linux/debian/patches-rt/0285-workqueue-rework.patch

From 62a1275f96f99d9eba5dcf763609bcb9b5a0a41e Mon Sep 17 00:00:00 2001
Message-Id: <62a1275f96f99d9eba5dcf763609bcb9b5a0a41e.1601675153.git.zanussi@kernel.org>
In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 29 May 2019 18:52:27 +0200
Subject: [PATCH 285/333] workqueue: rework
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz

[ Upstream commit d15a862f24df983458533aebd6fa207ecdd1095a ]

This is an all-in change of the workqueue rework.
The worker_pool.lock is made to raw_spinlock_t. With this change we can
schedule workitems from preempt-disable sections and sections with disabled
interrupts. This change allows to remove all kthread_.* workarounds we used to
have.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 block/blk-core.c                       |   6 +-
 drivers/block/loop.c                   |   2 +-
 drivers/spi/spi-rockchip.c             |   1 -
 drivers/thermal/x86_pkg_temp_thermal.c |  28 +--
 fs/aio.c                               |  10 +-
 include/linux/blk-cgroup.h             |   2 +-
 include/linux/blkdev.h                 |   2 +-
 include/linux/kthread-cgroup.h         |  17 --
 include/linux/kthread.h                |  15 +-
 include/linux/swait.h                  |  14 ++
 include/linux/workqueue.h              |   4 -
 init/main.c                            |   1 -
 kernel/kthread.c                       |  14 --
 kernel/sched/core.c                    |   1 +
 kernel/time/hrtimer.c                  |  24 --
 kernel/workqueue.c                     | 304 +++++++++++--------------
 16 files changed, 163 insertions(+), 282 deletions(-)
 delete mode 100644 include/linux/kthread-cgroup.h

diff --git a/block/blk-core.c b/block/blk-core.c
index 1a2ec9f3323a..77596d604867 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -973,7 +973,7 @@ void blk_queue_exit(struct request_queue *q)
 	percpu_ref_put(&q->q_usage_counter);
 }
 
-static void blk_queue_usage_counter_release_wrk(struct kthread_work *work)
+static void blk_queue_usage_counter_release_wrk(struct work_struct *work)
 {
 	struct request_queue *q =
 		container_of(work, struct request_queue, mq_pcpu_wake);
@@ -987,7 +987,7 @@ static void blk_queue_usage_counter_release(struct percpu_ref *ref)
 		container_of(ref, struct request_queue, q_usage_counter);
 
 	if (wq_has_sleeper(&q->mq_freeze_wq))
-		kthread_schedule_work(&q->mq_pcpu_wake);
+		schedule_work(&q->mq_pcpu_wake);
 }
 
 static void blk_rq_timed_out_timer(struct timer_list *t)
@@ -1086,7 +1086,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id,
 	queue_flag_set_unlocked(QUEUE_FLAG_BYPASS, q);
 
 	init_waitqueue_head(&q->mq_freeze_wq);
-	kthread_init_work(&q->mq_pcpu_wake, blk_queue_usage_counter_release_wrk);
+	INIT_WORK(&q->mq_pcpu_wake, blk_queue_usage_counter_release_wrk);
 
 	/*
 	 * Init percpu_ref in atomic mode so that it's faster to shutdown.
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 629589a36b0a..19042b42a8ba 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -70,7 +70,7 @@
 #include <linux/writeback.h>
 #include <linux/completion.h>
 #include <linux/highmem.h>
-#include <linux/kthread-cgroup.h>
+#include <linux/kthread.h>
 #include <linux/splice.h>
 #include <linux/sysfs.h>
 #include <linux/miscdevice.h>
diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index 63b10236eb05..185bbdce62b1 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -22,7 +22,6 @@
 #include <linux/spi/spi.h>
 #include <linux/pm_runtime.h>
 #include <linux/scatterlist.h>
-#include <linux/interrupt.h>
 
 #define DRIVER_NAME "rockchip-spi"
 
diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c
index 82f21fd4afb0..1ef937d799e4 100644
--- a/drivers/thermal/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/x86_pkg_temp_thermal.c
@@ -29,7 +29,6 @@
 #include <linux/pm.h>
 #include <linux/thermal.h>
 #include <linux/debugfs.h>
-#include <linux/kthread.h>
 #include <asm/cpu_device_id.h>
 #include <asm/mce.h>
 
@@ -330,7 +329,7 @@ static void pkg_thermal_schedule_work(int cpu, struct delayed_work *work)
 	schedule_delayed_work_on(cpu, work, ms);
 }
 
-static void pkg_thermal_notify_work(struct kthread_work *work)
+static int pkg_thermal_notify(u64 msr_val)
 {
 	int cpu = smp_processor_id();
 	struct pkg_device *pkgdev;
@@ -349,32 +348,8 @@ static void pkg_thermal_notify_work(struct kthread_work *work)
 	}
 
 	spin_unlock_irqrestore(&pkg_temp_lock, flags);
-}
-
-#ifdef CONFIG_PREEMPT_RT_FULL
-static DEFINE_KTHREAD_WORK(notify_work, pkg_thermal_notify_work);
-
-static int pkg_thermal_notify(u64 msr_val)
-{
-	kthread_schedule_work(&notify_work);
-	return 0;
-}
-
-static void pkg_thermal_notify_flush(void)
-{
-	kthread_flush_work(&notify_work);
-}
-
-#else  /* !CONFIG_PREEMPT_RT_FULL */
-
-static void pkg_thermal_notify_flush(void) { }
-
-static int pkg_thermal_notify(u64 msr_val)
-{
-	pkg_thermal_notify_work(NULL);
 	return 0;
 }
-#endif /* CONFIG_PREEMPT_RT_FULL */
 
 static int pkg_temp_thermal_device_add(unsigned int cpu)
 {
@@ -573,7 +548,6 @@ static void __exit pkg_temp_thermal_exit(void)
 	platform_thermal_package_rate_control = NULL;
 
 	cpuhp_remove_state(pkg_thermal_hp_state);
-	pkg_thermal_notify_flush();
 	debugfs_remove_recursive(debugfs);
 	kfree(packages);
 }
diff --git a/fs/aio.c b/fs/aio.c
index 5b3462fb3433..2219713e755c 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -121,7 +121,7 @@ struct kioctx {
 	long			nr_pages;
 
 	struct rcu_work		free_rwork;	/* see free_ioctx() */
-	struct kthread_work	free_kwork;	/* see free_ioctx() */
+	struct work_struct	free_work;	/* see free_ioctx() */
 
 	/*
 	 * signals when all in-flight requests are done
@@ -608,9 +608,9 @@ static void free_ioctx_reqs(struct percpu_ref *ref)
  * and ctx->users has dropped to 0, so we know no more kiocbs can be submitted -
  * now it's safe to cancel any that need to be.
  */
-static void free_ioctx_users_work(struct kthread_work *work)
+static void free_ioctx_users_work(struct work_struct *work)
 {
-	struct kioctx *ctx = container_of(work, struct kioctx, free_kwork);
+	struct kioctx *ctx = container_of(work, struct kioctx, free_work);
 	struct aio_kiocb *req;
 
 	spin_lock_irq(&ctx->ctx_lock);
@@ -632,8 +632,8 @@ static void free_ioctx_users(struct percpu_ref *ref)
 {
 	struct kioctx *ctx = container_of(ref, struct kioctx, users);
 
