0008-Replace-all-schedule-timeout-1-with-schedule_min_hrt.patch

From 8a679ba5279cbff1a8e4c47b55ac4bd6d66289f8 Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Mon, 20 Feb 2017 13:28:30 +1100
Subject: [PATCH 08/16] Replace all schedule timeout(1) with
 schedule_min_hrtimeout()

---
 drivers/block/swim.c                          |   6 +-
 drivers/bluetooth/hci_qca.c                   |   2 +-
 drivers/char/ipmi/ipmi_msghandler.c           |   2 +-
 drivers/char/ipmi/ipmi_ssif.c                 |   2 +-
 drivers/char/snsc.c                           |   4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c          |   2 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_irq.c           |   2 +-
 drivers/media/pci/ivtv/ivtv-ioctl.c           |   2 +-
 drivers/media/pci/ivtv/ivtv-streams.c         |   2 +-
 drivers/mfd/ucb1x00-core.c                    |   2 +-
 drivers/misc/sgi-xp/xpc_channel.c             |   2 +-
 drivers/net/caif/caif_hsi.c                   |   2 +-
 drivers/net/can/usb/peak_usb/pcan_usb.c       |   2 +-
 drivers/net/usb/lan78xx.c                     |   2 +-
 drivers/net/usb/usbnet.c                      |   2 +-
 drivers/scsi/fnic/fnic_scsi.c                 |   4 +-
 drivers/scsi/snic/snic_scsi.c                 |   2 +-
 .../staging/comedi/drivers/ni_mio_common.c    |   2 +-
 drivers/staging/lustre/lnet/lnet/lib-eq.c     | 426 ++++++++++++++++++
 drivers/staging/rts5208/rtsx.c                |   2 +-
 drivers/staging/speakup/speakup_acntpc.c      |   4 +-
 drivers/staging/speakup/speakup_apollo.c      |   2 +-
 drivers/staging/speakup/speakup_decext.c      |   2 +-
 drivers/staging/speakup/speakup_decpc.c       |   2 +-
 drivers/staging/speakup/speakup_dectlk.c      |   2 +-
 drivers/staging/speakup/speakup_dtlk.c        |   4 +-
 drivers/staging/speakup/speakup_keypc.c       |   4 +-
 drivers/staging/speakup/synth.c               |  14 +-
 .../staging/unisys/visornic/visornic_main.c   |   6 +-
 drivers/video/fbdev/omap/hwa742.c             |   2 +-
 drivers/video/fbdev/pxafb.c                   |   2 +-
 fs/btrfs/extent-tree.c                        |   2 +-
 fs/btrfs/inode-map.c                          |   2 +-
 sound/usb/line6/pcm.c                         |   2 +-
 34 files changed, 471 insertions(+), 51 deletions(-)
 create mode 100644 drivers/staging/lustre/lnet/lnet/lib-eq.c

diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index 0e31884a9519..16fcfbde31d5 100644
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -332,7 +332,7 @@ static inline void swim_motor(struct swim __iomem *base,
 			if (swim_readbit(base, MOTOR_ON))
 				break;
 			current->state = TASK_INTERRUPTIBLE;
-			schedule_timeout(1);
+			schedule_min_hrtimeout();
 		}
 	} else if (action == OFF) {
 		swim_action(base, MOTOR_OFF);
@@ -351,7 +351,7 @@ static inline void swim_eject(struct swim __iomem *base)
 		if (!swim_readbit(base, DISK_IN))
 			break;
 		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 	}
 	swim_select(base, RELAX);
 }
@@ -375,7 +375,7 @@ static inline int swim_step(struct swim __iomem *base)
 	for (wait = 0; wait < HZ; wait++) {
 
 		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 
 		swim_select(base, RELAX);
 		if (!swim_readbit(base, STEP))
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 2fee65886d50..4ca0bae3df58 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -980,7 +980,7 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
 	 * then host can communicate with new baudrate to controller
 	 */
 	set_current_state(TASK_UNINTERRUPTIBLE);
-	schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
+	schedule_msec_hrtimeout((BAUDRATE_SETTLE_TIMEOUT_MS));
 	set_current_state(TASK_RUNNING);
 
 	if (qcadev->btsoc_type == QCA_WCN3990)
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index 7fc9612070a1..5a7f8a879001 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -3453,7 +3453,7 @@ static void cleanup_smi_msgs(struct ipmi_smi *intf)
 	/* Current message first, to preserve order */
 	while (intf->curr_msg && !list_empty(&intf->waiting_rcv_msgs)) {
 		/* Wait for the message to clear out. */
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 	}
 
 	/* No need for locks, the interface is down. */
diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index 29e67a80fb20..73bd0eca5fe5 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -1208,7 +1208,7 @@ static void shutdown_ssif(void *send_info)
 
 	/* make sure the driver is not looking for flags any more. */
 	while (ssif_info->ssif_state != SSIF_NORMAL)
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 
 	ssif_info->stopping = true;
 	del_timer_sync(&ssif_info->retry_timer);
diff --git a/drivers/char/snsc.c b/drivers/char/snsc.c
index 5918ea7499bb..5228e78df804 100644
--- a/drivers/char/snsc.c
+++ b/drivers/char/snsc.c
@@ -198,7 +198,7 @@ scdrv_read(struct file *file, char __user *buf, size_t count, loff_t *f_pos)
 		add_wait_queue(&sd->sd_rq, &wait);
 		spin_unlock_irqrestore(&sd->sd_rlock, flags);
 
