From: Mike Christie <[EMAIL PROTECTED]>
This just documents how to hol the ex_lock and em_lock at
the same time so it is clear to reviewers and developers.
This also adds copyrights to fc_exch.c for past patches.
Signed-off-by: Mike Christie <[EMAIL PROTECTED]>
---
drivers/scsi/libfc/fc_exch.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 60a12e7..90c5fcf 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -1,5 +1,7 @@
/*
* Copyright(c) 2007 Intel Corporation. All rights reserved.
+ * Copyright(c) 2008 Red Hat, Inc. All rights reserved.
+ * Copyright(c) 2008 Mike Christie
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -73,6 +75,9 @@ struct fc_exch;
* esb_stat, f_ctl, seq.ssb_stat, seq.f_ctl.
* seq_id
* sequence allocation
+ *
+ * If the em_lock and ex_lock must be taken at the same time, the
+ * em_lock must be taken before the ex_lock.
*/
struct fc_exch {
struct fc_exch_mgr *em; /* exchange manager */
--
1.5.5.1
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