19 files changed, 200 insertions, 153 deletions

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index b23eeca4d677..794b2a33a2c3 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -235,6 +235,8 @@ enum hctx_type {
  * @flags:	   Zero or more BLK_MQ_F_* flags.
  * @driver_data:   Pointer to data owned by the block driver that created this
  *		   tag set.
+ * @active_queues_shared_sbitmap:
+ * 		   number of active request queues per tag set.
  * @__bitmap_tags: A shared tags sbitmap, used over all hctx's
  * @__breserved_tags:
  *		   A shared reserved tags sbitmap, used over all hctx's
diff --git a/include/linux/can/skb.h b/include/linux/can/skb.h
index 900b9f4e0605..fc61cf4eff1c 100644
--- a/include/linux/can/skb.h
+++ b/include/linux/can/skb.h
@@ -61,21 +61,17 @@ static inline void can_skb_set_owner(struct sk_buff *skb, struct sock *sk)
  */
 static inline struct sk_buff *can_create_echo_skb(struct sk_buff *skb)
 {
-	if (skb_shared(skb)) {
-		struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);
+	struct sk_buff *nskb;
 
-		if (likely(nskb)) {
-			can_skb_set_owner(nskb, skb->sk);
-			consume_skb(skb);
-			return nskb;
-		} else {
-			kfree_skb(skb);
-			return NULL;
-		}
+	nskb = skb_clone(skb, GFP_ATOMIC);
+	if (unlikely(!nskb)) {
+		kfree_skb(skb);
+		return NULL;
 	}
 
-	/* we can assume to have an unshared skb with proper owner */
-	return skb;
+	can_skb_set_owner(nskb, skb->sk);
+	consume_skb(skb);
+	return nskb;
 }
 
 #endif /* !_CAN_SKB_H */
diff --git a/include/linux/console.h b/include/linux/console.h
index 4b1e26c4cb42..20874db50bc8 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -62,7 +62,6 @@ struct consw {
 	int	(*con_font_get)(struct vc_data *vc, struct console_font *font);
 	int	(*con_font_default)(struct vc_data *vc,
 			struct console_font *font, char *name);
-	int	(*con_font_copy)(struct vc_data *vc, int con);
 	int     (*con_resize)(struct vc_data *vc, unsigned int width,
 			unsigned int height, unsigned int user);
 	void	(*con_set_palette)(struct vc_data *vc,
diff --git a/include/linux/dma-buf-map.h b/include/linux/dma-buf-map.h
index fd1aba545fdf..583a3a1f9447 100644
--- a/include/linux/dma-buf-map.h
+++ b/include/linux/dma-buf-map.h
@@ -7,6 +7,7 @@
 #define __DMA_BUF_MAP_H__
 
