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sysmon(9): Document lock order.

This commit is contained in:
riastradh 2021-12-31 14:44:50 +00:00
parent 42de2e1bed
commit 540dd5ef82
1 changed files with 3 additions and 1 deletions
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4
sys/dev/sysmon/sysmonvar.h
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@ -1,4 +1,4 @@
/* $NetBSD: sysmonvar.h,v 1.52 2021/12/31 14:30:04 riastradh Exp $ */
/* $NetBSD: sysmonvar.h,v 1.53 2021/12/31 14:44:50 riastradh Exp $ */
/*-
* Copyright (c) 2000 Zembu Labs, Inc.
@ -217,6 +217,8 @@ struct sysmon_envsys {
/*
* Locking/synchronization.
*
* Lock order: sme_global_mtx -> sme_mtx -> sme_work_mtx
*/
int sme_busy; /* number of items on workqueue,
* sme_work_mtx to read or write */