Module Name: src
Committed By: reinoud
Date: Mon Sep 5 12:22:19 UTC 2011
Modified Files:
src/sys/arch/usermode/dev: cpu.c
Log Message:
Disable kernel preemption in the critical section of cpu_switchto()
To generate a diff of this commit:
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/usermode/dev/cpu.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/arch/usermode/dev/cpu.c
diff -u src/sys/arch/usermode/dev/cpu.c:1.29 src/sys/arch/usermode/dev/cpu.c:1.30
--- src/sys/arch/usermode/dev/cpu.c:1.29 Sun Sep 4 21:01:39 2011
+++ src/sys/arch/usermode/dev/cpu.c Mon Sep 5 12:22:19 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.c,v 1.29 2011/09/04 21:01:39 reinoud Exp $ */
+/* $NetBSD: cpu.c,v 1.30 2011/09/05 12:22:19 reinoud Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <[email protected]>
@@ -29,7 +29,7 @@
#include "opt_cpu.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.29 2011/09/04 21:01:39 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.30 2011/09/05 12:22:19 reinoud Exp $");
#include <sys/param.h>
#include <sys/conf.h>
@@ -184,6 +184,8 @@
}
#endif /* !CPU_DEBUG */
+ kpreempt_disable();
+
ci->ci_stash = oldlwp;
curlwp = newlwp;
@@ -197,6 +199,8 @@
}
thunk_seterrno(newpcb->pcb_errno);
+ kpreempt_enable();
+
#ifdef CPU_DEBUG
printf("cpu_switchto: returning %p (was %p)\n", ci->ci_stash, oldlwp);
#endif