-		schedule_timeout(msecs_to_jiffies(SCDRV_TIMEOUT));
+		schedule_msec_hrtimeout((SCDRV_TIMEOUT));
 
 		remove_wait_queue(&sd->sd_rq, &wait);
 		if (signal_pending(current)) {
@@ -294,7 +294,7 @@ scdrv_write(struct file *file, const char __user *buf,
 		add_wait_queue(&sd->sd_wq, &wait);
 		spin_unlock_irqrestore(&sd->sd_wlock, flags);
 
-		schedule_timeout(msecs_to_jiffies(SCDRV_TIMEOUT));
+		schedule_msec_hrtimeout((SCDRV_TIMEOUT));
 
 		remove_wait_queue(&sd->sd_wq, &wait);
 		if (signal_pending(current)) {
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
index d0fd147ef75f..730ae4fe6b85 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
@@ -235,7 +235,7 @@ static int vmw_fifo_wait_noirq(struct vmw_private *dev_priv,
 			DRM_ERROR("SVGA device lockup.\n");
 			break;
 		}
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 		if (interruptible && signal_pending(current)) {
 			ret = -ERESTARTSYS;
 			break;
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c b/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
index c3ad4478266b..7e2a29d56459 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
@@ -202,7 +202,7 @@ int vmw_fallback_wait(struct vmw_private *dev_priv,
 			break;
 		}
 		if (lazy)
-			schedule_timeout(1);
+			schedule_min_hrtimeout();
 		else if ((++count & 0x0F) == 0) {
 			/**
 			 * FIXME: Use schedule_hr_timeout here for
diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.c b/drivers/media/pci/ivtv/ivtv-ioctl.c
index 4cdc6d2be85d..22c0803cbff3 100644
--- a/drivers/media/pci/ivtv/ivtv-ioctl.c
+++ b/drivers/media/pci/ivtv/ivtv-ioctl.c
@@ -1154,7 +1154,7 @@ void ivtv_s_std_dec(struct ivtv *itv, v4l2_std_id std)
 				TASK_UNINTERRUPTIBLE);
 		if ((read_reg(IVTV_REG_DEC_LINE_FIELD) >> 16) < 100)
 			break;
-		schedule_timeout(msecs_to_jiffies(25));
+		schedule_msec_hrtimeout((25));
 	}
 	finish_wait(&itv->vsync_waitq, &wait);
 	mutex_lock(&itv->serialize_lock);
diff --git a/drivers/media/pci/ivtv/ivtv-streams.c b/drivers/media/pci/ivtv/ivtv-streams.c
index d27c6df97566..e9ffc4eeb478 100644
--- a/drivers/media/pci/ivtv/ivtv-streams.c
+++ b/drivers/media/pci/ivtv/ivtv-streams.c
@@ -834,7 +834,7 @@ int ivtv_stop_v4l2_encode_stream(struct ivtv_stream *s, int gop_end)
 			while (!test_bit(IVTV_F_I_EOS, &itv->i_flags) &&
 				time_before(jiffies,
 					    then + msecs_to_jiffies(2000))) {
-				schedule_timeout(msecs_to_jiffies(10));
+				schedule_msec_hrtimeout((10));
 			}
 
 			/* To convert jiffies to ms, we must multiply by 1000
diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c
index d6fb2e1a759a..7ac951b84beb 100644
--- a/drivers/mfd/ucb1x00-core.c
+++ b/drivers/mfd/ucb1x00-core.c
@@ -253,7 +253,7 @@ unsigned int ucb1x00_adc_read(struct ucb1x00 *ucb, int adc_channel, int sync)
 			break;
 		/* yield to other processes */
 		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 	}
 
 	return UCB_ADC_DAT(val);
diff --git a/drivers/misc/sgi-xp/xpc_channel.c b/drivers/misc/sgi-xp/xpc_channel.c
index 05a890ce2ab8..f6eb97bc3a2c 100644
--- a/drivers/misc/sgi-xp/xpc_channel.c
+++ b/drivers/misc/sgi-xp/xpc_channel.c
@@ -834,7 +834,7 @@ xpc_allocate_msg_wait(struct xpc_channel *ch)
 
 	atomic_inc(&ch->n_on_msg_allocate_wq);
 	prepare_to_wait(&ch->msg_allocate_wq, &wait, TASK_INTERRUPTIBLE);
-	ret = schedule_timeout(1);
+	ret = schedule_min_hrtimeout();
 	finish_wait(&ch->msg_allocate_wq, &wait);
 	atomic_dec(&ch->n_on_msg_allocate_wq);
 
diff --git a/drivers/net/caif/caif_hsi.c b/drivers/net/caif/caif_hsi.c
index 433a14b9f731..4d197a99472b 100644
--- a/drivers/net/caif/caif_hsi.c
+++ b/drivers/net/caif/caif_hsi.c
@@ -939,7 +939,7 @@ static void cfhsi_wake_down(struct work_struct *work)
 			break;
 