 #include <linux/io.h>
+#include <linux/string.h>
 
 /**
  * DOC: overview
@@ -32,6 +33,14 @@
  * accessing the buffer. Use the returned instance and the helper functions
  * to access the buffer's memory in the correct way.
  *
+ * The type :c:type:`struct dma_buf_map <dma_buf_map>` and its helpers are
+ * actually independent from the dma-buf infrastructure. When sharing buffers
+ * among devices, drivers have to know the location of the memory to access
+ * the buffers in a safe way. :c:type:`struct dma_buf_map <dma_buf_map>`
+ * solves this problem for dma-buf and its users. If other drivers or
+ * sub-systems require similar functionality, the type could be generalized
+ * and moved to a more prominent header file.
+ *
  * Open-coding access to :c:type:`struct dma_buf_map <dma_buf_map>` is
  * considered bad style. Rather then accessing its fields directly, use one
  * of the provided helper functions, or implement your own. For example,
@@ -45,6 +54,20 @@
  *
  *	dma_buf_map_set_vaddr(&map. 0xdeadbeaf);
  *
+ * To set an address in I/O memory, use dma_buf_map_set_vaddr_iomem().
+ *
+ * .. code-block:: c
+ *
+ *	dma_buf_map_set_vaddr_iomem(&map. 0xdeadbeaf);
+ *
+ * Instances of struct dma_buf_map do not have to be cleaned up, but
+ * can be cleared to NULL with dma_buf_map_clear(). Cleared mappings
+ * always refer to system memory.
+ *
+ * .. code-block:: c
+ *
+ *	dma_buf_map_clear(&map);
+ *
  * Test if a mapping is valid with either dma_buf_map_is_set() or
  * dma_buf_map_is_null().
  *
@@ -67,17 +90,19 @@
  *	if (dma_buf_map_is_equal(&sys_map, &io_map))
  *		// always false
  *
- * Instances of struct dma_buf_map do not have to be cleaned up, but
- * can be cleared to NULL with dma_buf_map_clear(). Cleared mappings
- * always refer to system memory.
+ * A set up instance of struct dma_buf_map can be used to access or manipulate
+ * the buffer memory. Depending on the location of the memory, the provided
+ * helpers will pick the correct operations. Data can be copied into the memory
+ * with dma_buf_map_memcpy_to(). The address can be manipulated with
+ * dma_buf_map_incr().
  *
- * The type :c:type:`struct dma_buf_map <dma_buf_map>` and its helpers are
- * actually independent from the dma-buf infrastructure. When sharing buffers
- * among devices, drivers have to know the location of the memory to access
- * the buffers in a safe way. :c:type:`struct dma_buf_map <dma_buf_map>`
- * solves this problem for dma-buf and its users. If other drivers or
- * sub-systems require similar functionality, the type could be generalized
- * and moved to a more prominent header file.
+ * .. code-block:: c
+ *
+ *	const void *src = ...; // source buffer
+ *	size_t len = ...; // length of src
+ *
+ *	dma_buf_map_memcpy_to(&map, src, len);
+ *	dma_buf_map_incr(&map, len); // go to first byte after the memcpy
  */
 
 /**
@@ -119,6 +144,20 @@ static inline void dma_buf_map_set_vaddr(struct dma_buf_map *map, void *vaddr)
 }
 
 /**
+ * dma_buf_map_set_vaddr_iomem - Sets a dma-buf mapping structure to an address in I/O memory
+ * @map:		The dma-buf mapping structure
+ * @vaddr_iomem:	An I/O-memory address
+ *
+ * Sets the address and the I/O-memory flag.
+ */
+static inline void dma_buf_map_set_vaddr_iomem(struct dma_buf_map *map,
+					       void __iomem *vaddr_iomem)
+{
+	map->vaddr_iomem = vaddr_iomem;
+	map->is_iomem = true;
+}
+
+/**
  * dma_buf_map_is_equal - Compares two dma-buf mapping structures for equality
  * @lhs:	The dma-buf mapping structure
  * @rhs:	A dma-buf mapping structure to compare with
@@ -190,4 +229,38 @@ static inline void dma_buf_map_clear(struct dma_buf_map *map)
 	}
 }
 
+/**
+ * dma_buf_map_memcpy_to - Memcpy into dma-buf mapping
+ * @dst:	The dma-buf mapping structure
+ * @src:	The source buffer
+ * @len:	The number of byte in src
+ *
+ * Copies data into a dma-buf mapping. The source buffer is in system
+ * memory. Depending on the buffer's location, the helper picks the correct
+ * method of accessing the memory.
+ */
+static inline void dma_buf_map_memcpy_to(struct dma_buf_map *dst, const void *src, size_t len)
+{
+	if (dst->is_iomem)
+		memcpy_toio(dst->vaddr_iomem, src, len);
+	else
+		memcpy(dst->vaddr, src, len);
+}
+
+/**
+ * dma_buf_map_incr - Increments the address stored in a dma-buf mapping
+ * @map:	The dma-buf mapping structure
+ * @incr:	The number of bytes to increment
+ *
+ * Increments the address stored in a dma-buf mapping. Depending on the
+ * buffer's location, the correct value will be updated.
+ */
+static inline void dma_buf_map_incr(struct dma_buf_map *map, size_t incr)
+{
+	if (map->is_iomem)
+		map->vaddr_iomem += incr;
+	else
+		map->vaddr += incr;
+}
+
 #endif /* __DMA_BUF_MAP_H__ */
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 03875eaed51a..cf72699cb2bc 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -273,7 +273,7 @@ struct dma_buf_ops {
 
