Module Name: src
Committed By: pooka
Date: Sun Mar 29 18:21:06 UTC 2009
Modified Files:
src/sys/kern: subr_evcnt.c
Log Message:
protect allevents list with a mutex
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/sys/kern/subr_evcnt.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/kern/subr_evcnt.c
diff -u src/sys/kern/subr_evcnt.c:1.5 src/sys/kern/subr_evcnt.c:1.6
--- src/sys/kern/subr_evcnt.c:1.5 Sat Mar 21 13:06:39 2009
+++ src/sys/kern/subr_evcnt.c Sun Mar 29 18:21:06 2009
@@ -1,4 +1,4 @@
-/* $NetBSD: subr_evcnt.c,v 1.5 2009/03/21 13:06:39 ad Exp $ */
+/* $NetBSD: subr_evcnt.c,v 1.6 2009/03/29 18:21:06 pooka Exp $ */
/*
* Copyright (c) 1996, 2000 Christopher G. Demetriou
@@ -77,14 +77,16 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_evcnt.c,v 1.5 2009/03/21 13:06:39 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_evcnt.c,v 1.6 2009/03/29 18:21:06 pooka Exp $");
#include <sys/param.h>
#include <sys/device.h>
+#include <sys/mutex.h>
#include <sys/systm.h>
/* list of all events */
struct evcntlist allevents = TAILQ_HEAD_INITIALIZER(allevents);
+static kmutex_t evmtx;
/*
* We need a dummy object to stuff into the evcnt link set to
@@ -103,6 +105,8 @@
__link_set_decl(evcnts, struct evcnt);
struct evcnt * const *evp;
+ mutex_init(&evmtx, MUTEX_DEFAULT, IPL_NONE);
+
__link_set_foreach(evp, evcnts) {
if (*evp == &dummy_static_evcnt)
continue;
@@ -133,7 +137,9 @@
#endif
ev->ev_namelen = len;
+ mutex_enter(&evmtx);
TAILQ_INSERT_TAIL(&allevents, ev, ev_list);
+ mutex_exit(&evmtx);
}
/*
@@ -160,5 +166,7 @@
evcnt_detach(struct evcnt *ev)
{
+ mutex_enter(&evmtx);
TAILQ_REMOVE(&allevents, ev, ev_list);
+ mutex_exit(&evmtx);
}