 		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 		retry--;
 	}
 
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c
index 13238a72a338..fc51ae55c63f 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb.c
@@ -250,7 +250,7 @@ static int pcan_usb_write_mode(struct peak_usb_device *dev, u8 onoff)
 	} else {
 		/* the PCAN-USB needs time to init */
 		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(msecs_to_jiffies(PCAN_USB_STARTUP_TIMEOUT));
+		schedule_msec_hrtimeout((PCAN_USB_STARTUP_TIMEOUT));
 	}
 
 	return err;
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index c3c9ba44e2a1..1bc66289699f 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2681,7 +2681,7 @@ static void lan78xx_terminate_urbs(struct lan78xx_net *dev)
 	while (!skb_queue_empty(&dev->rxq) &&
 	       !skb_queue_empty(&dev->txq) &&
 	       !skb_queue_empty(&dev->done)) {
-		schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS));
+		schedule_msec_hrtimeout((UNLINK_TIMEOUT_MS));
 		set_current_state(TASK_UNINTERRUPTIBLE);
 		netif_dbg(dev, ifdown, dev->net,
 			  "waited for %d urb completions\n", temp);
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 770aa624147f..9384de186bf9 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -770,7 +770,7 @@ static void wait_skb_queue_empty(struct sk_buff_head *q)
 	spin_lock_irqsave(&q->lock, flags);
 	while (!skb_queue_empty(q)) {
 		spin_unlock_irqrestore(&q->lock, flags);
-		schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS));
+		schedule_msec_hrtimeout((UNLINK_TIMEOUT_MS));
 		set_current_state(TASK_UNINTERRUPTIBLE);
 		spin_lock_irqsave(&q->lock, flags);
 	}
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index 8cbd3c9f0b4c..7e3f9baa4ac6 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -217,7 +217,7 @@ int fnic_fw_reset_handler(struct fnic *fnic)
 
 	/* wait for io cmpl */
 	while (atomic_read(&fnic->in_flight))
-		schedule_timeout(msecs_to_jiffies(1));
+		schedule_msec_hrtimeout((1));
 
 	spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
 
@@ -2255,7 +2255,7 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
 		}
 	}
 
-	schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
+	schedule_msec_hrtimeout((2 * fnic->config.ed_tov));
 
 	/* walk again to check, if IOs are still pending in fw */
 	if (fnic_is_abts_pending(fnic, lr_sc))
diff --git a/drivers/scsi/snic/snic_scsi.c b/drivers/scsi/snic/snic_scsi.c
index d9b2e46424aa..4a313a0f2039 100644
--- a/drivers/scsi/snic/snic_scsi.c
+++ b/drivers/scsi/snic/snic_scsi.c
@@ -2354,7 +2354,7 @@ snic_reset(struct Scsi_Host *shost, struct scsi_cmnd *sc)
 
 	/* Wait for all the IOs that are entered in Qcmd */
 	while (atomic_read(&snic->ios_inflight))
-		schedule_timeout(msecs_to_jiffies(1));
+		schedule_msec_hrtimeout((1));
 
