staging/lustre/libcfs: remove cfs_pause

Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/include/linux/libcfs/libcfs_prim.h

@@ -40,11 +40,6 @@
 #ifndef __LIBCFS_PRIM_H__
 #define __LIBCFS_PRIM_H__
 
-/*
- * Schedule
- */
-void cfs_pause(cfs_duration_t ticks);
-
 /*
  * Timer
  */

drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c

@@ -2774,7 +2774,8 @@ kiblnd_base_shutdown(void)
 			CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
 			       "Waiting for %d threads to terminate\n",
 			       atomic_read(&kiblnd_data.kib_nthreads));
-			cfs_pause(cfs_time_seconds(1));
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(cfs_time_seconds(1));
 		}
 
 		/* fall through */
@@ -2835,7 +2836,8 @@ kiblnd_shutdown (lnet_ni_t *ni)
 			       "%s: waiting for %d peers to disconnect\n",
 			       libcfs_nid2str(ni->ni_nid),
 			       atomic_read(&net->ibn_npeers));
-			cfs_pause(cfs_time_seconds(1));
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(cfs_time_seconds(1));
 		}
 
 		kiblnd_net_fini_pools(net);

drivers/staging/lustre/lnet/klnds/socklnd/socklnd.c

@@ -2336,7 +2336,8 @@ ksocknal_base_shutdown(void)
 			       "waiting for %d threads to terminate\n",
 				ksocknal_data.ksnd_nthreads);
 			read_unlock(&ksocknal_data.ksnd_global_lock);
-			cfs_pause(cfs_time_seconds(1));
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(cfs_time_seconds(1));
 			read_lock(&ksocknal_data.ksnd_global_lock);
 		}
 		read_unlock(&ksocknal_data.ksnd_global_lock);
@@ -2584,7 +2585,8 @@ ksocknal_shutdown (lnet_ni_t *ni)
 		CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET, /* power of 2? */
 		       "waiting for %d peers to disconnect\n",
 		       net->ksnn_npeers);
-		cfs_pause(cfs_time_seconds(1));
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(cfs_time_seconds(1));
 
 		ksocknal_debug_peerhash(ni);
 

drivers/staging/lustre/lnet/klnds/socklnd/socklnd_cb.c

@@ -189,7 +189,8 @@ ksocknal_transmit (ksock_conn_t *conn, ksock_tx_t *tx)
 	int      bufnob;
 
 	if (ksocknal_data.ksnd_stall_tx != 0) {
-		cfs_pause(cfs_time_seconds(ksocknal_data.ksnd_stall_tx));
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(cfs_time_seconds(ksocknal_data.ksnd_stall_tx));
 	}
 
 	LASSERT (tx->tx_resid != 0);
@@ -345,7 +346,8 @@ ksocknal_receive (ksock_conn_t *conn)
 	int     rc;
 
 	if (ksocknal_data.ksnd_stall_rx != 0) {
-		cfs_pause(cfs_time_seconds (ksocknal_data.ksnd_stall_rx));
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(cfs_time_seconds(ksocknal_data.ksnd_stall_rx));
 	}
 
 	rc = ksocknal_connsock_addref(conn);

drivers/staging/lustre/lnet/lnet/acceptor.c

@@ -371,7 +371,8 @@ lnet_acceptor(void *arg)
 		if (rc != 0) {
 			if (rc != -EAGAIN) {
 				CWARN("Accept error %d: pausing...\n", rc);
-				cfs_pause(cfs_time_seconds(1));
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				schedule_timeout(cfs_time_seconds(1));
 			}
 			continue;
 		}

drivers/staging/lustre/lnet/lnet/api-ni.c

@@ -994,7 +994,8 @@ lnet_shutdown_lndnis (void)
 				       "Waiting for zombie LNI %s\n",
 				       libcfs_nid2str(ni->ni_nid));
 			}
-			cfs_pause(cfs_time_seconds(1));
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(cfs_time_seconds(1));
 			lnet_net_lock(LNET_LOCK_EX);
 			continue;
 		}

drivers/staging/lustre/lnet/lnet/peer.c

@@ -145,7 +145,8 @@ lnet_peer_tables_cleanup(void)
 				       "Waiting for %d peers on peer table\n",
 				       ptable->pt_number);
 			}
-			cfs_pause(cfs_time_seconds(1) / 2);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(cfs_time_seconds(1) / 2);
 			lnet_net_lock(i);
 		}
 		list_splice_init(&ptable->pt_deathrow, &deathrow);

drivers/staging/lustre/lnet/lnet/router.c

@@ -779,7 +779,8 @@ lnet_wait_known_routerstate(void)
 		if (all_known)
 			return;
 
