Merge 4.19.105 into android-4.19

Changes in 4.19.105
	Input: synaptics - switch T470s to RMI4 by default
	Input: synaptics - enable SMBus on ThinkPad L470
	Input: synaptics - remove the LEN0049 dmi id from topbuttonpad list
	ALSA: usb-audio: Fix UAC2/3 effect unit parsing
	ALSA: hda/realtek - Fix silent output on MSI-GL73
	ALSA: usb-audio: Apply sample rate quirk for Audioengine D1
	arm64: cpufeature: Set the FP/SIMD compat HWCAP bits properly
	arm64: nofpsmid: Handle TIF_FOREIGN_FPSTATE flag cleanly
	ALSA: usb-audio: sound: usb: usb true/false for bool return type
	ALSA: usb-audio: Add clock validity quirk for Denon MC7000/MCX8000
	ext4: don't assume that mmp_nodename/bdevname have NUL
	ext4: fix support for inode sizes > 1024 bytes
	ext4: fix checksum errors with indexed dirs
	ext4: add cond_resched() to ext4_protect_reserved_inode
	ext4: improve explanation of a mount failure caused by a misconfigured kernel
	Btrfs: fix race between using extent maps and merging them
	btrfs: ref-verify: fix memory leaks
	btrfs: print message when tree-log replay starts
	btrfs: log message when rw remount is attempted with unclean tree-log
	ARM: npcm: Bring back GPIOLIB support
	arm64: ssbs: Fix context-switch when SSBS is present on all CPUs
	KVM: nVMX: Use correct root level for nested EPT shadow page tables
	perf/x86/amd: Add missing L2 misses event spec to AMD Family 17h's event map
	nvme: fix the parameter order for nvme_get_log in nvme_get_fw_slot_info
	IB/hfi1: Acquire lock to release TID entries when user file is closed
	IB/hfi1: Close window for pq and request coliding
	IB/rdmavt: Reset all QPs when the device is shut down
	RDMA/core: Fix invalid memory access in spec_filter_size
	RDMA/hfi1: Fix memory leak in _dev_comp_vect_mappings_create
	RDMA/rxe: Fix soft lockup problem due to using tasklets in softirq
	RDMA/core: Fix protection fault in get_pkey_idx_qp_list
	s390/time: Fix clk type in get_tod_clock
	perf/x86/intel: Fix inaccurate period in context switch for auto-reload
	hwmon: (pmbus/ltc2978) Fix PMBus polling of MFR_COMMON definitions.
	NFSv4.1 make cachethis=no for writes
	jbd2: move the clearing of b_modified flag to the journal_unmap_buffer()
	jbd2: do not clear the BH_Mapped flag when forgetting a metadata buffer
	KVM: x86/mmu: Fix struct guest_walker arrays for 5-level paging
	Linux 4.19.105

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I411bf0e21a24cee878f1a114175090e8fe69be46

arch/arm64/kernel/process.c

@@ -424,6 +424,13 @@ static void ssbs_thread_switch(struct task_struct *next)
 	if (unlikely(next->flags & PF_KTHREAD))
 		return;
 
+	/*
+	 * If all CPUs implement the SSBS extension, then we just need to
+	 * context-switch the PSTATE field.
+	 */
+	if (cpu_have_feature(cpu_feature(SSBS)))
+		return;
+
 	/* If the mitigation is enabled, then we leave SSBS clear. */
 	if ((arm64_get_ssbd_state() == ARM64_SSBD_FORCE_ENABLE) ||
 	    test_tsk_thread_flag(next, TIF_SSBD))