-	kthread_init_work(&ctx->free_kwork, free_ioctx_users_work);
-	kthread_schedule_work(&ctx->free_kwork);
+	INIT_WORK(&ctx->free_work, free_ioctx_users_work);
+	schedule_work(&ctx->free_work);
 }
 
 static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm)
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 0473efda4c65..da587e60fe86 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -14,7 +14,7 @@
  * 	              Nauman Rafique <nauman@google.com>
  */
 
-#include <linux/kthread-cgroup.h>
+#include <linux/kthread.h>
 #include <linux/percpu_counter.h>
 #include <linux/seq_file.h>
 #include <linux/radix-tree.h>
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 066b59dc380f..59763af05194 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -656,7 +656,7 @@ struct request_queue {
 #endif
 	struct rcu_head		rcu_head;
 	wait_queue_head_t	mq_freeze_wq;
-	struct kthread_work	mq_pcpu_wake;
+	struct work_struct	mq_pcpu_wake;
 	struct percpu_ref	q_usage_counter;
 	struct list_head	all_q_node;
 
diff --git a/include/linux/kthread-cgroup.h b/include/linux/kthread-cgroup.h
deleted file mode 100644
index 53d34bca9d72..000000000000
--- a/include/linux/kthread-cgroup.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LINUX_KTHREAD_CGROUP_H
-#define _LINUX_KTHREAD_CGROUP_H
-#include <linux/kthread.h>
-#include <linux/cgroup.h>
-
-#ifdef CONFIG_BLK_CGROUP
-void kthread_associate_blkcg(struct cgroup_subsys_state *css);
-struct cgroup_subsys_state *kthread_blkcg(void);
-#else
-static inline void kthread_associate_blkcg(struct cgroup_subsys_state *css) { }
-static inline struct cgroup_subsys_state *kthread_blkcg(void)
-{
-	return NULL;
-}
-#endif
-#endif
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index 7cf56eb54103..6b8c064f0cbc 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -4,6 +4,7 @@
 /* Simple interface for creating and stopping kernel threads without mess. */
 #include <linux/err.h>
 #include <linux/sched.h>
+#include <linux/cgroup.h>
 
 __printf(4, 5)
 struct task_struct *kthread_create_on_node(int (*threadfn)(void *data),
@@ -197,12 +198,14 @@ bool kthread_cancel_delayed_work_sync(struct kthread_delayed_work *work);
 
 void kthread_destroy_worker(struct kthread_worker *worker);
 
-extern struct kthread_worker kthread_global_worker;
-void kthread_init_global_worker(void);
-
-static inline bool kthread_schedule_work(struct kthread_work *work)
+#ifdef CONFIG_BLK_CGROUP
+void kthread_associate_blkcg(struct cgroup_subsys_state *css);
+struct cgroup_subsys_state *kthread_blkcg(void);
+#else
+static inline void kthread_associate_blkcg(struct cgroup_subsys_state *css) { }
+static inline struct cgroup_subsys_state *kthread_blkcg(void)
 {
-	return kthread_queue_work(&kthread_global_worker, work);
+	return NULL;
 }
-
+#endif
 #endif /* _LINUX_KTHREAD_H */
diff --git a/include/linux/swait.h b/include/linux/swait.h
index f426a0661aa0..21ae66cd41d3 100644
--- a/include/linux/swait.h
+++ b/include/linux/swait.h
@@ -299,4 +299,18 @@ do {									\
 	__ret;								\
 })
 
+#define __swait_event_lock_irq(wq, condition, lock, cmd)		\
+	___swait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0,		\
+		       raw_spin_unlock_irq(&lock);			\
+		       cmd;						\
+		       schedule();					\
+		       raw_spin_lock_irq(&lock))
+
+#define swait_event_lock_irq(wq_head, condition, lock)			\
+	do {								\
+		if (condition)						\
+			break;						\
+		__swait_event_lock_irq(wq_head, condition, lock, );	\
+	} while (0)
+
 #endif /* _LINUX_SWAIT_H */
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 60d673e15632..546aa73fba6a 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -455,10 +455,6 @@ __alloc_workqueue_key(const char *fmt, unsigned int flags, int max_active,
 
 extern void destroy_workqueue(struct workqueue_struct *wq);
 
-struct workqueue_attrs *alloc_workqueue_attrs(gfp_t gfp_mask);
-void free_workqueue_attrs(struct workqueue_attrs *attrs);
-int apply_workqueue_attrs(struct workqueue_struct *wq,
-			  const struct workqueue_attrs *attrs);
 int workqueue_set_unbound_cpumask(cpumask_var_t cpumask);
 
 extern bool queue_work_on(int cpu, struct workqueue_struct *wq,
diff --git a/init/main.c b/init/main.c
index 7b173ca08e22..2180c6388eb9 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1130,7 +1130,6 @@ static noinline void __init kernel_init_freeable(void)
 	smp_prepare_cpus(setup_max_cpus);
 
 	workqueue_init();
-	kthread_init_global_worker();
 
 	init_mm_internals();
 
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 42294c806ad0..81aa14daa5fe 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -20,7 +20,6 @@
 #include <linux/freezer.h>
 #include <linux/ptrace.h>
 #include <linux/uaccess.h>
-#include <linux/cgroup.h>
 #include <trace/events/sched.h>
 
 static DEFINE_SPINLOCK(kthread_create_lock);
@@ -1194,19 +1193,6 @@ void kthread_destroy_worker(struct kthread_worker *worker)
 }
 EXPORT_SYMBOL(kthread_destroy_worker);
 
-DEFINE_KTHREAD_WORKER(kthread_global_worker);
-EXPORT_SYMBOL(kthread_global_worker);
-
-__init void kthread_init_global_worker(void)
-{
-	kthread_global_worker.task = kthread_create(kthread_worker_fn,
-						    &kthread_global_worker,
-						    "kswork");
-	if (WARN_ON(IS_ERR(kthread_global_worker.task)))
-		return;
-	wake_up_process(kthread_global_worker.task);
-}
-
 #ifdef CONFIG_BLK_CGROUP
 /**
  * kthread_associate_blkcg - associate blkcg to current kthread
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 9337303a9f43..c9a83db14cde 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3609,6 +3609,7 @@ static inline void sched_submit_work(struct task_struct *tsk)
 {
 	if (!tsk->state)
 		return;
+
 	/*
 	 * If a worker went to sleep, notify and ask workqueue whether
 	 * it wants to wake up a task to maintain concurrency.
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index ed5d8d51ca91..94d97eae0a46 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -730,29 +730,6 @@ static void hrtimer_switch_to_hres(void)
 	retrigger_next_event(NULL);
 }
 
