Merge 4.4.185 into android-4.4

Changes in 4.4.185
	fs/binfmt_flat.c: make load_flat_shared_library() work
	mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
	scsi: vmw_pscsi: Fix use-after-free in pvscsi_queue_lck()
	tracing: Silence GCC 9 array bounds warning
	gcc-9: silence 'address-of-packed-member' warning
	usb: chipidea: udc: workaround for endpoint conflict issue
	Input: uinput - add compat ioctl number translation for UI_*_FF_UPLOAD
	apparmor: enforce nullbyte at end of tag string
	parport: Fix mem leak in parport_register_dev_model
	parisc: Fix compiler warnings in float emulation code
	IB/hfi1: Insure freeze_work work_struct is canceled on shutdown
	MIPS: uprobes: remove set but not used variable 'epc'
	net: hns: Fix loopback test failed at copper ports
	sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD
	scripts/checkstack.pl: Fix arm64 wrong or unknown architecture
	scsi: ufs: Check that space was properly alloced in copy_query_response
	s390/qeth: fix VLAN attribute in bridge_hostnotify udev event
	hwmon: (pmbus/core) Treat parameters as paged if on multiple pages
	Btrfs: fix race between readahead and device replace/removal
	btrfs: start readahead also in seed devices
	can: flexcan: fix timeout when set small bitrate
	can: purge socket error queue on sock destruct
	ARM: imx: cpuidle-imx6sx: Restrict the SW2ISO increase to i.MX6SX
	Bluetooth: Align minimum encryption key size for LE and BR/EDR connections
	Bluetooth: Fix regression with minimum encryption key size alignment
	SMB3: retry on STATUS_INSUFFICIENT_RESOURCES instead of failing write
	cfg80211: fix memory leak of wiphy device name
	mac80211: drop robust management frames from unknown TA
	perf ui helpline: Use strlcpy() as a shorter form of strncpy() + explicit set nul
	perf help: Remove needless use of strncpy()
	9p/rdma: do not disconnect on down_interruptible EAGAIN
	9p: acl: fix uninitialized iattr access
	9p/rdma: remove useless check in cm_event_handler
	9p: p9dirent_read: check network-provided name length
	net/9p: include trans_common.h to fix missing prototype warning.
	KVM: X86: Fix scan ioapic use-before-initialization
	ovl: modify ovl_permission() to do checks on two inodes
	x86/speculation: Allow guests to use SSBD even if host does not
	cpu/speculation: Warn on unsupported mitigations= parameter
	sctp: change to hold sk after auth shkey is created successfully
	tipc: change to use register_pernet_device
	tipc: check msg->req data len in tipc_nl_compat_bearer_disable
	team: Always enable vlan tx offload
	ipv4: Use return value of inet_iif() for __raw_v4_lookup in the while loop
	bonding: Always enable vlan tx offload
	net: check before dereferencing netdev_ops during busy poll
	Bluetooth: Fix faulty expression for minimum encryption key size check
	um: Compile with modern headers
	ASoC : cs4265 : readable register too low
	spi: bitbang: Fix NULL pointer dereference in spi_unregister_master
	ASoC: max98090: remove 24-bit format support if RJ is 0
	usb: gadget: fusb300_udc: Fix memory leak of fusb300->ep[i]
	usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC
	scsi: hpsa: correct ioaccel2 chaining
	ARC: Assume multiplier is always present
	ARC: fix build warning in elf.h
	MIPS: math-emu: do not use bools for arithmetic
	mfd: omap-usb-tll: Fix register offsets
	swiotlb: Make linux/swiotlb.h standalone includible
	bug.h: work around GCC PR82365 in BUG()
	MIPS: Workaround GCC __builtin_unreachable reordering bug
	ptrace: Fix ->ptracer_cred handling for PTRACE_TRACEME
	crypto: user - prevent operating on larval algorithms
	ALSA: seq: fix incorrect order of dest_client/dest_ports arguments
	ALSA: firewire-lib/fireworks: fix miss detection of received MIDI messages
	ALSA: usb-audio: fix sign unintended sign extension on left shifts
	lib/mpi: Fix karactx leak in mpi_powm
	btrfs: Ensure replaced device doesn't have pending chunk allocation
	tty: rocket: fix incorrect forward declaration of 'rp_init()'
	ARC: handle gcc generated __builtin_trap for older compiler
	arm64, vdso: Define vdso_{start,end} as array
	KVM: x86: degrade WARN to pr_warn_ratelimited
	dmaengine: imx-sdma: remove BD_INTR for channel0
	Linux 4.4.185

