23 files changed, 150 insertions, 37 deletions

diff --git a/include/asm-generic/bitops/atomic.h b/include/asm-generic/bitops/atomic.h
index dd90c9792909..0e7316a86240 100644
--- a/include/asm-generic/bitops/atomic.h
+++ b/include/asm-generic/bitops/atomic.h
@@ -11,19 +11,19 @@
  * See Documentation/atomic_bitops.txt for details.
  */
 
-static inline void set_bit(unsigned int nr, volatile unsigned long *p)
+static __always_inline void set_bit(unsigned int nr, volatile unsigned long *p)
 {
 	p += BIT_WORD(nr);
 	atomic_long_or(BIT_MASK(nr), (atomic_long_t *)p);
 }
 
-static inline void clear_bit(unsigned int nr, volatile unsigned long *p)
+static __always_inline void clear_bit(unsigned int nr, volatile unsigned long *p)
 {
 	p += BIT_WORD(nr);
 	atomic_long_andnot(BIT_MASK(nr), (atomic_long_t *)p);
 }
 
-static inline void change_bit(unsigned int nr, volatile unsigned long *p)
+static __always_inline void change_bit(unsigned int nr, volatile unsigned long *p)
 {
 	p += BIT_WORD(nr);
 	atomic_long_xor(BIT_MASK(nr), (atomic_long_t *)p);
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 74c6c0486eed..555ab0fddbef 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -13,6 +13,12 @@
 /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145 */
 #if GCC_VERSION < 40900
 # error Sorry, your version of GCC is too old - please use 4.9 or newer.
+#elif defined(CONFIG_ARM64) && GCC_VERSION < 50100
+/*
+ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
+ * https://lore.kernel.org/r/20210107111841.GN1551@shell.armlinux.org.uk
+ */
+# error Sorry, your version of GCC is too old - please use 5.1 or newer.
 #endif
 
 /*
diff --git a/include/linux/device.h b/include/linux/device.h
index 89bb8b84173e..1779f90eeb4c 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -609,6 +609,18 @@ static inline const char *dev_name(const struct device *dev)
 	return kobject_name(&dev->kobj);
 }
 
+/**
+ * dev_bus_name - Return a device's bus/class name, if at all possible
+ * @dev: struct device to get the bus/class name of
+ *
+ * Will return the name of the bus/class the device is attached to.  If it is
+ * not attached to a bus/class, an empty string will be returned.
+ */
+static inline const char *dev_bus_name(const struct device *dev)
+{
+	return dev->bus ? dev->bus->name : (dev->class ? dev->class->name : "");
+}
+
 __printf(2, 3) int dev_set_name(struct device *dev, const char *name, ...);
 
 #ifdef CONFIG_NUMA
diff --git a/include/linux/dm-bufio.h b/include/linux/dm-bufio.h
index 29d255fdd5d6..90bd558a17f5 100644
--- a/include/linux/dm-bufio.h
+++ b/include/linux/dm-bufio.h
@@ -150,6 +150,7 @@ void dm_bufio_set_minimum_buffers(struct dm_bufio_client *c, unsigned n);
 
 unsigned dm_bufio_get_block_size(struct dm_bufio_client *c);
 sector_t dm_bufio_get_device_size(struct dm_bufio_client *c);
+struct dm_io_client *dm_bufio_get_dm_io_client(struct dm_bufio_client *c);
 sector_t dm_bufio_get_block_number(struct dm_buffer *b);
 void *dm_bufio_get_block_data(struct dm_buffer *b);
 void *dm_bufio_get_aux_data(struct dm_buffer *b);
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 5e0655fb2a6f..fe1ae73ff8b5 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -35,8 +35,12 @@ struct kunit_kasan_expectation {
 #define KASAN_SHADOW_INIT 0
 #endif
 
