
Modified: head/sys/dev/sio/sio.c
==============================================================================
--- head/sys/dev/sio/sio.c Thu Jun 28 07:26:44 2012 (r237692)
+++ head/sys/dev/sio/sio.c Thu Jun 28 07:28:39 2012 (r237693)
@@ -278,6 +278,11 @@ static int sio_inited;
/* table and macro for fast conversion from a unit number to its com struct */
devclass_t sio_devclass;
+/*
+ * XXX Assmues that devclass_get_device, devclass_get_softc and
+ * device_get_softc are fast interrupt safe. The current implementation
+ * of these functions are.
+ */
#define com_addr(unit) ((struct com_s *) \
devclass_get_softc(sio_devclass, unit)) /* XXX */
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