-#ifdef CONFIG_PREEMPT_RT_FULL
-
-static struct swork_event clock_set_delay_work;
-
-static void run_clock_set_delay(struct swork_event *event)
-{
-	clock_was_set();
-}
-
-void clock_was_set_delayed(void)
-{
-	swork_queue(&clock_set_delay_work);
-}
-
-static __init int create_clock_set_delay_thread(void)
-{
-	WARN_ON(swork_get());
-	INIT_SWORK(&clock_set_delay_work, run_clock_set_delay);
-	return 0;
-}
-early_initcall(create_clock_set_delay_thread);
-#else /* PREEMPT_RT_FULL */
-
 static void clock_was_set_work(struct work_struct *work)
 {
 	clock_was_set();
@@ -768,7 +745,6 @@ void clock_was_set_delayed(void)
 {
 	schedule_work(&hrtimer_work);
 }
-#endif
 
 #else
 
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 9c10264d2679..e6a96fe8896b 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -49,8 +49,6 @@
 #include <linux/uaccess.h>
 #include <linux/sched/isolation.h>
 #include <linux/nmi.h>
-#include <linux/locallock.h>
-#include <linux/delay.h>
 
 #include "workqueue_internal.h"
 
@@ -125,11 +123,6 @@ enum {
  *    cpu or grabbing pool->lock is enough for read access.  If
  *    POOL_DISASSOCIATED is set, it's identical to L.
  *
- *    On RT we need the extra protection via rt_lock_idle_list() for
- *    the list manipulations against read access from
- *    wq_worker_sleeping(). All other places are nicely serialized via
- *    pool->lock.
- *
  * A: wq_pool_attach_mutex protected.
  *
  * PL: wq_pool_mutex protected.
@@ -151,7 +144,7 @@ enum {
 /* struct worker is defined in workqueue_internal.h */
 
 struct worker_pool {
-	spinlock_t		lock;		/* the pool lock */
+	raw_spinlock_t		lock;		/* the pool lock */
 	int			cpu;		/* I: the associated cpu */
 	int			node;		/* I: the associated node ID */
 	int			id;		/* I: pool ID */
@@ -304,8 +297,8 @@ static struct workqueue_attrs *wq_update_unbound_numa_attrs_buf;
 
 static DEFINE_MUTEX(wq_pool_mutex);	/* protects pools and workqueues list */
 static DEFINE_MUTEX(wq_pool_attach_mutex); /* protects worker attach/detach */
-static DEFINE_SPINLOCK(wq_mayday_lock);	/* protects wq->maydays list */
-static DECLARE_WAIT_QUEUE_HEAD(wq_manager_wait); /* wait for manager to go away */
+static DEFINE_RAW_SPINLOCK(wq_mayday_lock);	/* protects wq->maydays list */
+static DECLARE_SWAIT_QUEUE_HEAD(wq_manager_wait); /* wait for manager to go away */
 
 static LIST_HEAD(workqueues);		/* PR: list of all workqueues */
 static bool workqueue_freezing;		/* PL: have wqs started freezing? */
@@ -357,8 +350,6 @@ EXPORT_SYMBOL_GPL(system_power_efficient_wq);
 struct workqueue_struct *system_freezable_power_efficient_wq __read_mostly;
 EXPORT_SYMBOL_GPL(system_freezable_power_efficient_wq);
 
-static DEFINE_LOCAL_IRQ_LOCK(pendingb_lock);
-
 static int worker_thread(void *__worker);
 static void workqueue_sysfs_unregister(struct workqueue_struct *wq);
 
@@ -435,31 +426,6 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq);
 		if (({ assert_rcu_or_wq_mutex(wq); false; })) { }	\
 		else
 
-#ifdef CONFIG_PREEMPT_RT_BASE
-static inline void rt_lock_idle_list(struct worker_pool *pool)
-{
-	preempt_disable();
-}
-static inline void rt_unlock_idle_list(struct worker_pool *pool)
-{
-	preempt_enable();
-}
-static inline void sched_lock_idle_list(struct worker_pool *pool) { }
-static inline void sched_unlock_idle_list(struct worker_pool *pool) { }
-#else
-static inline void rt_lock_idle_list(struct worker_pool *pool) { }
-static inline void rt_unlock_idle_list(struct worker_pool *pool) { }
-static inline void sched_lock_idle_list(struct worker_pool *pool)
-{
-	spin_lock_irq(&pool->lock);
-}
-static inline void sched_unlock_idle_list(struct worker_pool *pool)
-{
-	spin_unlock_irq(&pool->lock);
-}
-#endif
-
-
 #ifdef CONFIG_DEBUG_OBJECTS_WORK
 
 static struct debug_obj_descr work_debug_descr;
@@ -862,20 +828,14 @@ static struct worker *first_idle_worker(struct worker_pool *pool)
  * Wake up the first idle worker of @pool.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void wake_up_worker(struct worker_pool *pool)
 {
-	struct worker *worker;
-
-	rt_lock_idle_list(pool);
-
-	worker = first_idle_worker(pool);
+	struct worker *worker = first_idle_worker(pool);
 
 	if (likely(worker))
 		wake_up_process(worker->task);
-
-	rt_unlock_idle_list(pool);
 }
 
 /**
@@ -904,7 +864,7 @@ void wq_worker_running(struct task_struct *task)
  */
 void wq_worker_sleeping(struct task_struct *task)
 {
-	struct worker *worker = kthread_data(task);
+	struct worker *next, *worker = kthread_data(task);
 	struct worker_pool *pool;
 
 	/*
@@ -921,18 +881,26 @@ void wq_worker_sleeping(struct task_struct *task)
 		return;
 
 	worker->sleeping = 1;
+	raw_spin_lock_irq(&pool->lock);
 
 	/*
 	 * The counterpart of the following dec_and_test, implied mb,
 	 * worklist not empty test sequence is in insert_work().
 	 * Please read comment there.
+	 *
+	 * NOT_RUNNING is clear.  This means that we're bound to and
+	 * running on the local cpu w/ rq lock held and preemption
+	 * disabled, which in turn means that none else could be
+	 * manipulating idle_list, so dereferencing idle_list without pool
+	 * lock is safe.
 	 */
 	if (atomic_dec_and_test(&pool->nr_running) &&
 	    !list_empty(&pool->worklist)) {
-		sched_lock_idle_list(pool);
-		wake_up_worker(pool);
-		sched_unlock_idle_list(pool);
+		next = first_idle_worker(pool);
+		if (next)
+			wake_up_process(next->task);
 	}
+	raw_spin_unlock_irq(&pool->lock);
 }
 