+#ifndef PTE_HWTABLE_PTRS
+#define PTE_HWTABLE_PTRS 0
+#endif
+
 extern unsigned char kasan_early_shadow_page[PAGE_SIZE];
-extern pte_t kasan_early_shadow_pte[PTRS_PER_PTE];
+extern pte_t kasan_early_shadow_pte[PTRS_PER_PTE + PTE_HWTABLE_PTRS];
 extern pmd_t kasan_early_shadow_pmd[PTRS_PER_PMD];
 extern pud_t kasan_early_shadow_pud[PTRS_PER_PUD];
 extern p4d_t kasan_early_shadow_p4d[MAX_PTRS_PER_P4D];
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index 65b81e0c494d..2484ed97e72f 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -33,6 +33,9 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data),
 					  unsigned int cpu,
 					  const char *namefmt);
 
+void kthread_set_per_cpu(struct task_struct *k, int cpu);
+bool kthread_is_per_cpu(struct task_struct *k);
+
 /**
  * kthread_run - create and wake a thread.
  * @threadfn: the function to run until signal_pending(current).
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index a12b5523cc18..73f20deb497d 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -230,6 +230,5 @@ static inline ktime_t ms_to_ktime(u64 ms)
 }
 
 # include <linux/timekeeping.h>
-# include <linux/timekeeping32.h>
 
 #endif
diff --git a/include/linux/mdio-bitbang.h b/include/linux/mdio-bitbang.h
index 5d71e8a8500f..aca4dc037b70 100644
--- a/include/linux/mdio-bitbang.h
+++ b/include/linux/mdio-bitbang.h
@@ -35,6 +35,9 @@ struct mdiobb_ctrl {
 	const struct mdiobb_ops *ops;
 };
 
+int mdiobb_read(struct mii_bus *bus, int phy, int reg);
+int mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val);
+
 /* The returned bus is not yet registered with the phy layer. */
 struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl);
 
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index d827bd7f3bfe..eeb0b52203e9 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -665,7 +665,7 @@ static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
 {
 	struct mem_cgroup *memcg = page_memcg(page);
 
-	VM_WARN_ON_ONCE_PAGE(!memcg, page);
+	VM_WARN_ON_ONCE_PAGE(!memcg && !mem_cgroup_disabled(), page);
 	return mem_cgroup_lruvec(memcg, pgdat);
 }
 
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index d92535997687..bfed36e342cc 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -116,6 +116,9 @@ enum {
 	NVME_REG_BPMBL	= 0x0048,	/* Boot Partition Memory Buffer
 					 * Location
 					 */
+	NVME_REG_CMBMSC = 0x0050,	/* Controller Memory Buffer Memory
+					 * Space Control
+					 */
 	NVME_REG_PMRCAP	= 0x0e00,	/* Persistent Memory Capabilities */
 	NVME_REG_PMRCTL	= 0x0e04,	/* Persistent Memory Region Control */
 	NVME_REG_PMRSTS	= 0x0e08,	/* Persistent Memory Region Status */
@@ -135,6 +138,7 @@ enum {
 #define NVME_CAP_CSS(cap)	(((cap) >> 37) & 0xff)
 #define NVME_CAP_MPSMIN(cap)	(((cap) >> 48) & 0xf)
 #define NVME_CAP_MPSMAX(cap)	(((cap) >> 52) & 0xf)
+#define NVME_CAP_CMBS(cap)	(((cap) >> 57) & 0x1)
 
 #define NVME_CMB_BIR(cmbloc)	((cmbloc) & 0x7)
 #define NVME_CMB_OFST(cmbloc)	(((cmbloc) >> 12) & 0xfffff)
@@ -192,6 +196,8 @@ enum {
 	NVME_CSTS_SHST_OCCUR	= 1 << 2,
 	NVME_CSTS_SHST_CMPLT	= 2 << 2,
 	NVME_CSTS_SHST_MASK	= 3 << 2,
+	NVME_CMBMSC_CRE		= 1 << 0,
+	NVME_CMBMSC_CMSE	= 1 << 1,
 };
 
 struct nvme_id_power_state {
diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index bf7966776c55..505480217cf1 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h
@@ -163,8 +163,6 @@ int arm_pmu_acpi_probe(armpmu_init_fn init_fn);
 static inline int arm_pmu_acpi_probe(armpmu_init_fn init_fn) { return 0; }
 #endif
 