-		cfs_pause(cfs_time_seconds(1));
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(cfs_time_seconds(1));
 	}
 }
 
@@ -1147,7 +1148,8 @@ lnet_prune_rc_data(int wait_unlink)
 		i++;
 		CDEBUG(((i & (-i)) == i) ? D_WARNING : D_NET,
 		       "Waiting for rc buffers to unlink\n");
-		cfs_pause(cfs_time_seconds(1) / 4);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(cfs_time_seconds(1) / 4);
 
 		lnet_net_lock(LNET_LOCK_EX);
 	}
@@ -1206,7 +1208,7 @@ lnet_router_checker(void *arg)
 
 		lnet_prune_rc_data(0); /* don't wait for UNLINK */
 
-		/* Call cfs_pause() here always adds 1 to load average
+		/* Call schedule_timeout() here always adds 1 to load average
 		 * because kernel counts # active tasks as nr_running
 		 * + nr_uninterruptible. */
 		set_current_state(TASK_INTERRUPTIBLE);

drivers/staging/lustre/lnet/selftest/conrpc.c

@@ -1346,7 +1346,8 @@ lstcon_rpc_cleanup_wait(void)
 		mutex_unlock(&console_session.ses_mutex);
 
 		CWARN("Session is shutting down, waiting for termination of transactions\n");
-		cfs_pause(cfs_time_seconds(1));
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(cfs_time_seconds(1));
 
 		mutex_lock(&console_session.ses_mutex);
 	}

drivers/staging/lustre/lnet/selftest/rpc.c

@@ -1585,7 +1585,8 @@ srpc_startup (void)
 	spin_lock_init(&srpc_data.rpc_glock);
 
 	/* 1 second pause to avoid timestamp reuse */
-	cfs_pause(cfs_time_seconds(1));
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(cfs_time_seconds(1));
 	srpc_data.rpc_matchbits = ((__u64) cfs_time_current_sec()) << 48;
 
 	srpc_data.rpc_state = SRPC_STATE_NONE;

drivers/staging/lustre/lnet/selftest/selftest.h

@@ -572,7 +572,11 @@ swi_state2str (int state)
 #undef STATE2STR
 }
 
-#define selftest_wait_events()	cfs_pause(cfs_time_seconds(1) / 10)
+#define selftest_wait_events()					\
+	do {							\
+		set_current_state(TASK_UNINTERRUPTIBLE);	\
+		schedule_timeout(cfs_time_seconds(1) / 10);	\
+	} while (0)
 
 
 #define lst_wait_until(cond, lock, fmt, ...)				\

drivers/staging/lustre/lustre/include/linux/obd.h

@@ -96,7 +96,8 @@ static inline void __client_obd_list_lock(client_obd_lock_t *lock,
 			LCONSOLE_WARN("====== for current process =====\n");
 			dump_stack();
 			LCONSOLE_WARN("====== end =======\n");
-			cfs_pause(1000 * HZ);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(1000 * HZ);
 		}
 		cpu_relax();
 	}

drivers/staging/lustre/lustre/libcfs/linux/linux-prim.c

@@ -70,15 +70,6 @@ add_wait_queue_exclusive_head(wait_queue_head_t *waitq, wait_queue_t *link)
 }
 EXPORT_SYMBOL(add_wait_queue_exclusive_head);
 
-/* deschedule for a bit... */
-void
-cfs_pause(cfs_duration_t ticks)
-{
-	set_current_state(TASK_UNINTERRUPTIBLE);
-	schedule_timeout(ticks);
-}
-EXPORT_SYMBOL(cfs_pause);
-
 void cfs_init_timer(struct timer_list *t)
 {
 	init_timer(t);

drivers/staging/lustre/lustre/libcfs/workitem.c

@@ -334,7 +334,8 @@ cfs_wi_sched_destroy(struct cfs_wi_sched *sched)
 		       sched->ws_nthreads, sched->ws_name);
 
 		spin_unlock(&cfs_wi_data.wi_glock);
-		cfs_pause(cfs_time_seconds(1) / 20);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(cfs_time_seconds(1) / 20);
 		spin_lock(&cfs_wi_data.wi_glock);
 	}
 
@@ -459,7 +460,8 @@ cfs_wi_shutdown (void)
 
 		while (sched->ws_nthreads != 0) {
 			spin_unlock(&cfs_wi_data.wi_glock);
-			cfs_pause(cfs_time_seconds(1) / 20);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(cfs_time_seconds(1) / 20);
 			spin_lock(&cfs_wi_data.wi_glock);
 		}
 		spin_unlock(&cfs_wi_data.wi_glock);