 	ret = snic_issue_hba_reset(snic, sc);
 	if (ret) {
diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c
index 4dee2fc37aed..2bb1c1157636 100644
--- a/drivers/staging/comedi/drivers/ni_mio_common.c
+++ b/drivers/staging/comedi/drivers/ni_mio_common.c
@@ -4650,7 +4650,7 @@ static int cs5529_wait_for_idle(struct comedi_device *dev)
 		if ((status & NI67XX_CAL_STATUS_BUSY) == 0)
 			break;
 		set_current_state(TASK_INTERRUPTIBLE);
-		if (schedule_timeout(1))
+		if (schedule_min_hrtimeout())
 			return -EIO;
 	}
 	if (i == timeout) {
diff --git a/drivers/staging/lustre/lnet/lnet/lib-eq.c b/drivers/staging/lustre/lnet/lnet/lib-eq.c
new file mode 100644
index 000000000000..8cca151741b2
--- /dev/null
+++ b/drivers/staging/lustre/lnet/lnet/lib-eq.c
@@ -0,0 +1,426 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lnet/lnet/lib-eq.c
+ *
+ * Library level Event queue management routines
+ */
+
+#define DEBUG_SUBSYSTEM S_LNET
+
+#include <linux/lnet/lib-lnet.h>
+
+/**
+ * Create an event queue that has room for \a count number of events.
+ *
+ * The event queue is circular and older events will be overwritten by new
+ * ones if they are not removed in time by the user using the functions
+ * LNetEQGet(), LNetEQWait(), or LNetEQPoll(). It is up to the user to
+ * determine the appropriate size of the event queue to prevent this loss
+ * of events. Note that when EQ handler is specified in \a callback, no
+ * event loss can happen, since the handler is run for each event deposited
+ * into the EQ.
+ *
+ * \param count The number of events to be stored in the event queue. It
+ * will be rounded up to the next power of two.
+ * \param callback A handler function that runs when an event is deposited
+ * into the EQ. The constant value LNET_EQ_HANDLER_NONE can be used to
+ * indicate that no event handler is desired.
+ * \param handle On successful return, this location will hold a handle for
+ * the newly created EQ.
+ *
+ * \retval 0       On success.
+ * \retval -EINVAL If an parameter is not valid.
+ * \retval -ENOMEM If memory for the EQ can't be allocated.
+ *
+ * \see lnet_eq_handler_t for the discussion on EQ handler semantics.
+ */
+int
+LNetEQAlloc(unsigned int count, lnet_eq_handler_t callback,
+	    struct lnet_handle_eq *handle)
+{
+	struct lnet_eq *eq;
+
+	LASSERT(the_lnet.ln_refcount > 0);
+
+	/*
+	 * We need count to be a power of 2 so that when eq_{enq,deq}_seq
+	 * overflow, they don't skip entries, so the queue has the same
+	 * apparent capacity at all times
+	 */
+	if (count)
+		count = roundup_pow_of_two(count);
+
+	if (callback != LNET_EQ_HANDLER_NONE && count)
+		CWARN("EQ callback is guaranteed to get every event, do you still want to set eqcount %d for polling event which will have locking overhead? Please contact with developer to confirm\n", count);
+
+	/*
+	 * count can be 0 if only need callback, we can eliminate
+	 * overhead of enqueue event
+	 */
+	if (!count && callback == LNET_EQ_HANDLER_NONE)
+		return -EINVAL;
+
+	eq = kzalloc(sizeof(*eq), GFP_NOFS);
+	if (!eq)
+		return -ENOMEM;
+
+	if (count) {
+		eq->eq_events = kvmalloc_array(count, sizeof(struct lnet_event),
+					       GFP_KERNEL | __GFP_ZERO);
+		if (!eq->eq_events)
+			goto failed;
+		/*
+		 * NB allocator has set all event sequence numbers to 0,
+		 * so all them should be earlier than eq_deq_seq
+		 */
+	}
+
+	eq->eq_deq_seq = 1;
+	eq->eq_enq_seq = 1;
+	eq->eq_size = count;
+	eq->eq_callback = callback;
+
+	eq->eq_refs = cfs_percpt_alloc(lnet_cpt_table(),
+				       sizeof(*eq->eq_refs[0]));
+	if (!eq->eq_refs)
+		goto failed;
+
+	/* MUST hold both exclusive lnet_res_lock */
+	lnet_res_lock(LNET_LOCK_EX);
+	/*
+	 * NB: hold lnet_eq_wait_lock for EQ link/unlink, so we can do
+	 * both EQ lookup and poll event with only lnet_eq_wait_lock
+	 */
+	lnet_eq_wait_lock();
+
+	lnet_res_lh_initialize(&the_lnet.ln_eq_container, &eq->eq_lh);
+	list_add(&eq->eq_list, &the_lnet.ln_eq_container.rec_active);
+
+	lnet_eq_wait_unlock();
+	lnet_res_unlock(LNET_LOCK_EX);
+
+	lnet_eq2handle(handle, eq);
+	return 0;
+
+failed:
+	kvfree(eq->eq_events);
+
