This is the 5.4.96 stable release

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Merge 5.4.96 into android11-5.4-lts

Changes in 5.4.96
	net: dsa: bcm_sf2: put device node before return
	net: switchdev: don't set port_obj_info->handled true when -EOPNOTSUPP
	ibmvnic: Ensure that CRQ entry read are correctly ordered
	Revert "Revert "block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT""
	ACPI: thermal: Do not call acpi_thermal_check() directly
	arm64: Fix kernel address detection of __is_lm_address()
	arm64: Do not pass tagged addresses to __is_lm_address()
	tcp: make TCP_USER_TIMEOUT accurate for zero window probes
	btrfs: backref, only collect file extent items matching backref offset
	btrfs: backref, don't add refs from shared block when resolving normal backref
	btrfs: backref, only search backref entries from leaves of the same root
	btrfs: backref, use correct count to resolve normal data refs
	net_sched: gen_estimator: support large ewma log
	phy: cpcap-usb: Fix warning for missing regulator_disable
	platform/x86: touchscreen_dmi: Add swap-x-y quirk for Goodix touchscreen on Estar Beauty HD tablet
	platform/x86: intel-vbtn: Support for tablet mode on Dell Inspiron 7352
	x86: __always_inline __{rd,wr}msr()
	scsi: scsi_transport_srp: Don't block target in failfast state
	scsi: libfc: Avoid invoking response handler twice if ep is already completed
	scsi: fnic: Fix memleak in vnic_dev_init_devcmd2
	ASoC: SOF: Intel: hda: Resume codec to do jack detection
	mac80211: fix fast-rx encryption check
	scsi: ibmvfc: Set default timeout to avoid crash during migration
	ALSA: hda: Add Cometlake-R PCI ID
	udf: fix the problem that the disc content is not displayed
	nvme: check the PRINFO bit before deciding the host buffer length
	selftests/powerpc: Only test lwm/stmw on big endian
	drm/amd/display: Update dram_clock_change_latency for DCN2.1
	drm/amd/display: Change function decide_dp_link_settings to avoid infinite looping
	objtool: Don't fail on missing symbol table
	kthread: Extract KTHREAD_IS_PER_CPU
	workqueue: Restrict affinity change to rescuer
	Linux 5.4.96

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ib235d179dcd1050a5268dd9a3b61db62a6cb9889

kernel/kthread.c

@@ -470,11 +470,36 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data),
 		return p;
 	kthread_bind(p, cpu);
 	/* CPU hotplug need to bind once again when unparking the thread. */
-	set_bit(KTHREAD_IS_PER_CPU, &to_kthread(p)->flags);
 	to_kthread(p)->cpu = cpu;
 	return p;
 }
 
+void kthread_set_per_cpu(struct task_struct *k, int cpu)
+{
+	struct kthread *kthread = to_kthread(k);
+	if (!kthread)
+		return;
+
+	WARN_ON_ONCE(!(k->flags & PF_NO_SETAFFINITY));
+
+	if (cpu < 0) {
+		clear_bit(KTHREAD_IS_PER_CPU, &kthread->flags);
+		return;
+	}
+
+	kthread->cpu = cpu;
+	set_bit(KTHREAD_IS_PER_CPU, &kthread->flags);
+}
+
+bool kthread_is_per_cpu(struct task_struct *k)
+{
+	struct kthread *kthread = to_kthread(k);
+	if (!kthread)
+		return false;
+
+	return test_bit(KTHREAD_IS_PER_CPU, &kthread->flags);
+}
+
 /**
  * kthread_unpark - unpark a thread created by kthread_create().
  * @k:		thread created by kthread_create().