From: Ben Gras <ben@minix3.org>
Date: Tue, 20 Jul 2010 17:13:44 +0000 (+0000)
Subject: kernel: clear MF_CONTEXT_SET on kernel exit.
X-Git-Tag: v3.1.8~179
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/Bv9ARM.html?a=commitdiff_plain;h=7f343ed5747a3877e08beedf2131ad4b35f5a031;p=minix.git

kernel: clear MF_CONTEXT_SET on kernel exit.
---

diff --git a/kernel/proc.c b/kernel/proc.c
index f5f71a4fa..5db99af13 100644
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -237,6 +237,12 @@ check_misc_flags:
 		enable_fpu_exception();
 	else
 		disable_fpu_exception();
+
+	/* If MF_CONTEXT_SET is set, don't clobber process state within
+	 * the kernel. The next kernel entry is OK again though.
+	 */
+	proc_ptr->p_misc_flags &= ~MF_CONTEXT_SET;
+
 	/*
 	 * restore_user_context() carries out the actual mode switch from kernel
 	 * to userspace. This function does not return