+	if (eq->eq_refs)
+		cfs_percpt_free(eq->eq_refs);
+
+	kfree(eq);
+	return -ENOMEM;
+}
+EXPORT_SYMBOL(LNetEQAlloc);
+
+/**
+ * Release the resources associated with an event queue if it's idle;
+ * otherwise do nothing and it's up to the user to try again.
+ *
+ * \param eqh A handle for the event queue to be released.
+ *
+ * \retval 0 If the EQ is not in use and freed.
+ * \retval -ENOENT If \a eqh does not point to a valid EQ.
+ * \retval -EBUSY  If the EQ is still in use by some MDs.
+ */
+int
+LNetEQFree(struct lnet_handle_eq eqh)
+{
+	struct lnet_eq *eq;
+	struct lnet_event *events = NULL;
+	int **refs = NULL;
+	int *ref;
+	int rc = 0;
+	int size = 0;
+	int i;
+
+	LASSERT(the_lnet.ln_refcount > 0);
+
+	lnet_res_lock(LNET_LOCK_EX);
+	/*
+	 * NB: hold lnet_eq_wait_lock for EQ link/unlink, so we can do
+	 * both EQ lookup and poll event with only lnet_eq_wait_lock
+	 */
+	lnet_eq_wait_lock();
+
+	eq = lnet_handle2eq(&eqh);
+	if (!eq) {
+		rc = -ENOENT;
+		goto out;
+	}
+
+	cfs_percpt_for_each(ref, i, eq->eq_refs) {
+		LASSERT(*ref >= 0);
+		if (!*ref)
+			continue;
+
+		CDEBUG(D_NET, "Event equeue (%d: %d) busy on destroy.\n",
+		       i, *ref);
+		rc = -EBUSY;
+		goto out;
+	}
+
+	/* stash for free after lock dropped */
+	events = eq->eq_events;
+	size = eq->eq_size;
+	refs = eq->eq_refs;
+
+	lnet_res_lh_invalidate(&eq->eq_lh);
+	list_del(&eq->eq_list);
+	kfree(eq);
+ out:
+	lnet_eq_wait_unlock();
+	lnet_res_unlock(LNET_LOCK_EX);
+
+	kvfree(events);
+	if (refs)
+		cfs_percpt_free(refs);
+
+	return rc;
+}
+EXPORT_SYMBOL(LNetEQFree);
+
+void
+lnet_eq_enqueue_event(struct lnet_eq *eq, struct lnet_event *ev)
+{
+	/* MUST called with resource lock hold but w/o lnet_eq_wait_lock */
+	int index;
+
+	if (!eq->eq_size) {
+		LASSERT(eq->eq_callback != LNET_EQ_HANDLER_NONE);
+		eq->eq_callback(ev);
+		return;
+	}
+
+	lnet_eq_wait_lock();
+	ev->sequence = eq->eq_enq_seq++;
+
+	LASSERT(eq->eq_size == LOWEST_BIT_SET(eq->eq_size));
+	index = ev->sequence & (eq->eq_size - 1);
+
+	eq->eq_events[index] = *ev;
+
+	if (eq->eq_callback != LNET_EQ_HANDLER_NONE)
+		eq->eq_callback(ev);
+
+	/* Wake anyone waiting in LNetEQPoll() */
+	if (waitqueue_active(&the_lnet.ln_eq_waitq))
+		wake_up_all(&the_lnet.ln_eq_waitq);
+	lnet_eq_wait_unlock();
+}
+
+static int
+lnet_eq_dequeue_event(struct lnet_eq *eq, struct lnet_event *ev)
+{
+	int new_index = eq->eq_deq_seq & (eq->eq_size - 1);
+	struct lnet_event *new_event = &eq->eq_events[new_index];
+	int rc;
+
+	/* must called with lnet_eq_wait_lock hold */
+	if (LNET_SEQ_GT(eq->eq_deq_seq, new_event->sequence))
+		return 0;
+
+	/* We've got a new event... */
+	*ev = *new_event;
+
+	CDEBUG(D_INFO, "event: %p, sequence: %lu, eq->size: %u\n",
+	       new_event, eq->eq_deq_seq, eq->eq_size);
+
+	/* ...but did it overwrite an event we've not seen yet? */
+	if (eq->eq_deq_seq == new_event->sequence) {
+		rc = 1;
+	} else {
+		/*
+		 * don't complain with CERROR: some EQs are sized small
+		 * anyway; if it's important, the caller should complain
+		 */
+		CDEBUG(D_NET, "Event Queue Overflow: eq seq %lu ev seq %lu\n",
+		       eq->eq_deq_seq, new_event->sequence);
+		rc = -EOVERFLOW;
+	}
+
+	eq->eq_deq_seq = new_event->sequence + 1;
+	return rc;
+}
+
+/**
+ * A nonblocking function that can be used to get the next event in an EQ.
+ * If an event handler is associated with the EQ, the handler will run before
+ * this function returns successfully. The event is removed from the queue.
+ *
+ * \param eventq A handle for the event queue.
+ * \param event On successful return (1 or -EOVERFLOW), this location will
+ * hold the next event in the EQ.
+ *
+ * \retval 0	  No pending event in the EQ.
+ * \retval 1	  Indicates success.
+ * \retval -ENOENT    If \a eventq does not point to a valid EQ.
+ * \retval -EOVERFLOW Indicates success (i.e., an event is returned) and that
+ * at least one event between this event and the last event obtained from the
+ * EQ has been dropped due to limited space in the EQ.
+ */
+
+/**
+ * Block the calling process until there is an event in the EQ.