Change-Id: I222f9f81b9d7fba3cd3ac028b473b1ea2fae7cf0
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

6 files changed, 27 insertions, 2 deletions

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 630dd2372238..09aa521a0085 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -47,6 +47,7 @@ struct bug_entry {
 #ifndef HAVE_ARCH_BUG
 #define BUG() do { \
 	printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
+	barrier_before_unreachable(); \
 	panic("BUG!"); \
 } while (0)
 #endif
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 143d40e8a1ea..af8b4a879934 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -207,6 +207,15 @@
 
 #if GCC_VERSION >= 40500
 /*
+ * calling noreturn functions, __builtin_unreachable() and __builtin_trap()
+ * confuse the stack allocation in gcc, leading to overly large stack
+ * frames, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365
+ *
+ * Adding an empty inline assembly before it works around the problem
+ */
+#define barrier_before_unreachable() asm volatile("")
+
+/*
  * Mark a position in code as unreachable.  This can be used to
  * suppress control flow warnings after asm blocks that transfer
  * control elsewhere.
@@ -215,7 +224,11 @@
  * this in the preprocessor, but we can live with this because they're
  * unreleased.  Really, we need to have autoconf for the kernel.
  */
-#define unreachable() __builtin_unreachable()
+#define unreachable() \
+	do {					\
+		barrier_before_unreachable();	\
+		__builtin_unreachable();	\
+	} while (0)
 
 /* Mark a function definition as prohibited from being cloned. */
 #define __noclone	__attribute__((__noclone__, __optimize__("no-tracer")))
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 0db1fa621d8a..ed772311ec1f 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -175,6 +175,11 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
 # define barrier_data(ptr) barrier()
 #endif
 
+/* workaround for GCC PR82365 if needed */
+#ifndef barrier_before_unreachable
+# define barrier_before_unreachable() do { } while (0)
+#endif
+
 /* Unreachable code */
 #ifndef unreachable
 # define unreachable() do { } while (1)
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index e7a018eaf3a2..017fced60242 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -1,10 +1,13 @@
 #ifndef __LINUX_SWIOTLB_H
 #define __LINUX_SWIOTLB_H
 
+#include <linux/dma-direction.h>
+#include <linux/init.h>
 #include <linux/types.h>
 
 struct device;
 struct dma_attrs;
+struct page;
 struct scatterlist;
 
 extern int swiotlb_force;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 876688b5a356..7c0c83dfe86e 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -174,6 +174,9 @@ struct adv_info {
 
 #define HCI_MAX_SHORT_NAME_LENGTH	10
 
+/* Min encryption key size to match with SMP */
+#define HCI_MIN_ENC_KEY_SIZE		7
+
 /* Default LE RPA expiry time, 15 minutes */
 #define HCI_DEFAULT_RPA_TIMEOUT		(15 * 60)
 
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index 1d67fb6b23a0..6d238506d49b 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -93,7 +93,7 @@ static inline bool sk_busy_loop(struct sock *sk, int nonblock)
 		goto out;
 
 	ops = napi->dev->netdev_ops;
-	if (!ops->ndo_busy_poll)
+	if (!ops || !ops->ndo_busy_poll)
 		goto out;
 
 	do {