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The thread_unsuspend() requires both process mutex and process spinlock

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locked. Postpone the process unlock till the thread_unsuspend() is called.

Approved by:	des (procfs maintainer)
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2010-05-10 15:19:12 +00:00
parent 53731b3c44
commit c3fd23a2dc
1 changed files with 4 additions and 4 deletions
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8
sys/fs/procfs/procfs_ctl.c
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@ -236,7 +236,6 @@ procfs_control(struct thread *td, struct proc *p, int op)
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 ? */
@ -249,9 +248,10 @@ procfs_control(struct thread *td, struct proc *p, int op)
*/
case PROCFS_CTL_STEP:
error = proc_sstep(FIRST_THREAD_IN_PROC(p));
PROC_UNLOCK(p);
if (error)
if (error) {
PROC_UNLOCK(p);
return (error);
}
break;
/*
@ -260,7 +260,6 @@ procfs_control(struct thread *td, struct proc *p, int op)
*/
case PROCFS_CTL_RUN:
p->p_flag &= ~P_STOPPED_SIG; /* this uses SIGSTOP */
PROC_UNLOCK(p);
break;
/*
@ -292,6 +291,7 @@ procfs_control(struct thread *td, struct proc *p, int op)
PROC_SLOCK(p);
thread_unsuspend(p); /* If it can run, let it do so. */
PROC_SUNLOCK(p);
PROC_UNLOCK(p);
return (0);
}