This is the 4.9.154 stable release

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Merge 4.9.154 into android-4.9

Changes in 4.9.154
	net: bridge: Fix ethernet header pointer before check skb forwardable
	net: Fix usage of pskb_trim_rcsum
	openvswitch: Avoid OOB read when parsing flow nlattrs
	vhost: log dirty page correctly
	net: ipv4: Fix memory leak in network namespace dismantle
	net_sched: refetch skb protocol for each filter
	ipfrag: really prevent allocation on netns exit
	USB: serial: simple: add Motorola Tetra TPG2200 device id
	USB: serial: pl2303: add new PID to support PL2303TB
	ASoC: atom: fix a missing check of snd_pcm_lib_malloc_pages
	ASoC: rt5514-spi: Fix potential NULL pointer dereference
	ARCv2: lib: memeset: fix doing prefetchw outside of buffer
	ARC: perf: map generic branches to correct hardware condition
	s390/early: improve machine detection
	s390/smp: fix CPU hotplug deadlock with CPU rescan
	char/mwave: fix potential Spectre v1 vulnerability
	staging: rtl8188eu: Add device code for D-Link DWA-121 rev B1
	tty: Handle problem if line discipline does not have receive_buf
	uart: Fix crash in uart_write and uart_put_char
	tty/n_hdlc: fix __might_sleep warning
	CIFS: Fix possible hang during async MTU reads and writes
	Input: xpad - add support for SteelSeries Stratus Duo
	compiler.h: enable builtin overflow checkers and add fallback code
	Input: uinput - fix undefined behavior in uinput_validate_absinfo()
	acpi/nfit: Block function zero DSMs
	acpi/nfit: Fix command-supported detection
	dm thin: fix passdown_double_checking_shared_status()
	KVM: x86: Fix single-step debugging
	x86/selftests/pkeys: Fork() to check for state being preserved
	x86/kaslr: Fix incorrect i8254 outb() parameters
	can: dev: __can_get_echo_skb(): fix bogous check for non-existing skb by removing it
	can: bcm: check timer values before ktime conversion
	vt: invoke notifier on screen size change
	perf unwind: Unwind with libdw doesn't take symfs into account
	perf unwind: Take pgoff into account when reporting elf to libdwfl
	irqchip/gic-v3-its: Align PCI Multi-MSI allocation on their size
	s390/smp: Fix calling smp_call_ipl_cpu() from ipl CPU
	nvmet-rdma: Add unlikely for response allocated check
	nvmet-rdma: fix null dereference under heavy load
	f2fs: read page index before freeing
	btrfs: fix error handling in btrfs_dev_replace_start
	btrfs: dev-replace: go back to suspended state if target device is missing
	Linux 4.9.154

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

include/linux/compiler-clang.h

@@ -40,3 +40,17 @@
 #if __has_feature(address_sanitizer)
 #define __SANITIZE_ADDRESS__
 #endif
+
+/*
+ * Not all versions of clang implement the the type-generic versions
+ * of the builtin overflow checkers. Fortunately, clang implements
+ * __has_builtin allowing us to avoid awkward version
+ * checks. Unfortunately, we don't know which version of gcc clang
+ * pretends to be, so the macro may or may not be defined.
+ */
+#undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW
+#if __has_builtin(__builtin_mul_overflow) && \
+    __has_builtin(__builtin_add_overflow) && \
+    __has_builtin(__builtin_sub_overflow)
+#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
+#endif