+ * If an event handler is associated with the EQ, the handler will run before
+ * this function returns successfully. This function returns the next event
+ * in the EQ and removes it from the EQ.
+ *
+ * \param eventq A handle for the event queue.
+ * \param event On successful return (1 or -EOVERFLOW), this location will
+ * hold the next event in the EQ.
+ *
+ * \retval 1	  Indicates success.
+ * \retval -ENOENT    If \a eventq does not point to a valid EQ.
+ * \retval -EOVERFLOW Indicates success (i.e., an event is returned) and that
+ * at least one event between this event and the last event obtained from the
+ * EQ has been dropped due to limited space in the EQ.
+ */
+
+static int
+lnet_eq_wait_locked(int *timeout_ms, long state)
+__must_hold(&the_lnet.ln_eq_wait_lock)
+{
+	int tms = *timeout_ms;
+	int wait;
+	wait_queue_entry_t wl;
+	unsigned long now;
+
+	if (!tms)
+		return -ENXIO; /* don't want to wait and no new event */
+
+	init_waitqueue_entry(&wl, current);
+	set_current_state(state);
+	add_wait_queue(&the_lnet.ln_eq_waitq, &wl);
+
+	lnet_eq_wait_unlock();
+
+	if (tms < 0) {
+		schedule();
+	} else {
+		now = jiffies;
+		schedule_msec_hrtimeout((tms));
+		tms -= jiffies_to_msecs(jiffies - now);
+		if (tms < 0) /* no more wait but may have new event */
+			tms = 0;
+	}
+
+	wait = tms; /* might need to call here again */
+	*timeout_ms = tms;
+
+	lnet_eq_wait_lock();
+	remove_wait_queue(&the_lnet.ln_eq_waitq, &wl);
+
+	return wait;
+}
+
+/**
+ * Block the calling process until there's an event from a set of EQs or
+ * timeout happens.
+ *
+ * If an event handler is associated with the EQ, the handler will run before
+ * this function returns successfully, in which case the corresponding event
+ * is consumed.
+ *
+ * LNetEQPoll() provides a timeout to allow applications to poll, block for a
+ * fixed period, or block indefinitely.
+ *
+ * \param eventqs,neq An array of EQ handles, and size of the array.
+ * \param timeout_ms Time in milliseconds to wait for an event to occur on
+ * one of the EQs. The constant LNET_TIME_FOREVER can be used to indicate an
+ * infinite timeout.
+ * \param interruptible, if true, use TASK_INTERRUPTIBLE, else TASK_NOLOAD
+ * \param event,which On successful return (1 or -EOVERFLOW), \a event will
+ * hold the next event in the EQs, and \a which will contain the index of the
+ * EQ from which the event was taken.
+ *
+ * \retval 0	  No pending event in the EQs after timeout.
+ * \retval 1	  Indicates success.
+ * \retval -EOVERFLOW Indicates success (i.e., an event is returned) and that
+ * at least one event between this event and the last event obtained from the
+ * EQ indicated by \a which has been dropped due to limited space in the EQ.
+ * \retval -ENOENT    If there's an invalid handle in \a eventqs.
+ */
+int
+LNetEQPoll(struct lnet_handle_eq *eventqs, int neq, int timeout_ms,
+	   int interruptible,
+	   struct lnet_event *event, int *which)
+{
+	int wait = 1;
+	int rc;
+	int i;
+
+	LASSERT(the_lnet.ln_refcount > 0);
+
+	if (neq < 1)
+		return -ENOENT;
+
+	lnet_eq_wait_lock();
+
+	for (;;) {
+		for (i = 0; i < neq; i++) {
+			struct lnet_eq *eq = lnet_handle2eq(&eventqs[i]);
+
+			if (!eq) {
+				lnet_eq_wait_unlock();
+				return -ENOENT;
+			}
+
+			rc = lnet_eq_dequeue_event(eq, event);
+			if (rc) {
+				lnet_eq_wait_unlock();
+				*which = i;
+				return rc;
+			}
+		}
+
+		if (!wait)
+			break;
+
+		/*
+		 * return value of lnet_eq_wait_locked:
+		 * -1 : did nothing and it's sure no new event
+		 *  1 : sleep inside and wait until new event
+		 *  0 : don't want to wait anymore, but might have new event
+		 *      so need to call dequeue again
+		 */
+		wait = lnet_eq_wait_locked(&timeout_ms,
+					   interruptible ? TASK_INTERRUPTIBLE
+					   : TASK_NOLOAD);
+		if (wait < 0) /* no new event */
+			break;
+	}
+
+	lnet_eq_wait_unlock();
+	return 0;
+}
diff --git a/drivers/staging/rts5208/rtsx.c b/drivers/staging/rts5208/rtsx.c
index 69e6abe14abf..7d23e214ac21 100644
--- a/drivers/staging/rts5208/rtsx.c
+++ b/drivers/staging/rts5208/rtsx.c
@@ -507,7 +507,7 @@ static int rtsx_polling_thread(void *__dev)
 