-bool arm_pmu_irq_is_nmi(void);
-
 /* Internal functions only for core arm_pmu code */
 struct arm_pmu *armpmu_alloc(void);
 struct arm_pmu *armpmu_alloc_atomic(void);
diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h
index 2024944fd2f7..20e84a84fb77 100644
--- a/include/linux/regulator/consumer.h
+++ b/include/linux/regulator/consumer.h
@@ -332,6 +332,12 @@ regulator_get_exclusive(struct device *dev, const char *id)
 }
 
 static inline struct regulator *__must_check
+devm_regulator_get_exclusive(struct device *dev, const char *id)
+{
+	return ERR_PTR(-ENODEV);
+}
+
+static inline struct regulator *__must_check
 regulator_get_optional(struct device *dev, const char *id)
 {
 	return ERR_PTR(-ENODEV);
@@ -486,6 +492,11 @@ static inline int regulator_get_voltage(struct regulator *regulator)
 	return -EINVAL;
 }
 
+static inline int regulator_sync_voltage(struct regulator *regulator)
+{
+	return -EINVAL;
+}
+
 static inline int regulator_is_supported_voltage(struct regulator *regulator,
 				   int min_uV, int max_uV)
 {
@@ -578,6 +589,25 @@ static inline int devm_regulator_unregister_notifier(struct regulator *regulator
 	return 0;
 }
 
+static inline int regulator_suspend_enable(struct regulator_dev *rdev,
+					   suspend_state_t state)
+{
+	return -EINVAL;
+}
+
+static inline int regulator_suspend_disable(struct regulator_dev *rdev,
+					    suspend_state_t state)
+{
+	return -EINVAL;
+}
+
+static inline int regulator_set_suspend_voltage(struct regulator *regulator,
+						int min_uV, int max_uV,
+						suspend_state_t state)
+{
+	return -EINVAL;
+}
+
 static inline void *regulator_get_drvdata(struct regulator *regulator)
 {
 	return NULL;
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 333bcdc39635..5f60c9e907c9 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -366,7 +366,7 @@ static inline void skb_frag_size_sub(skb_frag_t *frag, int delta)
 static inline bool skb_frag_must_loop(struct page *p)
 {
 #if defined(CONFIG_HIGHMEM)
-	if (PageHighMem(p))
+	if (IS_ENABLED(CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP) || PageHighMem(p))
 		return true;
 #endif
 	return false;
@@ -1203,6 +1203,7 @@ struct skb_seq_state {
 	struct sk_buff	*root_skb;
 	struct sk_buff	*cur_skb;
 	__u8		*frag_data;
+	__u32		frag_off;
 };
 
 void skb_prepare_seq_read(struct sk_buff *skb, unsigned int from,
diff --git a/include/linux/timekeeping32.h b/include/linux/timekeeping32.h
deleted file mode 100644
index 266017fc9ee9..000000000000
--- a/include/linux/timekeeping32.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef _LINUX_TIMEKEEPING32_H
-#define _LINUX_TIMEKEEPING32_H
-/*
- * These interfaces are all based on the old timespec type
- * and should get replaced with the timespec64 based versions
- * over time so we can remove the file here.
- */
-
-static inline unsigned long get_seconds(void)
-{
-	return ktime_get_real_seconds();
-}
-
-#endif
diff --git a/include/linux/tty.h b/include/linux/tty.h
index c873f475f0a7..37803f3e6d49 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -421,6 +421,7 @@ extern void tty_kclose(struct tty_struct *tty);
 extern int tty_dev_name_to_number(const char *name, dev_t *number);
 extern int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout);
 extern void tty_ldisc_unlock(struct tty_struct *tty);
+extern ssize_t redirected_tty_write(struct kiocb *, struct iov_iter *);
 #else
 static inline void tty_kref_put(struct tty_struct *tty)
 { }
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 88a7673894d5..cfbfd6fe01df 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -81,6 +81,8 @@ struct usbnet {
 #		define EVENT_LINK_CHANGE	11
 #		define EVENT_SET_RX_MODE	12
 #		define EVENT_NO_IP_ALIGN	13
+	u32			rx_speed;	/* in bps - NOT Mbps */
+	u32			tx_speed;	/* in bps - NOT Mbps */
 };
 
 static inline struct usb_driver *driver_of(struct usb_interface *intf)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 9a4bbccddc7f..0d6f7ec86061 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1756,7 +1756,7 @@ struct cfg80211_sar_specs {
 