 /**
@@ -943,7 +911,7 @@ void wq_worker_sleeping(struct task_struct *task)
  * Set @flags in @worker->flags and adjust nr_running accordingly.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock)
+ * raw_spin_lock_irq(pool->lock)
  */
 static inline void worker_set_flags(struct worker *worker, unsigned int flags)
 {
@@ -968,7 +936,7 @@ static inline void worker_set_flags(struct worker *worker, unsigned int flags)
  * Clear @flags in @worker->flags and adjust nr_running accordingly.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock)
+ * raw_spin_lock_irq(pool->lock)
  */
 static inline void worker_clr_flags(struct worker *worker, unsigned int flags)
 {
@@ -1016,7 +984,7 @@ static inline void worker_clr_flags(struct worker *worker, unsigned int flags)
  * actually occurs, it should be easy to locate the culprit work function.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  *
  * Return:
  * Pointer to worker which is executing @work if found, %NULL
@@ -1051,7 +1019,7 @@ static struct worker *find_worker_executing_work(struct worker_pool *pool,
  * nested inside outer list_for_each_entry_safe().
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void move_linked_works(struct work_struct *work, struct list_head *head,
 			      struct work_struct **nextp)
@@ -1129,11 +1097,9 @@ static void put_pwq_unlocked(struct pool_workqueue *pwq)
 		 * As both pwqs and pools are RCU protected, the
 		 * following lock operations are safe.
 		 */
-		rcu_read_lock();
-		local_spin_lock_irq(pendingb_lock, &pwq->pool->lock);
+		raw_spin_lock_irq(&pwq->pool->lock);
 		put_pwq(pwq);
-		local_spin_unlock_irq(pendingb_lock, &pwq->pool->lock);
-		rcu_read_unlock();
+		raw_spin_unlock_irq(&pwq->pool->lock);
 	}
 }
 
@@ -1166,7 +1132,7 @@ static void pwq_activate_first_delayed(struct pool_workqueue *pwq)
  * decrement nr_in_flight of its pwq and handle workqueue flushing.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void pwq_dec_nr_in_flight(struct pool_workqueue *pwq, int color)
 {
@@ -1237,7 +1203,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 	struct worker_pool *pool;
 	struct pool_workqueue *pwq;
 
-	local_lock_irqsave(pendingb_lock, *flags);
+	local_irq_save(*flags);
 
 	/* try to steal the timer if it exists */
 	if (is_dwork) {
@@ -1265,7 +1231,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 	if (!pool)
 		goto fail;
 
-	spin_lock(&pool->lock);
+	raw_spin_lock(&pool->lock);
 	/*
 	 * work->data is guaranteed to point to pwq only while the work
 	 * item is queued on pwq->wq, and both updating work->data to point
@@ -1294,17 +1260,17 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 		/* work->data points to pwq iff queued, point to pool */
 		set_work_pool_and_keep_pending(work, pool->id);
 
-		spin_unlock(&pool->lock);
+		raw_spin_unlock(&pool->lock);
 		rcu_read_unlock();
 		return 1;
 	}
-	spin_unlock(&pool->lock);
+	raw_spin_unlock(&pool->lock);
 fail:
 	rcu_read_unlock();
-	local_unlock_irqrestore(pendingb_lock, *flags);
+	local_irq_restore(*flags);
 	if (work_is_canceling(work))
 		return -ENOENT;
-	cpu_chill();
+	cpu_relax();
 	return -EAGAIN;
 }
 
@@ -1319,7 +1285,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
  * work_struct flags.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void insert_work(struct pool_workqueue *pwq, struct work_struct *work,
 			struct list_head *head, unsigned int extra_flags)
@@ -1406,13 +1372,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
 	 * queued or lose PENDING.  Grabbing PENDING and queueing should
 	 * happen with IRQ disabled.
 	 */
-#ifndef CONFIG_PREEMPT_RT_FULL
-	/*
-	 * nort: On RT the "interrupts-disabled" rule has been replaced with
-	 * pendingb_lock.
-	 */
 	lockdep_assert_irqs_disabled();
-#endif
 
 	debug_work_activate(work);
 
@@ -1442,7 +1402,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
 	if (last_pool && last_pool != pwq->pool) {
 		struct worker *worker;
 
-		spin_lock(&last_pool->lock);
+		raw_spin_lock(&last_pool->lock);
 
 		worker = find_worker_executing_work(last_pool, work);
 
@@ -1450,11 +1410,11 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
 			pwq = worker->current_pwq;
 		} else {
 			/* meh... not running there, queue here */
-			spin_unlock(&last_pool->lock);
-			spin_lock(&pwq->pool->lock);
+			raw_spin_unlock(&last_pool->lock);
+			raw_spin_lock(&pwq->pool->lock);
 		}
 	} else {
-		spin_lock(&pwq->pool->lock);
+		raw_spin_lock(&pwq->pool->lock);
 	}
 
 	/*
@@ -1467,7 +1427,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
 	 */
 	if (unlikely(!pwq->refcnt)) {
 		if (wq->flags & WQ_UNBOUND) {
-			spin_unlock(&pwq->pool->lock);
+			raw_spin_unlock(&pwq->pool->lock);
 			cpu_relax();
 			goto retry;
 		}
@@ -1499,7 +1459,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
 	insert_work(pwq, work, worklist, work_flags);
 
 out:
-	spin_unlock(&pwq->pool->lock);
+	raw_spin_unlock(&pwq->pool->lock);
 	rcu_read_unlock();
 }
 
@@ -1520,14 +1480,14 @@ bool queue_work_on(int cpu, struct workqueue_struct *wq,
 	bool ret = false;
 	unsigned long flags;
 
-	local_lock_irqsave(pendingb_lock,flags);
+	local_irq_save(flags);
 
 	if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) {
 		__queue_work(cpu, wq, work);
 		ret = true;
 	}
 
-	local_unlock_irqrestore(pendingb_lock, flags);
+	local_irq_restore(flags);
 	return ret;
 }
 EXPORT_SYMBOL(queue_work_on);
@@ -1535,12 +1495,11 @@ EXPORT_SYMBOL(queue_work_on);
 void delayed_work_timer_fn(struct timer_list *t)
 {
 	struct delayed_work *dwork = from_timer(dwork, t, timer);
+	unsigned long flags;
 
-	/* XXX */
-	/* local_lock(pendingb_lock); */
-	/* should have been called from irqsafe timer with irq already off */
+	local_irq_save(flags);
 	__queue_work(dwork->cpu, dwork->wq, &dwork->work);
-	/* local_unlock(pendingb_lock); */
+	local_irq_restore(flags);
 }
 EXPORT_SYMBOL(delayed_work_timer_fn);
 
@@ -1595,14 +1554,14 @@ bool queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
 	unsigned long flags;
 
 	/* read the comment in __queue_work() */
-	local_lock_irqsave(pendingb_lock, flags);
+	local_irq_save(flags);
 
 	if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) {
 		__queue_delayed_work(cpu, wq, dwork, delay);
 		ret = true;
 	}
 
-	local_unlock_irqrestore(pendingb_lock, flags);
+	local_irq_restore(flags);
 	return ret;
 }
 EXPORT_SYMBOL(queue_delayed_work_on);
@@ -1637,7 +1596,7 @@ bool mod_delayed_work_on(int cpu, struct workqueue_struct *wq,
 
 	if (likely(ret >= 0)) {
 		__queue_delayed_work(cpu, wq, dwork, delay);
-		local_unlock_irqrestore(pendingb_lock, flags);
+		local_irq_restore(flags);
 	}
 
