From ab0eee55638f4ed525b6a81b05f44e039d01c548 Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Thu, 17 Apr 2003 22:14:30 +0000
Subject: [PATCH] Protect p_flag with the proc lock.  The sched_lock is not
 needed to turn off P_STOPPED_SIG in p_flag.

---
 sys/fs/procfs/procfs_ctl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/fs/procfs/procfs_ctl.c b/sys/fs/procfs/procfs_ctl.c
index 672704027017..ff4fb0adc1d3 100644
--- a/sys/fs/procfs/procfs_ctl.c
+++ b/sys/fs/procfs/procfs_ctl.c
@@ -263,8 +263,8 @@ out:
 	 * or some other trap.
 	 */
 	case PROCFS_CTL_RUN:
-		PROC_UNLOCK(p);
 		p->p_flag &= ~P_STOPPED_SIG;	/* this uses SIGSTOP */
+		PROC_UNLOCK(p);
 		break;
 
 	/*
@@ -349,9 +349,9 @@ procfs_doprocctl(PFS_FILL_ARGS)
 				/* XXXKSE: */
 				FIX_SSTEP(FIRST_THREAD_IN_PROC(p));
 #endif
-				mtx_lock_spin(&sched_lock);
 				/* XXXKSE: */
 				p->p_flag &= ~P_STOPPED_SIG;
+				mtx_lock_spin(&sched_lock);
 				thread_unsuspend(p);
 				mtx_unlock_spin(&sched_lock);
 			} else