 /**
  * struct dma_buf - shared buffer object
- * @size: size of the buffer
+ * @size: size of the buffer; invariant over the lifetime of the buffer.
  * @file: file pointer used for sharing buffers across, and for refcounting.
  * @attachments: list of dma_buf_attachment that denotes all devices attached,
  *               protected by dma_resv lock.
@@ -405,7 +405,7 @@ struct dma_buf_attachment {
  * @exp_name:	name of the exporter - useful for debugging.
  * @owner:	pointer to exporter module - used for refcounting kernel module
  * @ops:	Attach allocator-defined dma buf ops to the new buffer
- * @size:	Size of the buffer
+ * @size:	Size of the buffer - invariant over the lifetime of the buffer
  * @flags:	mode flags for the file
  * @resv:	reservation-object, NULL to allocate default one
  * @priv:	Attach private data of allocator to this buffer
diff --git a/include/linux/font.h b/include/linux/font.h
index b5b312c19e46..abf1442ce719 100644
--- a/include/linux/font.h
+++ b/include/linux/font.h
@@ -16,7 +16,8 @@
 struct font_desc {
     int idx;
     const char *name;
-    int width, height;
+    unsigned int width, height;
+    unsigned int charcount;
     const void *data;
     int pref;
 };
diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index 868364cea3b7..35b2d845704d 100644
--- a/include/linux/io_uring.h
+++ b/include/linux/io_uring.h
@@ -30,7 +30,8 @@ struct io_uring_task {
 	struct percpu_counter	inflight;
 	struct io_identity	__identity;
 	struct io_identity	*identity;
-	bool			in_idle;
+	atomic_t		in_idle;
+	bool			sqpoll;
 };
 
 #if defined(CONFIG_IO_URING)
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 172b3397a1a3..5bd3cac4df9c 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -221,7 +221,7 @@ struct iomap_writeback_ops {
 	 * Optional, allows the file system to discard state on a page where
 	 * we failed to submit any I/O.
 	 */
-	void (*discard_page)(struct page *page);
+	void (*discard_page)(struct page *page, loff_t fileoff);
 };
 
 struct iomap_writepage_ctx {
diff --git a/include/linux/mm.h b/include/linux/mm.h
index ef360fe70aaf..db6ae4d3fb4e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2759,6 +2759,15 @@ static inline vm_fault_t vmf_insert_page(struct vm_area_struct *vma,
 	return VM_FAULT_NOPAGE;
 }
 
+#ifndef io_remap_pfn_range
+static inline int io_remap_pfn_range(struct vm_area_struct *vma,
+				     unsigned long addr, unsigned long pfn,
+				     unsigned long size, pgprot_t prot)
+{
+	return remap_pfn_range(vma, addr, pfn, size, pgprot_decrypted(prot));
+}
+#endif
+
 static inline vm_fault_t vmf_error(int err)
 {
 	if (err == -ENOMEM)
diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h
index 89016d08f6a2..f6267e2883f2 100644
--- a/include/linux/netfilter/nfnetlink.h
+++ b/include/linux/netfilter/nfnetlink.h
@@ -24,6 +24,12 @@ struct nfnl_callback {
 	const u_int16_t attr_count;		/* number of nlattr's */
 };
 