 	/* -ENOENT from try_to_grab_pending() becomes %true */
@@ -1648,12 +1607,11 @@ EXPORT_SYMBOL_GPL(mod_delayed_work_on);
 static void rcu_work_rcufn(struct rcu_head *rcu)
 {
 	struct rcu_work *rwork = container_of(rcu, struct rcu_work, rcu);
-	unsigned long flags;
 
 	/* read the comment in __queue_work() */
-	local_lock_irqsave(pendingb_lock, flags);
+	local_irq_disable();
 	__queue_work(WORK_CPU_UNBOUND, rwork->wq, &rwork->work);
-	local_unlock_irqrestore(pendingb_lock, flags);
+	local_irq_enable();
 }
 
 /**
@@ -1688,7 +1646,7 @@ EXPORT_SYMBOL(queue_rcu_work);
  * necessary.
  *
  * LOCKING:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void worker_enter_idle(struct worker *worker)
 {
@@ -1705,9 +1663,7 @@ static void worker_enter_idle(struct worker *worker)
 	worker->last_active = jiffies;
 
 	/* idle_list is LIFO */
-	rt_lock_idle_list(pool);
 	list_add(&worker->entry, &pool->idle_list);
-	rt_unlock_idle_list(pool);
 
 	if (too_many_workers(pool) && !timer_pending(&pool->idle_timer))
 		mod_timer(&pool->idle_timer, jiffies + IDLE_WORKER_TIMEOUT);
@@ -1730,7 +1686,7 @@ static void worker_enter_idle(struct worker *worker)
  * @worker is leaving idle state.  Update stats.
  *
  * LOCKING:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void worker_leave_idle(struct worker *worker)
 {
@@ -1740,9 +1696,7 @@ static void worker_leave_idle(struct worker *worker)
 		return;
 	worker_clr_flags(worker, WORKER_IDLE);
 	pool->nr_idle--;
-	rt_lock_idle_list(pool);
 	list_del_init(&worker->entry);
-	rt_unlock_idle_list(pool);
 }
 
 static struct worker *alloc_worker(int node)
@@ -1870,11 +1824,11 @@ static struct worker *create_worker(struct worker_pool *pool)
 	worker_attach_to_pool(worker, pool);
 
 	/* start the newly created worker */
-	spin_lock_irq(&pool->lock);
+	raw_spin_lock_irq(&pool->lock);
 	worker->pool->nr_workers++;
 	worker_enter_idle(worker);
 	wake_up_process(worker->task);
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 
 	return worker;
 
@@ -1893,7 +1847,7 @@ static struct worker *create_worker(struct worker_pool *pool)
  * be idle.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void destroy_worker(struct worker *worker)
 {
@@ -1910,9 +1864,7 @@ static void destroy_worker(struct worker *worker)
 	pool->nr_workers--;
 	pool->nr_idle--;
 
-	rt_lock_idle_list(pool);
 	list_del_init(&worker->entry);
-	rt_unlock_idle_list(pool);
 	worker->flags |= WORKER_DIE;
 	wake_up_process(worker->task);
 }
@@ -1921,7 +1873,7 @@ static void idle_worker_timeout(struct timer_list *t)
 {
 	struct worker_pool *pool = from_timer(pool, t, idle_timer);
 
-	spin_lock_irq(&pool->lock);
+	raw_spin_lock_irq(&pool->lock);
 
 	while (too_many_workers(pool)) {
 		struct worker *worker;
@@ -1939,7 +1891,7 @@ static void idle_worker_timeout(struct timer_list *t)
 		destroy_worker(worker);
 	}
 
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 }
 
 static void send_mayday(struct work_struct *work)
@@ -1970,8 +1922,8 @@ static void pool_mayday_timeout(struct timer_list *t)
 	struct worker_pool *pool = from_timer(pool, t, mayday_timer);
 	struct work_struct *work;
 
-	spin_lock_irq(&pool->lock);
-	spin_lock(&wq_mayday_lock);		/* for wq->maydays */
+	raw_spin_lock_irq(&pool->lock);
+	raw_spin_lock(&wq_mayday_lock);		/* for wq->maydays */
 
 	if (need_to_create_worker(pool)) {
 		/*
@@ -1984,8 +1936,8 @@ static void pool_mayday_timeout(struct timer_list *t)
 			send_mayday(work);
 	}
 
-	spin_unlock(&wq_mayday_lock);
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock(&wq_mayday_lock);
+	raw_spin_unlock_irq(&pool->lock);
 
 	mod_timer(&pool->mayday_timer, jiffies + MAYDAY_INTERVAL);
 }
@@ -2004,7 +1956,7 @@ static void pool_mayday_timeout(struct timer_list *t)
  * may_start_working() %true.
  *
  * LOCKING:
- * spin_lock_irq(pool->lock) which may be released and regrabbed
+ * raw_spin_lock_irq(pool->lock) which may be released and regrabbed
  * multiple times.  Does GFP_KERNEL allocations.  Called only from
  * manager.
  */
@@ -2013,7 +1965,7 @@ __releases(&pool->lock)
 __acquires(&pool->lock)
 {
 restart:
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 
 	/* if we don't make progress in MAYDAY_INITIAL_TIMEOUT, call for help */
 	mod_timer(&pool->mayday_timer, jiffies + MAYDAY_INITIAL_TIMEOUT);
@@ -2029,7 +1981,7 @@ __acquires(&pool->lock)
 	}
 
 	del_timer_sync(&pool->mayday_timer);
-	spin_lock_irq(&pool->lock);
+	raw_spin_lock_irq(&pool->lock);
 	/*
 	 * This is necessary even after a new worker was just successfully
 	 * created as @pool->lock was dropped and the new worker might have
@@ -2052,7 +2004,7 @@ __acquires(&pool->lock)
  * and may_start_working() is true.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock) which may be released and regrabbed
+ * raw_spin_lock_irq(pool->lock) which may be released and regrabbed
  * multiple times.  Does GFP_KERNEL allocations.
  *
  * Return:
@@ -2075,7 +2027,7 @@ static bool manage_workers(struct worker *worker)
 
 	pool->manager = NULL;
 	pool->flags &= ~POOL_MANAGER_ACTIVE;
-	wake_up(&wq_manager_wait);
+	swake_up_one(&wq_manager_wait);
 	return true;
 }
 
@@ -2091,7 +2043,7 @@ static bool manage_workers(struct worker *worker)
  * call this function to process a work.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock) which is released and regrabbed.
+ * raw_spin_lock_irq(pool->lock) which is released and regrabbed.
  */
 static void process_one_work(struct worker *worker, struct work_struct *work)
 __releases(&pool->lock)
@@ -2173,7 +2125,7 @@ __acquires(&pool->lock)
 	 */
 	set_work_pool_and_clear_pending(work, pool->id);
 
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 
 	lock_map_acquire(&pwq->wq->lockdep_map);
 	lock_map_acquire(&lockdep_map);
@@ -2228,7 +2180,7 @@ __acquires(&pool->lock)
 	 */
 	cond_resched();
 
-	spin_lock_irq(&pool->lock);
+	raw_spin_lock_irq(&pool->lock);
 
