Merge android11-5.4.61+ (e0b1644) into msm-5.4

* refs/heads/tmp-e0b1644:
  BACKPORT: dmabuf: fix NULL pointer dereference in dma_buf_release()
  ANDROID: mm/memblock: export memblock_end_of_DRAM
  ANDROID: ABI: Update allowed list for QCOM
  ANDROID: x86: configs: gki: add missing CONFIG_BLK_CGROUP
  ANDROID: ABI: Update allowed list for QCOM
  ANDROID: kthread: break dependency between worker->lock and task_struct->pi_lock

Change-Id: Ia1e6fdce120a69891dad59858a1207211f05fbe7
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

android/GKI_VERSION

@@ -1 +1 @@
-LTS_5.4.61_9c7cbdf8b4cf
+LTS_5.4.61_e0b1644a472e

android/abi_gki_aarch64_qcom

@@ -1468,6 +1468,7 @@
   netlink_unicast
   net_ratelimit
   new_inode
+  nf_conntrack_destroy
   nla_memcpy
   __nla_parse
   nla_put_64bit
@@ -1665,6 +1666,7 @@
   pci_walk_bus
   pci_write_config_dword
   pci_write_config_word
+  pci_dev_present
   PDE_DATA
   __per_cpu_offset
   perf_trace_buf_alloc

arch/x86/configs/gki_defconfig

@@ -19,6 +19,7 @@ CONFIG_UCLAMP_TASK=y
 CONFIG_CGROUPS=y
 CONFIG_MEMCG=y
 CONFIG_MEMCG_SWAP=y
+CONFIG_BLK_CGROUP=y
 CONFIG_CGROUP_SCHED=y
 # CONFIG_FAIR_GROUP_SCHED is not set
 CONFIG_UCLAMP_TASK_GROUP=y

drivers/dma-buf/dma-buf.c

@@ -84,8 +84,7 @@ static void dma_buf_release(struct dentry *dentry)
 	int dtor_ret = 0;
 
 	dmabuf = dentry->d_fsdata;
-
-	if (!dmabuf)
+	if (unlikely(!dmabuf))
 		return;
 
 	msm_dma_buf = to_msm_dma_buf(dmabuf);

kernel/kthread.c

@@ -9,6 +9,7 @@
 #include <uapi/linux/sched/types.h>
 #include <linux/sched.h>
 #include <linux/sched/task.h>
+#include <linux/sched/wake_q.h>
 #include <linux/kthread.h>
 #include <linux/completion.h>
 #include <linux/err.h>
@@ -806,14 +807,15 @@ static void kthread_insert_work_sanity_check(struct kthread_worker *worker,
 /* insert @work before @pos in @worker */
 static void kthread_insert_work(struct kthread_worker *worker,
 				struct kthread_work *work,
-				struct list_head *pos)
+				struct list_head *pos,
+				struct wake_q_head *wake_q)
 {
 	kthread_insert_work_sanity_check(worker, work);
 
 	list_add_tail(&work->node, pos);
 	work->worker = worker;
 	if (!worker->current_work && likely(worker->task))
-		wake_up_process(worker->task);
+		wake_q_add(wake_q, worker->task);
 }
 
 /**
@@ -831,15 +833,19 @@ static void kthread_insert_work(struct kthread_worker *worker,
 bool kthread_queue_work(struct kthread_worker *worker,
 			struct kthread_work *work)
 {
-	bool ret = false;
+	DEFINE_WAKE_Q(wake_q);
 	unsigned long flags;
+	bool ret = false;
 
 	raw_spin_lock_irqsave(&worker->lock, flags);
 	if (!queuing_blocked(worker, work)) {
-		kthread_insert_work(worker, work, &worker->work_list);
+		kthread_insert_work(worker, work, &worker->work_list, &wake_q);
 		ret = true;
 	}
 	raw_spin_unlock_irqrestore(&worker->lock, flags);
+
+	wake_up_q(&wake_q);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(kthread_queue_work);
@@ -857,6 +863,7 @@ void kthread_delayed_work_timer_fn(struct timer_list *t)
 	struct kthread_delayed_work *dwork = from_timer(dwork, t, timer);
 	struct kthread_work *work = &dwork->work;
 	struct kthread_worker *worker = work->worker;
+	DEFINE_WAKE_Q(wake_q);
 	unsigned long flags;
 
