Author: kib
Date: Mon May 17 08:35:14 2010
New Revision: 208187
URL: http://svn.freebsd.org/changeset/base/208187
Log:
MFC r207848:
The thread_unsuspend() requires both process mutex and process spinlock
locked. Postpone the process unlock till the thread_unsuspend() is called.
Modified:
stable/7/sys/fs/procfs/procfs_ctl.c
Directory Properties:
stable/7/sys/ (props changed)
stable/7/sys/cddl/contrib/opensolaris/ (props changed)
stable/7/sys/contrib/dev/acpica/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
Modified: stable/7/sys/fs/procfs/procfs_ctl.c
==============================================================================
--- stable/7/sys/fs/procfs/procfs_ctl.c Mon May 17 08:15:04 2010
(r208186)
+++ stable/7/sys/fs/procfs/procfs_ctl.c Mon May 17 08:35:14 2010
(r208187)
@@ -233,7 +233,6 @@ out:
PROC_LOCK(p);
p->p_oppid = 0;
p->p_flag &= ~P_WAITED; /* XXX ? */
- PROC_UNLOCK(p);
sx_xunlock(&proctree_lock);
wakeup(td->td_proc); /* XXX for CTL_WAIT below ? */
@@ -246,9 +245,10 @@ out:
*/
case PROCFS_CTL_STEP:
error = proc_sstep(FIRST_THREAD_IN_PROC(p)); /* XXXKSE */
- PROC_UNLOCK(p);
- if (error)
+ if (error) {
+ PROC_UNLOCK(p);
return (error);
+ }
break;
/*
@@ -257,7 +257,6 @@ out:
*/
case PROCFS_CTL_RUN:
p->p_flag &= ~P_STOPPED_SIG; /* this uses SIGSTOP */
- PROC_UNLOCK(p);
break;
/*
@@ -289,6 +288,7 @@ out:
PROC_SLOCK(p);
thread_unsuspend(p); /* If it can run, let it do so. */
PROC_SUNLOCK(p);
+ PROC_UNLOCK(p);
return (0);
}
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