 
 /**
- * @struct cfg80211_sar_chan_ranges - sar frequency ranges
+ * struct cfg80211_sar_freq_ranges - sar frequency ranges
  * @start_freq:  start range edge frequency
  * @end_freq:    end range edge frequency
  */
@@ -3972,6 +3972,8 @@ struct mgmt_frame_regs {
  *	This callback may sleep.
  * @reset_tid_config: Reset TID specific configuration for the peer, for the
  *	given TIDs. This callback may sleep.
+ *
+ * @set_sar_specs: Update the SAR (TX power) settings.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -4929,6 +4931,7 @@ struct wiphy_iftype_akm_suites {
  * @max_data_retry_count: maximum supported per TID retry count for
  *	configuration through the %NL80211_TID_CONFIG_ATTR_RETRY_SHORT and
  *	%NL80211_TID_CONFIG_ATTR_RETRY_LONG attributes
+ * @sar_capa: SAR control capabilities
  */
 struct wiphy {
 	/* assign these fields before you register the wiphy */
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 7338b3865a2a..111d7771b208 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -76,6 +76,8 @@ struct inet_connection_sock_af_ops {
  * @icsk_ext_hdr_len:	   Network protocol overhead (IP/IPv6 options)
  * @icsk_ack:		   Delayed ACK control data
  * @icsk_mtup;		   MTU probing control data
+ * @icsk_probes_tstamp:    Probe timestamp (cleared by non-zero window ack)
+ * @icsk_user_timeout:	   TCP_USER_TIMEOUT value
  */
 struct inet_connection_sock {
 	/* inet_sock has to be the first member! */
@@ -129,6 +131,7 @@ struct inet_connection_sock {
 
 		u32		  probe_timestamp;
 	} icsk_mtup;
+	u32			  icsk_probes_tstamp;
 	u32			  icsk_user_timeout;
 
 	u64			  icsk_ca_priv[104 / sizeof(u64)];
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index d315740581f1..2bdbf62f4ecd 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3880,6 +3880,7 @@ enum ieee80211_reconfig_type {
  *	This callback may sleep.
  * @sta_set_4addr: Called to notify the driver when a station starts/stops using
  *	4-address mode
+ * @set_sar_specs: Update the SAR (TX power) settings.
  */
 struct ieee80211_ops {
 	void (*tx)(struct ieee80211_hw *hw,
diff --git a/include/net/sock.h b/include/net/sock.h
index bdc4323ce53c..129d200bccb4 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1921,10 +1921,13 @@ static inline void sk_set_txhash(struct sock *sk)
 	sk->sk_txhash = net_tx_rndhash();
 }
 
-static inline void sk_rethink_txhash(struct sock *sk)
+static inline bool sk_rethink_txhash(struct sock *sk)
 {
-	if (sk->sk_txhash)
+	if (sk->sk_txhash) {
 		sk_set_txhash(sk);
+		return true;
+	}
+	return false;
 }
 
 static inline struct dst_entry *
@@ -1947,12 +1950,10 @@ sk_dst_get(struct sock *sk)
 	return dst;
 }
 
-static inline void dst_negative_advice(struct sock *sk)
+static inline void __dst_negative_advice(struct sock *sk)
 {
 	struct dst_entry *ndst, *dst = __sk_dst_get(sk);
 
-	sk_rethink_txhash(sk);
-
 	if (dst && dst->ops->negative_advice) {
 		ndst = dst->ops->negative_advice(dst);
 
@@ -1964,6 +1965,12 @@ static inline void dst_negative_advice(struct sock *sk)
 	}
 }
 
+static inline void dst_negative_advice(struct sock *sk)
+{
+	sk_rethink_txhash(sk);
+	__dst_negative_advice(sk);
+}
+
 static inline void
 __sk_dst_set(struct sock *sk, struct dst_entry *dst)
 {
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 5039af667645..cbe3e152d24c 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -366,7 +366,7 @@ TRACE_EVENT(sched_process_wait,
 );
 