 	/* clear cpu intensive status */
 	if (unlikely(cpu_intensive))
@@ -2251,7 +2203,7 @@ __acquires(&pool->lock)
  * fetches a work from the top and executes it.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock) which may be released and regrabbed
+ * raw_spin_lock_irq(pool->lock) which may be released and regrabbed
  * multiple times.
  */
 static void process_scheduled_works(struct worker *worker)
@@ -2293,11 +2245,11 @@ static int worker_thread(void *__worker)
 	/* tell the scheduler that this is a workqueue worker */
 	set_pf_worker(true);
 woke_up:
-	spin_lock_irq(&pool->lock);
+	raw_spin_lock_irq(&pool->lock);
 
 	/* am I supposed to die? */
 	if (unlikely(worker->flags & WORKER_DIE)) {
-		spin_unlock_irq(&pool->lock);
+		raw_spin_unlock_irq(&pool->lock);
 		WARN_ON_ONCE(!list_empty(&worker->entry));
 		set_pf_worker(false);
 
@@ -2363,7 +2315,7 @@ static int worker_thread(void *__worker)
 	 */
 	worker_enter_idle(worker);
 	__set_current_state(TASK_IDLE);
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 	schedule();
 	goto woke_up;
 }
@@ -2417,7 +2369,7 @@ static int rescuer_thread(void *__rescuer)
 	should_stop = kthread_should_stop();
 
 	/* see whether any pwq is asking for help */
-	spin_lock_irq(&wq_mayday_lock);
+	raw_spin_lock_irq(&wq_mayday_lock);
 
 	while (!list_empty(&wq->maydays)) {
 		struct pool_workqueue *pwq = list_first_entry(&wq->maydays,
@@ -2429,11 +2381,11 @@ static int rescuer_thread(void *__rescuer)
 		__set_current_state(TASK_RUNNING);
 		list_del_init(&pwq->mayday_node);
 
-		spin_unlock_irq(&wq_mayday_lock);
+		raw_spin_unlock_irq(&wq_mayday_lock);
 
 		worker_attach_to_pool(rescuer, pool);
 
-		spin_lock_irq(&pool->lock);
+		raw_spin_lock_irq(&pool->lock);
 
 		/*
 		 * Slurp in all works issued via this workqueue and
@@ -2462,7 +2414,7 @@ static int rescuer_thread(void *__rescuer)
 			 * incur MAYDAY_INTERVAL delay inbetween.
 			 */
 			if (need_to_create_worker(pool)) {
-				spin_lock(&wq_mayday_lock);
+				raw_spin_lock(&wq_mayday_lock);
 				/*
 				 * Queue iff we aren't racing destruction
 				 * and somebody else hasn't queued it already.
@@ -2471,7 +2423,7 @@ static int rescuer_thread(void *__rescuer)
 					get_pwq(pwq);
 					list_add_tail(&pwq->mayday_node, &wq->maydays);
 				}
-				spin_unlock(&wq_mayday_lock);
+				raw_spin_unlock(&wq_mayday_lock);
 			}
 		}
 
@@ -2489,14 +2441,14 @@ static int rescuer_thread(void *__rescuer)
 		if (need_more_worker(pool))
 			wake_up_worker(pool);
 
-		spin_unlock_irq(&pool->lock);
+		raw_spin_unlock_irq(&pool->lock);
 
 		worker_detach_from_pool(rescuer);
 
-		spin_lock_irq(&wq_mayday_lock);
+		raw_spin_lock_irq(&wq_mayday_lock);
 	}
 
-	spin_unlock_irq(&wq_mayday_lock);
+	raw_spin_unlock_irq(&wq_mayday_lock);
 
 	if (should_stop) {
 		__set_current_state(TASK_RUNNING);
@@ -2576,7 +2528,7 @@ static void wq_barrier_func(struct work_struct *work)
  * underneath us, so we can't reliably determine pwq from @target.
  *
  * CONTEXT:
- * spin_lock_irq(pool->lock).
+ * raw_spin_lock_irq(pool->lock).
  */
 static void insert_wq_barrier(struct pool_workqueue *pwq,
 			      struct wq_barrier *barr,
@@ -2663,7 +2615,7 @@ static bool flush_workqueue_prep_pwqs(struct workqueue_struct *wq,
 	for_each_pwq(pwq, wq) {
 		struct worker_pool *pool = pwq->pool;
 
-		spin_lock_irq(&pool->lock);
+		raw_spin_lock_irq(&pool->lock);
 
 		if (flush_color >= 0) {
 			WARN_ON_ONCE(pwq->flush_color != -1);
@@ -2680,7 +2632,7 @@ static bool flush_workqueue_prep_pwqs(struct workqueue_struct *wq,
 			pwq->work_color = work_color;
 		}
 
-		spin_unlock_irq(&pool->lock);
+		raw_spin_unlock_irq(&pool->lock);
 	}
 
 	if (flush_color >= 0 && atomic_dec_and_test(&wq->nr_pwqs_to_flush))
@@ -2880,9 +2832,9 @@ void drain_workqueue(struct workqueue_struct *wq)
 	for_each_pwq(pwq, wq) {
 		bool drained;
 
-		spin_lock_irq(&pwq->pool->lock);
+		raw_spin_lock_irq(&pwq->pool->lock);
 		drained = !pwq->nr_active && list_empty(&pwq->delayed_works);
-		spin_unlock_irq(&pwq->pool->lock);
+		raw_spin_unlock_irq(&pwq->pool->lock);
 
 		if (drained)
 			continue;
@@ -2918,7 +2870,7 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr,
 		return false;
 	}
 
-	spin_lock_irq(&pool->lock);
+	raw_spin_lock_irq(&pool->lock);
 	/* see the comment in try_to_grab_pending() with the same code */
 	pwq = get_work_pwq(work);
 	if (pwq) {
@@ -2934,7 +2886,7 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr,
 	check_flush_dependency(pwq->wq, work);
 
 	insert_wq_barrier(pwq, barr, work, worker);
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 
 	/*
 	 * Force a lock recursion deadlock when using flush_work() inside a
@@ -2953,7 +2905,7 @@ static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr,
 	rcu_read_unlock();
 	return true;
 already_gone:
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 	rcu_read_unlock();
 	return false;
 }
@@ -3054,7 +3006,7 @@ static bool __cancel_work_timer(struct work_struct *work, bool is_dwork)
 
 	/* tell other tasks trying to grab @work to back off */
 	mark_work_canceling(work);
-	local_unlock_irqrestore(pendingb_lock, flags);
+	local_irq_restore(flags);
 