 	for (;;) {
 		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(msecs_to_jiffies(POLLING_INTERVAL));
+		schedule_msec_hrtimeout((POLLING_INTERVAL));
 
 		/* lock the device pointers */
 		mutex_lock(&dev->dev_mutex);
diff --git a/drivers/staging/speakup/speakup_acntpc.c b/drivers/staging/speakup/speakup_acntpc.c
index 28519754b2f0..a96805bbec5c 100644
--- a/drivers/staging/speakup/speakup_acntpc.c
+++ b/drivers/staging/speakup/speakup_acntpc.c
@@ -198,7 +198,7 @@ static void do_catch_up(struct spk_synth *synth)
 		full_time_val = full_time->u.n.value;
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		if (synth_full()) {
-			schedule_timeout(msecs_to_jiffies(full_time_val));
+			schedule_msec_hrtimeout((full_time_val));
 			continue;
 		}
 		set_current_state(TASK_RUNNING);
@@ -226,7 +226,7 @@ static void do_catch_up(struct spk_synth *synth)
 			jiffy_delta_val = jiffy_delta->u.n.value;
 			delay_time_val = delay_time->u.n.value;
 			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
-			schedule_timeout(msecs_to_jiffies(delay_time_val));
+			schedule_msec_hrtimeout(delay_time_val);
 			jiff_max = jiffies + jiffy_delta_val;
 		}
 	}
diff --git a/drivers/staging/speakup/speakup_apollo.c b/drivers/staging/speakup/speakup_apollo.c
index 0877b4044c28..627102d048c1 100644
--- a/drivers/staging/speakup/speakup_apollo.c
+++ b/drivers/staging/speakup/speakup_apollo.c
@@ -165,7 +165,7 @@ static void do_catch_up(struct spk_synth *synth)
 		if (!synth->io_ops->synth_out(synth, ch)) {
 			synth->io_ops->tiocmset(0, UART_MCR_RTS);
 			synth->io_ops->tiocmset(UART_MCR_RTS, 0);
-			schedule_timeout(msecs_to_jiffies(full_time_val));
+			schedule_msec_hrtimeout(full_time_val);
 			continue;
 		}
 		if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
diff --git a/drivers/staging/speakup/speakup_decext.c b/drivers/staging/speakup/speakup_decext.c
index 3741c0fcf5bb..bff857b4aa5f 100644
--- a/drivers/staging/speakup/speakup_decext.c
+++ b/drivers/staging/speakup/speakup_decext.c
@@ -176,7 +176,7 @@ static void do_catch_up(struct spk_synth *synth)
 		if (ch == '\n')
 			ch = 0x0D;
 		if (synth_full() || !synth->io_ops->synth_out(synth, ch)) {
-			schedule_timeout(msecs_to_jiffies(delay_time_val));
+			schedule_msec_hrtimeout(delay_time_val);
 			continue;
 		}
 		set_current_state(TASK_RUNNING);
diff --git a/drivers/staging/speakup/speakup_decpc.c b/drivers/staging/speakup/speakup_decpc.c
index 6649309e0342..c60e4712d817 100644
--- a/drivers/staging/speakup/speakup_decpc.c
+++ b/drivers/staging/speakup/speakup_decpc.c
@@ -394,7 +394,7 @@ static void do_catch_up(struct spk_synth *synth)
 		if (ch == '\n')
 			ch = 0x0D;
 		if (dt_sendchar(ch)) {
-			schedule_timeout(msecs_to_jiffies(delay_time_val));
+			schedule_msec_hrtimeout((delay_time_val));
 			continue;
 		}
 		set_current_state(TASK_RUNNING);
diff --git a/drivers/staging/speakup/speakup_dectlk.c b/drivers/staging/speakup/speakup_dectlk.c
index a144f28ee1a8..c34764fafe2b 100644
--- a/drivers/staging/speakup/speakup_dectlk.c
+++ b/drivers/staging/speakup/speakup_dectlk.c
@@ -244,7 +244,7 @@ static void do_catch_up(struct spk_synth *synth)
 		if (ch == '\n')
 			ch = 0x0D;
 		if (synth_full_val || !synth->io_ops->synth_out(synth, ch)) {
-			schedule_timeout(msecs_to_jiffies(delay_time_val));
+			schedule_msec_hrtimeout(delay_time_val);
 			continue;
 		}
 		set_current_state(TASK_RUNNING);
diff --git a/drivers/staging/speakup/speakup_dtlk.c b/drivers/staging/speakup/speakup_dtlk.c
index dbebed0eeeec..6d83c13ca4a6 100644
--- a/drivers/staging/speakup/speakup_dtlk.c
+++ b/drivers/staging/speakup/speakup_dtlk.c
@@ -211,7 +211,7 @@ static void do_catch_up(struct spk_synth *synth)
 		delay_time_val = delay_time->u.n.value;
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		if (synth_full()) {
-			schedule_timeout(msecs_to_jiffies(delay_time_val));
+			schedule_msec_hrtimeout((delay_time_val));
 			continue;
 		}
 		set_current_state(TASK_RUNNING);
@@ -227,7 +227,7 @@ static void do_catch_up(struct spk_synth *synth)
 			delay_time_val = delay_time->u.n.value;
 			jiffy_delta_val = jiffy_delta->u.n.value;
 			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
-			schedule_timeout(msecs_to_jiffies(delay_time_val));
+			schedule_msec_hrtimeout((delay_time_val));
 			jiff_max = jiffies + jiffy_delta_val;
 		}
 	}
diff --git a/drivers/staging/speakup/speakup_keypc.c b/drivers/staging/speakup/speakup_keypc.c
index 3901734982a4..4e8a7a98b46d 100644
--- a/drivers/staging/speakup/speakup_keypc.c
+++ b/drivers/staging/speakup/speakup_keypc.c
@@ -199,7 +199,7 @@ spin_lock_irqsave(&speakup_info.spinlock, flags);
 		full_time_val = full_time->u.n.value;
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		if (synth_full()) {
-			schedule_timeout(msecs_to_jiffies(full_time_val));
+			schedule_msec_hrtimeout((full_time_val));
 			continue;
 		}
 		set_current_state(TASK_RUNNING);
@@ -232,7 +232,7 @@ spin_lock_irqsave(&speakup_info.spinlock, flags);
 			jiffy_delta_val = jiffy_delta->u.n.value;
 			delay_time_val = delay_time->u.n.value;
 			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
-			schedule_timeout(msecs_to_jiffies(delay_time_val));
+			schedule_msec_hrtimeout((delay_time_val));
 			jiff_max = jiffies+jiffy_delta_val;
 		}
 	}
diff --git a/drivers/staging/speakup/synth.c b/drivers/staging/speakup/synth.c
index 25f259ee4ffc..b9721103e651 100644
--- a/drivers/staging/speakup/synth.c
+++ b/drivers/staging/speakup/synth.c
@@ -93,12 +93,8 @@ static void _spk_do_catch_up(struct spk_synth *synth, int unicode)
 		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 		if (ch == '\n')
 			ch = synth->procspeech;
-		if (unicode)
-			ret = synth->io_ops->synth_out_unicode(synth, ch);
-		else
-			ret = synth->io_ops->synth_out(synth, ch);
-		if (!ret) {
-			schedule_timeout(msecs_to_jiffies(full_time_val));
+		if (!synth->io_ops->synth_out(synth, ch)) {
+			schedule_msec_hrtimeout(full_time_val);
 			continue;
 		}
 		if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
@@ -108,11 +104,9 @@ static void _spk_do_catch_up(struct spk_synth *synth, int unicode)
 			full_time_val = full_time->u.n.value;
 			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 			if (synth->io_ops->synth_out(synth, synth->procspeech))
-				schedule_timeout(
-					msecs_to_jiffies(delay_time_val));
+				schedule_msec_hrtimeout(delay_time_val);
 			else
-				schedule_timeout(
-					msecs_to_jiffies(full_time_val));
+				schedule_msec_hrtimeout(full_time_val);
 			jiff_max = jiffies + jiffy_delta_val;
 		}
 		set_current_state(TASK_RUNNING);
diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c
index 3647b8f1ed28..9fb26ccc2b3b 100644
--- a/drivers/staging/unisys/visornic/visornic_main.c
+++ b/drivers/staging/unisys/visornic/visornic_main.c
@@ -549,7 +549,7 @@ static int visornic_disable_with_timeout(struct net_device *netdev,
 		}
 		set_current_state(TASK_INTERRUPTIBLE);
 		spin_unlock_irqrestore(&devdata->priv_lock, flags);
-		wait += schedule_timeout(msecs_to_jiffies(10));
+		wait += schedule_msec_hrtimeout((10));
 		spin_lock_irqsave(&devdata->priv_lock, flags);
 	}
 