 /*
- * Tracepoint for do_fork:
+ * Tracepoint for kernel_clone:
  */
 TRACE_EVENT(sched_process_fork,
 
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 58994e013022..6f89c27265f5 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -1424,13 +1424,61 @@ TRACE_EVENT(rpcb_unregister,
 	)
 );
 
+/* Record an xdr_buf containing a fully-formed RPC message */
+DECLARE_EVENT_CLASS(svc_xdr_msg_class,
+	TP_PROTO(
+		const struct xdr_buf *xdr
+	),
+
+	TP_ARGS(xdr),
+
+	TP_STRUCT__entry(
+		__field(u32, xid)
+		__field(const void *, head_base)
+		__field(size_t, head_len)
+		__field(const void *, tail_base)
+		__field(size_t, tail_len)
+		__field(unsigned int, page_len)
+		__field(unsigned int, msg_len)
+	),
+
+	TP_fast_assign(
+		__be32 *p = (__be32 *)xdr->head[0].iov_base;
+
+		__entry->xid = be32_to_cpu(*p);
+		__entry->head_base = p;
+		__entry->head_len = xdr->head[0].iov_len;
+		__entry->tail_base = xdr->tail[0].iov_base;
+		__entry->tail_len = xdr->tail[0].iov_len;
+		__entry->page_len = xdr->page_len;
+		__entry->msg_len = xdr->len;
+	),
+
+	TP_printk("xid=0x%08x head=[%p,%zu] page=%u tail=[%p,%zu] len=%u",
+		__entry->xid,
+		__entry->head_base, __entry->head_len, __entry->page_len,
+		__entry->tail_base, __entry->tail_len, __entry->msg_len
+	)
+);
+
+#define DEFINE_SVCXDRMSG_EVENT(name)					\
+		DEFINE_EVENT(svc_xdr_msg_class,				\
+				svc_xdr_##name,				\
+				TP_PROTO(				\
+					const struct xdr_buf *xdr	\
+				),					\
+				TP_ARGS(xdr))
+
+DEFINE_SVCXDRMSG_EVENT(recvfrom);
+
+/* Record an xdr_buf containing arbitrary data, tagged with an XID */
 DECLARE_EVENT_CLASS(svc_xdr_buf_class,
 	TP_PROTO(
-		const struct svc_rqst *rqst,
+		__be32 xid,
 		const struct xdr_buf *xdr
 	),
 
-	TP_ARGS(rqst, xdr),
+	TP_ARGS(xid, xdr),
 
 	TP_STRUCT__entry(
 		__field(u32, xid)
@@ -1443,7 +1491,7 @@ DECLARE_EVENT_CLASS(svc_xdr_buf_class,
 	),
 
 	TP_fast_assign(
-		__entry->xid = be32_to_cpu(rqst->rq_xid);
+		__entry->xid = be32_to_cpu(xid);
 		__entry->head_base = xdr->head[0].iov_base;
 		__entry->head_len = xdr->head[0].iov_len;
 		__entry->tail_base = xdr->tail[0].iov_base;
@@ -1463,12 +1511,11 @@ DECLARE_EVENT_CLASS(svc_xdr_buf_class,
 		DEFINE_EVENT(svc_xdr_buf_class,				\
 				svc_xdr_##name,				\
 				TP_PROTO(				\
-					const struct svc_rqst *rqst,	\
+					__be32 xid,			\
 					const struct xdr_buf *xdr	\
 				),					\
-				TP_ARGS(rqst, xdr))
+				TP_ARGS(xid, xdr))
 
-DEFINE_SVCXDRBUF_EVENT(recvfrom);
 DEFINE_SVCXDRBUF_EVENT(sendto);
 
 /*
diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h
index 00c7235ae93e..2c43b0ef1e4d 100644
--- a/include/xen/xenbus.h
+++ b/include/xen/xenbus.h
@@ -192,7 +192,7 @@ void xs_suspend_cancel(void);
 
 struct work_struct;
 
-void xenbus_probe(struct work_struct *);
+void xenbus_probe(void);
 
 #define XENBUS_IS_ERR_READ(str) ({			\
 	if (!IS_ERR(str) && strlen(str) == 0) {		\