+enum nfnl_abort_action {
+	NFNL_ABORT_NONE		= 0,
+	NFNL_ABORT_AUTOLOAD,
+	NFNL_ABORT_VALIDATE,
+};
+
 struct nfnetlink_subsystem {
 	const char *name;
 	__u8 subsys_id;			/* nfnetlink subsystem ID */
@@ -31,7 +37,8 @@ struct nfnetlink_subsystem {
 	const struct nfnl_callback *cb;	/* callback for individual types */
 	struct module *owner;
 	int (*commit)(struct net *net, struct sk_buff *skb);
-	int (*abort)(struct net *net, struct sk_buff *skb, bool autoload);
+	int (*abort)(struct net *net, struct sk_buff *skb,
+		     enum nfnl_abort_action action);
 	void (*cleanup)(struct net *net);
 	bool (*valid_genid)(struct net *net, u32 genid);
 };
diff --git a/include/linux/netfilter_ipv4.h b/include/linux/netfilter_ipv4.h
index 082e2c41b7ff..5b70ca868bb1 100644
--- a/include/linux/netfilter_ipv4.h
+++ b/include/linux/netfilter_ipv4.h
@@ -16,7 +16,7 @@ struct ip_rt_info {
 	u_int32_t mark;
 };
 
-int ip_route_me_harder(struct net *net, struct sk_buff *skb, unsigned addr_type);
+int ip_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb, unsigned addr_type);
 
 struct nf_queue_entry;
 
diff --git a/include/linux/netfilter_ipv6.h b/include/linux/netfilter_ipv6.h
index 9b67394471e1..48314ade1506 100644
--- a/include/linux/netfilter_ipv6.h
+++ b/include/linux/netfilter_ipv6.h
@@ -42,7 +42,7 @@ struct nf_ipv6_ops {
 #if IS_MODULE(CONFIG_IPV6)
 	int (*chk_addr)(struct net *net, const struct in6_addr *addr,
 			const struct net_device *dev, int strict);
-	int (*route_me_harder)(struct net *net, struct sk_buff *skb);
+	int (*route_me_harder)(struct net *net, struct sock *sk, struct sk_buff *skb);
 	int (*dev_get_saddr)(struct net *net, const struct net_device *dev,
 		       const struct in6_addr *daddr, unsigned int srcprefs,
 		       struct in6_addr *saddr);
@@ -143,9 +143,9 @@ static inline int nf_br_ip6_fragment(struct net *net, struct sock *sk,
 #endif
 }
 
-int ip6_route_me_harder(struct net *net, struct sk_buff *skb);
+int ip6_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb);
 
-static inline int nf_ip6_route_me_harder(struct net *net, struct sk_buff *skb)
+static inline int nf_ip6_route_me_harder(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
 #if IS_MODULE(CONFIG_IPV6)
 	const struct nf_ipv6_ops *v6_ops = nf_get_ipv6_ops();
@@ -153,9 +153,9 @@ static inline int nf_ip6_route_me_harder(struct net *net, struct sk_buff *skb)
 	if (!v6_ops)
 		return -EHOSTUNREACH;
 
-	return v6_ops->route_me_harder(net, skb);
+	return v6_ops->route_me_harder(net, sk, skb);
 #elif IS_BUILTIN(CONFIG_IPV6)
-	return ip6_route_me_harder(net, skb);
+	return ip6_route_me_harder(net, sk, skb);
 #else
 	return -EHOSTUNREACH;
 #endif
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index c77b7c31b2e4..e1e19c1f9ec9 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -344,9 +344,9 @@ static inline struct page *find_get_page_flags(struct address_space *mapping,
 /**
  * find_lock_page - locate, pin and lock a pagecache page
  * @mapping: the address_space to search
- * @offset: the page index
+ * @index: the page index
  *
- * Looks up the page cache entry at @mapping & @offset.  If there is a
+ * Looks up the page cache entry at @mapping & @index.  If there is a
  * page cache page, it is returned locked and with an increased
  * refcount.
  *
@@ -363,9 +363,9 @@ static inline struct page *find_lock_page(struct address_space *mapping,
 /**
  * find_lock_head - Locate, pin and lock a pagecache page.
  * @mapping: The address_space to search.
- * @offset: The page index.
+ * @index: The page index.
  *
- * Looks up the page cache entry at @mapping & @offset.  If there is a
+ * Looks up the page cache entry at @mapping & @index.  If there is a
  * page cache page, its head page is returned locked and with an increased
  * refcount.
  *
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 38c33eabea89..71125a4676c4 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1427,10 +1427,6 @@ typedef unsigned int pgtbl_mod_mask;
 