 	/*
 	 * This allows canceling during early boot.  We know that @work
@@ -3115,10 +3067,10 @@ EXPORT_SYMBOL_GPL(cancel_work_sync);
  */
 bool flush_delayed_work(struct delayed_work *dwork)
 {
-	local_lock_irq(pendingb_lock);
+	local_irq_disable();
 	if (del_timer_sync(&dwork->timer))
 		__queue_work(dwork->cpu, dwork->wq, &dwork->work);
-	local_unlock_irq(pendingb_lock);
+	local_irq_enable();
 	return flush_work(&dwork->work);
 }
 EXPORT_SYMBOL(flush_delayed_work);
@@ -3156,7 +3108,7 @@ static bool __cancel_work(struct work_struct *work, bool is_dwork)
 		return false;
 
 	set_work_pool_and_clear_pending(work, get_work_pool_id(work));
-	local_unlock_irqrestore(pendingb_lock, flags);
+	local_irq_restore(flags);
 	return ret;
 }
 
@@ -3266,7 +3218,7 @@ EXPORT_SYMBOL_GPL(execute_in_process_context);
  *
  * Undo alloc_workqueue_attrs().
  */
-void free_workqueue_attrs(struct workqueue_attrs *attrs)
+static void free_workqueue_attrs(struct workqueue_attrs *attrs)
 {
 	if (attrs) {
 		free_cpumask_var(attrs->cpumask);
@@ -3276,21 +3228,20 @@ void free_workqueue_attrs(struct workqueue_attrs *attrs)
 
 /**
  * alloc_workqueue_attrs - allocate a workqueue_attrs
- * @gfp_mask: allocation mask to use
  *
  * Allocate a new workqueue_attrs, initialize with default settings and
  * return it.
  *
  * Return: The allocated new workqueue_attr on success. %NULL on failure.
  */
-struct workqueue_attrs *alloc_workqueue_attrs(gfp_t gfp_mask)
+static struct workqueue_attrs *alloc_workqueue_attrs(void)
 {
 	struct workqueue_attrs *attrs;
 
-	attrs = kzalloc(sizeof(*attrs), gfp_mask);
+	attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
 	if (!attrs)
 		goto fail;
-	if (!alloc_cpumask_var(&attrs->cpumask, gfp_mask))
+	if (!alloc_cpumask_var(&attrs->cpumask, GFP_KERNEL))
 		goto fail;
 
 	cpumask_copy(attrs->cpumask, cpu_possible_mask);
@@ -3347,7 +3298,7 @@ static bool wqattrs_equal(const struct workqueue_attrs *a,
  */
 static int init_worker_pool(struct worker_pool *pool)
 {
-	spin_lock_init(&pool->lock);
+	raw_spin_lock_init(&pool->lock);
 	pool->id = -1;
 	pool->cpu = -1;
 	pool->node = NUMA_NO_NODE;
@@ -3368,7 +3319,7 @@ static int init_worker_pool(struct worker_pool *pool)
 	pool->refcnt = 1;
 
 	/* shouldn't fail above this point */
-	pool->attrs = alloc_workqueue_attrs(GFP_KERNEL);
+	pool->attrs = alloc_workqueue_attrs();
 	if (!pool->attrs)
 		return -ENOMEM;
 	return 0;
@@ -3433,15 +3384,15 @@ static void put_unbound_pool(struct worker_pool *pool)
 	 * @pool's workers from blocking on attach_mutex.  We're the last
 	 * manager and @pool gets freed with the flag set.
 	 */
-	spin_lock_irq(&pool->lock);
-	wait_event_lock_irq(wq_manager_wait,
+	raw_spin_lock_irq(&pool->lock);
+	swait_event_lock_irq(wq_manager_wait,
 			    !(pool->flags & POOL_MANAGER_ACTIVE), pool->lock);
 	pool->flags |= POOL_MANAGER_ACTIVE;
 
 	while ((worker = first_idle_worker(pool)))
 		destroy_worker(worker);
 	WARN_ON(pool->nr_workers || pool->nr_idle);
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 
 	mutex_lock(&wq_pool_attach_mutex);
 	if (!list_empty(&pool->workers))
@@ -3595,7 +3546,7 @@ static void pwq_adjust_max_active(struct pool_workqueue *pwq)
 		return;
 
 	/* this function can be called during early boot w/ irq disabled */
-	spin_lock_irqsave(&pwq->pool->lock, flags);
+	raw_spin_lock_irqsave(&pwq->pool->lock, flags);
 
 	/*
 	 * During [un]freezing, the caller is responsible for ensuring that
@@ -3618,7 +3569,7 @@ static void pwq_adjust_max_active(struct pool_workqueue *pwq)
 		pwq->max_active = 0;
 	}
 
-	spin_unlock_irqrestore(&pwq->pool->lock, flags);
+	raw_spin_unlock_irqrestore(&pwq->pool->lock, flags);
 }
 
 /* initialize newly alloced @pwq which is associated with @wq and @pool */
@@ -3791,8 +3742,8 @@ apply_wqattrs_prepare(struct workqueue_struct *wq,
 
 	ctx = kzalloc(struct_size(ctx, pwq_tbl, nr_node_ids), GFP_KERNEL);
 
-	new_attrs = alloc_workqueue_attrs(GFP_KERNEL);
-	tmp_attrs = alloc_workqueue_attrs(GFP_KERNEL);
+	new_attrs = alloc_workqueue_attrs();
+	tmp_attrs = alloc_workqueue_attrs();
 	if (!ctx || !new_attrs || !tmp_attrs)
 		goto out_free;
 
@@ -3928,7 +3879,7 @@ static int apply_workqueue_attrs_locked(struct workqueue_struct *wq,
  *
  * Return: 0 on success and -errno on failure.
  */
-int apply_workqueue_attrs(struct workqueue_struct *wq,
+static int apply_workqueue_attrs(struct workqueue_struct *wq,
 			  const struct workqueue_attrs *attrs)
 {
 	int ret;
@@ -3939,7 +3890,6 @@ int apply_workqueue_attrs(struct workqueue_struct *wq,
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(apply_workqueue_attrs);
 
 /**
  * wq_update_unbound_numa - update NUMA affinity of a wq for CPU hot[un]plug
@@ -4017,9 +3967,9 @@ static void wq_update_unbound_numa(struct workqueue_struct *wq, int cpu,
 
 use_dfl_pwq:
 	mutex_lock(&wq->mutex);
-	spin_lock_irq(&wq->dfl_pwq->pool->lock);
+	raw_spin_lock_irq(&wq->dfl_pwq->pool->lock);
 	get_pwq(wq->dfl_pwq);
-	spin_unlock_irq(&wq->dfl_pwq->pool->lock);
+	raw_spin_unlock_irq(&wq->dfl_pwq->pool->lock);
 	old_pwq = numa_pwq_tbl_install(wq, node, wq->dfl_pwq);
 out_unlock:
 	mutex_unlock(&wq->mutex);
@@ -4138,7 +4088,7 @@ struct workqueue_struct *__alloc_workqueue_key(const char *fmt,
 		return NULL;
 
 	if (flags & WQ_UNBOUND) {
-		wq->unbound_attrs = alloc_workqueue_attrs(GFP_KERNEL);
+		wq->unbound_attrs = alloc_workqueue_attrs();
 		if (!wq->unbound_attrs)
 			goto err_free_wq;
 	}
@@ -4225,9 +4175,9 @@ void destroy_workqueue(struct workqueue_struct *wq)
 		struct worker *rescuer = wq->rescuer;
 