 	/*
@@ -873,15 +880,18 @@ void kthread_delayed_work_timer_fn(struct timer_list *t)
 	/* Move the work from worker->delayed_work_list. */
 	WARN_ON_ONCE(list_empty(&work->node));
 	list_del_init(&work->node);
-	kthread_insert_work(worker, work, &worker->work_list);
+	kthread_insert_work(worker, work, &worker->work_list, &wake_q);
 
 	raw_spin_unlock_irqrestore(&worker->lock, flags);
+
+	wake_up_q(&wake_q);
 }
 EXPORT_SYMBOL(kthread_delayed_work_timer_fn);
 
 static void __kthread_queue_delayed_work(struct kthread_worker *worker,
 					 struct kthread_delayed_work *dwork,
-					 unsigned long delay)
+					 unsigned long delay,
+					 struct wake_q_head *wake_q)
 {
 	struct timer_list *timer = &dwork->timer;
 	struct kthread_work *work = &dwork->work;
@@ -897,7 +907,7 @@ static void __kthread_queue_delayed_work(struct kthread_worker *worker,
 	 * on that there's no such delay when @delay is 0.
 	 */
 	if (!delay) {
-		kthread_insert_work(worker, work, &worker->work_list);
+		kthread_insert_work(worker, work, &worker->work_list, wake_q);
 		return;
 	}
 
@@ -930,17 +940,21 @@ bool kthread_queue_delayed_work(struct kthread_worker *worker,
 				unsigned long delay)
 {
 	struct kthread_work *work = &dwork->work;
+	DEFINE_WAKE_Q(wake_q);
 	unsigned long flags;
 	bool ret = false;
 
 	raw_spin_lock_irqsave(&worker->lock, flags);
 
 	if (!queuing_blocked(worker, work)) {
-		__kthread_queue_delayed_work(worker, dwork, delay);
+		__kthread_queue_delayed_work(worker, dwork, delay, &wake_q);
 		ret = true;
 	}
 
 	raw_spin_unlock_irqrestore(&worker->lock, flags);
+
+	wake_up_q(&wake_q);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(kthread_queue_delayed_work);
@@ -969,6 +983,7 @@ void kthread_flush_work(struct kthread_work *work)
 		KTHREAD_WORK_INIT(fwork.work, kthread_flush_work_fn),
 		COMPLETION_INITIALIZER_ONSTACK(fwork.done),
 	};
+	DEFINE_WAKE_Q(wake_q);
 	struct kthread_worker *worker;
 	bool noop = false;
 
@@ -981,15 +996,18 @@ void kthread_flush_work(struct kthread_work *work)
 	WARN_ON_ONCE(work->worker != worker);
 
 	if (!list_empty(&work->node))
-		kthread_insert_work(worker, &fwork.work, work->node.next);
+		kthread_insert_work(worker, &fwork.work,
+				    work->node.next, &wake_q);
 	else if (worker->current_work == work)
 		kthread_insert_work(worker, &fwork.work,
-				    worker->work_list.next);
+				    worker->work_list.next, &wake_q);
 	else
 		noop = true;
 
 	raw_spin_unlock_irq(&worker->lock);
 
+	wake_up_q(&wake_q);
+
 	if (!noop)
 		wait_for_completion(&fwork.done);
 }
@@ -1067,6 +1085,7 @@ bool kthread_mod_delayed_work(struct kthread_worker *worker,
 			      unsigned long delay)
 {
 	struct kthread_work *work = &dwork->work;
+	DEFINE_WAKE_Q(wake_q);
 	unsigned long flags;
 	int ret = false;
 
@@ -1085,9 +1104,12 @@ bool kthread_mod_delayed_work(struct kthread_worker *worker,
 
 	ret = __kthread_cancel_work(work, true, &flags);
 fast_queue:
-	__kthread_queue_delayed_work(worker, dwork, delay);
+	__kthread_queue_delayed_work(worker, dwork, delay, &wake_q);
 out:
 	raw_spin_unlock_irqrestore(&worker->lock, flags);
+
+	wake_up_q(&wake_q);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(kthread_mod_delayed_work);

mm/memblock.c

@@ -1630,6 +1630,7 @@ phys_addr_t __init_memblock memblock_end_of_DRAM(void)
 
 	return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size);
 }
+EXPORT_SYMBOL_GPL(memblock_end_of_DRAM);
 
 static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit)
 {