 #endif /* !__ASSEMBLY__ */
 
-#ifndef io_remap_pfn_range
-#define io_remap_pfn_range remap_pfn_range
-#endif
-
 #ifndef has_transparent_hugepage
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 #define has_transparent_hugepage() 1
diff --git a/include/linux/phy.h b/include/linux/phy.h
index eb3cb1a98b45..56563e5e0dc7 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -147,16 +147,8 @@ typedef enum {
 	PHY_INTERFACE_MODE_MAX,
 } phy_interface_t;
 
-/**
+/*
  * phy_supported_speeds - return all speeds currently supported by a PHY device
- * @phy: The PHY device to return supported speeds of.
- * @speeds: buffer to store supported speeds in.
- * @size: size of speeds buffer.
- *
- * Description: Returns the number of supported speeds, and fills
- * the speeds buffer with the supported speeds. If speeds buffer is
- * too small to contain all currently supported speeds, will return as
- * many speeds as can fit.
  */
 unsigned int phy_supported_speeds(struct phy_device *phy,
 				      unsigned int *speeds,
@@ -1022,14 +1014,9 @@ static inline int __phy_modify_changed(struct phy_device *phydev, u32 regnum,
 					regnum, mask, set);
 }
 
-/**
+/*
  * phy_read_mmd - Convenience function for reading a register
  * from an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to read from
- * @regnum: The register on the MMD to read
- *
- * Same rules as for phy_read();
  */
 int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum);
 
@@ -1064,38 +1051,21 @@ int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum);
 	__ret; \
 })
 
-/**
+/*
  * __phy_read_mmd - Convenience function for reading a register
  * from an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to read from
- * @regnum: The register on the MMD to read
- *
- * Same rules as for __phy_read();
  */
 int __phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum);
 
-/**
+/*
  * phy_write_mmd - Convenience function for writing a register
  * on an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to write to
- * @regnum: The register on the MMD to read
- * @val: value to write to @regnum
- *
- * Same rules as for phy_write();
  */
 int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val);
 
-/**
+/*
  * __phy_write_mmd - Convenience function for writing a register
  * on an MMD on a given PHY.
- * @phydev: The phy_device struct
- * @devad: The MMD to write to
- * @regnum: The register on the MMD to read
- * @val: value to write to @regnum
- *
- * Same rules as for __phy_write();
  */
 int __phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val);
 
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 18b02dcc168e..4b708f4e8eed 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -54,11 +54,10 @@ extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
 extern void pm_runtime_update_max_time_suspended(struct device *dev,
 						 s64 delta_ns);
 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
-extern void pm_runtime_clean_up_links(struct device *dev);
 extern void pm_runtime_get_suppliers(struct device *dev);
 extern void pm_runtime_put_suppliers(struct device *dev);
 extern void pm_runtime_new_link(struct device *dev);
-extern void pm_runtime_drop_link(struct device *dev);
+extern void pm_runtime_drop_link(struct device_link *link);
 
 /**
  * pm_runtime_get_if_in_use - Conditionally bump up runtime PM usage counter.
@@ -276,11 +275,10 @@ static inline u64 pm_runtime_autosuspend_expiration(
 				struct device *dev) { return 0; }
 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
 						bool enable){}
-static inline void pm_runtime_clean_up_links(struct device *dev) {}
 static inline void pm_runtime_get_suppliers(struct device *dev) {}
 static inline void pm_runtime_put_suppliers(struct device *dev) {}
 static inline void pm_runtime_new_link(struct device *dev) {}
-static inline void pm_runtime_drop_link(struct device *dev) {}
+static inline void pm_runtime_drop_link(struct device_link *link) {}
 
 #endif /* !CONFIG_PM */
 
diff --git a/include/linux/refcount.h b/include/linux/refcount.h
index 7fabb1af18e0..497990c69b0b 100644
--- a/include/linux/refcount.h
+++ b/include/linux/refcount.h
@@ -147,24 +147,6 @@ static inline unsigned int refcount_read(const refcount_t *r)
 	return atomic_read(&r->refs);
 }
 