 		/* this prevents new queueing */
-		spin_lock_irq(&wq_mayday_lock);
+		raw_spin_lock_irq(&wq_mayday_lock);
 		wq->rescuer = NULL;
-		spin_unlock_irq(&wq_mayday_lock);
+		raw_spin_unlock_irq(&wq_mayday_lock);
 
 		/* rescuer will empty maydays list before exiting */
 		kthread_stop(rescuer->task);
@@ -4422,10 +4372,10 @@ unsigned int work_busy(struct work_struct *work)
 	rcu_read_lock();
 	pool = get_work_pool(work);
 	if (pool) {
-		spin_lock_irqsave(&pool->lock, flags);
+		raw_spin_lock_irqsave(&pool->lock, flags);
 		if (find_worker_executing_work(pool, work))
 			ret |= WORK_BUSY_RUNNING;
-		spin_unlock_irqrestore(&pool->lock, flags);
+		raw_spin_unlock_irqrestore(&pool->lock, flags);
 	}
 	rcu_read_unlock();
 
@@ -4632,10 +4582,10 @@ void show_workqueue_state(void)
 		pr_info("workqueue %s: flags=0x%x\n", wq->name, wq->flags);
 
 		for_each_pwq(pwq, wq) {
-			spin_lock_irqsave(&pwq->pool->lock, flags);
+			raw_spin_lock_irqsave(&pwq->pool->lock, flags);
 			if (pwq->nr_active || !list_empty(&pwq->delayed_works))
 				show_pwq(pwq);
-			spin_unlock_irqrestore(&pwq->pool->lock, flags);
+			raw_spin_unlock_irqrestore(&pwq->pool->lock, flags);
 			/*
 			 * We could be printing a lot from atomic context, e.g.
 			 * sysrq-t -> show_workqueue_state(). Avoid triggering
@@ -4649,7 +4599,7 @@ void show_workqueue_state(void)
 		struct worker *worker;
 		bool first = true;
 
-		spin_lock_irqsave(&pool->lock, flags);
+		raw_spin_lock_irqsave(&pool->lock, flags);
 		if (pool->nr_workers == pool->nr_idle)
 			goto next_pool;
 
@@ -4668,7 +4618,7 @@ void show_workqueue_state(void)
 		}
 		pr_cont("\n");
 	next_pool:
-		spin_unlock_irqrestore(&pool->lock, flags);
+		raw_spin_unlock_irqrestore(&pool->lock, flags);
 		/*
 		 * We could be printing a lot from atomic context, e.g.
 		 * sysrq-t -> show_workqueue_state(). Avoid triggering
@@ -4698,7 +4648,7 @@ void wq_worker_comm(char *buf, size_t size, struct task_struct *task)
 		struct worker_pool *pool = worker->pool;
 
 		if (pool) {
-			spin_lock_irq(&pool->lock);
+			raw_spin_lock_irq(&pool->lock);
 			/*
 			 * ->desc tracks information (wq name or
 			 * set_worker_desc()) for the latest execution.  If
@@ -4712,7 +4662,7 @@ void wq_worker_comm(char *buf, size_t size, struct task_struct *task)
 					scnprintf(buf + off, size - off, "-%s",
 						  worker->desc);
 			}
-			spin_unlock_irq(&pool->lock);
+			raw_spin_unlock_irq(&pool->lock);
 		}
 	}
 
@@ -4743,7 +4693,7 @@ static void unbind_workers(int cpu)
 
 	for_each_cpu_worker_pool(pool, cpu) {
 		mutex_lock(&wq_pool_attach_mutex);
-		spin_lock_irq(&pool->lock);
+		raw_spin_lock_irq(&pool->lock);
 
 		/*
 		 * We've blocked all attach/detach operations. Make all workers
@@ -4757,7 +4707,7 @@ static void unbind_workers(int cpu)
 
 		pool->flags |= POOL_DISASSOCIATED;
 
-		spin_unlock_irq(&pool->lock);
+		raw_spin_unlock_irq(&pool->lock);
 		mutex_unlock(&wq_pool_attach_mutex);
 
 		/*
@@ -4783,9 +4733,9 @@ static void unbind_workers(int cpu)
 		 * worker blocking could lead to lengthy stalls.  Kick off
 		 * unbound chain execution of currently pending work items.
 		 */
-		spin_lock_irq(&pool->lock);
+		raw_spin_lock_irq(&pool->lock);
 		wake_up_worker(pool);
-		spin_unlock_irq(&pool->lock);
+		raw_spin_unlock_irq(&pool->lock);
 	}
 }
 
@@ -4812,7 +4762,7 @@ static void rebind_workers(struct worker_pool *pool)
 		WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task,
 						  pool->attrs->cpumask) < 0);
 
-	spin_lock_irq(&pool->lock);
+	raw_spin_lock_irq(&pool->lock);
 
 	pool->flags &= ~POOL_DISASSOCIATED;
 
@@ -4851,7 +4801,7 @@ static void rebind_workers(struct worker_pool *pool)
 		WRITE_ONCE(worker->flags, worker_flags);
 	}
 
-	spin_unlock_irq(&pool->lock);
+	raw_spin_unlock_irq(&pool->lock);
 }
 
 /**
@@ -5303,7 +5253,7 @@ static struct workqueue_attrs *wq_sysfs_prep_attrs(struct workqueue_struct *wq)
 
 	lockdep_assert_held(&wq_pool_mutex);
 
-	attrs = alloc_workqueue_attrs(GFP_KERNEL);
+	attrs = alloc_workqueue_attrs();
 	if (!attrs)
 		return NULL;
 
@@ -5725,7 +5675,7 @@ static void __init wq_numa_init(void)
 		return;
 	}
 
-	wq_update_unbound_numa_attrs_buf = alloc_workqueue_attrs(GFP_KERNEL);
+	wq_update_unbound_numa_attrs_buf = alloc_workqueue_attrs();
 	BUG_ON(!wq_update_unbound_numa_attrs_buf);
 
 	/*
@@ -5800,7 +5750,7 @@ int __init workqueue_init_early(void)
 	for (i = 0; i < NR_STD_WORKER_POOLS; i++) {
 		struct workqueue_attrs *attrs;
 
-		BUG_ON(!(attrs = alloc_workqueue_attrs(GFP_KERNEL)));
+		BUG_ON(!(attrs = alloc_workqueue_attrs()));
 		attrs->nice = std_nice[i];
 		unbound_std_wq_attrs[i] = attrs;
 
@@ -5809,7 +5759,7 @@ int __init workqueue_init_early(void)
 		 * guaranteed by max_active which is enforced by pwqs.
 		 * Turn off NUMA so that dfl_pwq is used for all nodes.
 		 */
-		BUG_ON(!(attrs = alloc_workqueue_attrs(GFP_KERNEL)));
+		BUG_ON(!(attrs = alloc_workqueue_attrs()));
 		attrs->nice = std_nice[i];
 		attrs->no_numa = true;
 		ordered_wq_attrs[i] = attrs;
-- 
2.17.1