@@ -560,7 +560,7 @@ static int visornic_disable_with_timeout(struct net_device *netdev,
 		while (1) {
 			set_current_state(TASK_INTERRUPTIBLE);
 			spin_unlock_irqrestore(&devdata->priv_lock, flags);
-			schedule_timeout(msecs_to_jiffies(10));
+			schedule_msec_hrtimeout((10));
 			spin_lock_irqsave(&devdata->priv_lock, flags);
 			if (atomic_read(&devdata->usage))
 				break;
@@ -714,7 +714,7 @@ static int visornic_enable_with_timeout(struct net_device *netdev,
 		}
 		set_current_state(TASK_INTERRUPTIBLE);
 		spin_unlock_irqrestore(&devdata->priv_lock, flags);
-		wait += schedule_timeout(msecs_to_jiffies(10));
+		wait += schedule_msec_hrtimeout((10));
 		spin_lock_irqsave(&devdata->priv_lock, flags);
 	}
 
diff --git a/drivers/video/fbdev/omap/hwa742.c b/drivers/video/fbdev/omap/hwa742.c
index 6199d4806193..7c7165f2dad4 100644
--- a/drivers/video/fbdev/omap/hwa742.c
+++ b/drivers/video/fbdev/omap/hwa742.c
@@ -926,7 +926,7 @@ static void hwa742_resume(void)
 		if (hwa742_read_reg(HWA742_PLL_DIV_REG) & (1 << 7))
 			break;
 		set_current_state(TASK_UNINTERRUPTIBLE);
-		schedule_timeout(msecs_to_jiffies(5));
+		schedule_msec_hrtimeout((5));
 	}
 	hwa742_set_update_mode(hwa742.update_mode_before_suspend);
 }
diff --git a/drivers/video/fbdev/pxafb.c b/drivers/video/fbdev/pxafb.c
index bbed039617a4..681ae041ea77 100644
--- a/drivers/video/fbdev/pxafb.c
+++ b/drivers/video/fbdev/pxafb.c
@@ -1287,7 +1287,7 @@ static int pxafb_smart_thread(void *arg)
 		mutex_unlock(&fbi->ctrlr_lock);
 
 		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(msecs_to_jiffies(30));
+		schedule_msec_hrtimeout((30));
 	}
 
 	pr_debug("%s(): task ending\n", __func__);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2d9074295d7f..7df3e60e4e89 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5905,7 +5905,7 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes)
 			flush = BTRFS_RESERVE_FLUSH_LIMIT;
 
 		if (btrfs_transaction_in_commit(fs_info))
-			schedule_timeout(1);
+			schedule_min_hrtimeout();
 	}
 
 	if (delalloc_lock)
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index ffca2abf13d0..89b2a7f7397e 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -75,7 +75,7 @@ static int caching_kthread(void *data)
 				btrfs_release_path(path);
 				root->ino_cache_progress = last;
 				up_read(&fs_info->commit_root_sem);
-				schedule_timeout(1);
+				schedule_min_hrtimeout();
 				goto again;
 			} else
 				continue;
diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c
index 72c6f8e82a7e..46d8c2a148ad 100644
--- a/sound/usb/line6/pcm.c
+++ b/sound/usb/line6/pcm.c
@@ -131,7 +131,7 @@ static void line6_wait_clear_audio_urbs(struct snd_line6_pcm *line6pcm,
 		if (!alive)
 			break;
 		set_current_state(TASK_UNINTERRUPTIBLE);
-		schedule_timeout(1);
+		schedule_min_hrtimeout();
 	} while (--timeout > 0);
 	if (alive)
 		dev_err(line6pcm->line6->ifcdev,
-- 
2.17.1