11909 THREAD_KPRI_RELEASE does nothing of the sort
Reviewed by: Bryan Cantrill <bryan@joyent.com>
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

@@ -701,11 +701,10 @@
                         return (NULL);
                 ASSERT(p == pcp->prc_proc);
                 mutex_enter(&p->p_lock);
         }
         p->p_proc_flag |= P_PR_LOCK;
-        THREAD_KPRI_REQUEST();
         return (p);
 }
 
 /*
  * Lock the target process by setting P_PR_LOCK and grabbing p->p_lock.

@@ -808,11 +807,10 @@
         ASSERT(p->p_proc_flag & P_PR_LOCK);
         ASSERT(MUTEX_HELD(&p->p_lock));
 
         cv_signal(&pr_pid_cv[p->p_slot]);
         p->p_proc_flag &= ~P_PR_LOCK;
-        THREAD_KPRI_RELEASE();
 }
 
 void
 prunlock(prnode_t *pnp)
 {