-/**
- * refcount_add_not_zero - add a value to a refcount unless it is 0
- * @i: the value to add to the refcount
- * @r: the refcount
- *
- * Will saturate at REFCOUNT_SATURATED and WARN.
- *
- * Provides no memory ordering, it is assumed the caller has guaranteed the
- * object memory to be stable (RCU, etc.). It does provide a control dependency
- * and thereby orders future stores. See the comment on top.
- *
- * Use of this function is not recommended for the normal reference counting
- * use case in which references are taken and released one at a time.  In these
- * cases, refcount_inc(), or one of its variants, should instead be used to
- * increment a reference count.
- *
- * Return: false if the passed refcount is 0, true otherwise
- */
 static inline __must_check bool __refcount_add_not_zero(int i, refcount_t *r, int *oldp)
 {
 	int old = refcount_read(r);
@@ -183,17 +165,12 @@ static inline __must_check bool __refcount_add_not_zero(int i, refcount_t *r, in
 	return old;
 }
 
-static inline __must_check bool refcount_add_not_zero(int i, refcount_t *r)
-{
-	return __refcount_add_not_zero(i, r, NULL);
-}
-
 /**
- * refcount_add - add a value to a refcount
+ * refcount_add_not_zero - add a value to a refcount unless it is 0
  * @i: the value to add to the refcount
  * @r: the refcount
  *
- * Similar to atomic_add(), but will saturate at REFCOUNT_SATURATED and WARN.
+ * Will saturate at REFCOUNT_SATURATED and WARN.
  *
  * Provides no memory ordering, it is assumed the caller has guaranteed the
  * object memory to be stable (RCU, etc.). It does provide a control dependency
@@ -203,7 +180,14 @@ static inline __must_check bool refcount_add_not_zero(int i, refcount_t *r)
  * use case in which references are taken and released one at a time.  In these
  * cases, refcount_inc(), or one of its variants, should instead be used to
  * increment a reference count.
+ *
+ * Return: false if the passed refcount is 0, true otherwise
  */
+static inline __must_check bool refcount_add_not_zero(int i, refcount_t *r)
+{
+	return __refcount_add_not_zero(i, r, NULL);
+}
+
 static inline void __refcount_add(int i, refcount_t *r, int *oldp)
 {
 	int old = atomic_fetch_add_relaxed(i, &r->refs);
@@ -217,11 +201,32 @@ static inline void __refcount_add(int i, refcount_t *r, int *oldp)
 		refcount_warn_saturate(r, REFCOUNT_ADD_OVF);
 }
 
+/**
+ * refcount_add - add a value to a refcount
+ * @i: the value to add to the refcount
+ * @r: the refcount
+ *
+ * Similar to atomic_add(), but will saturate at REFCOUNT_SATURATED and WARN.
+ *
+ * Provides no memory ordering, it is assumed the caller has guaranteed the
+ * object memory to be stable (RCU, etc.). It does provide a control dependency
+ * and thereby orders future stores. See the comment on top.
+ *
+ * Use of this function is not recommended for the normal reference counting
+ * use case in which references are taken and released one at a time.  In these
+ * cases, refcount_inc(), or one of its variants, should instead be used to
+ * increment a reference count.
+ */
 static inline void refcount_add(int i, refcount_t *r)
 {
 	__refcount_add(i, r, NULL);
 }
 
+static inline __must_check bool __refcount_inc_not_zero(refcount_t *r, int *oldp)
+{
+	return __refcount_add_not_zero(1, r, oldp);
+}
+
 /**
  * refcount_inc_not_zero - increment a refcount unless it is 0
  * @r: the refcount to increment
@@ -235,14 +240,14 @@ static inline void refcount_add(int i, refcount_t *r)
  *
  * Return: true if the increment was successful, false otherwise
  */
-static inline __must_check bool __refcount_inc_not_zero(refcount_t *r, int *oldp)
+static inline __must_check bool refcount_inc_not_zero(refcount_t *r)
 {
-	return __refcount_add_not_zero(1, r, oldp);
+	return __refcount_inc_not_zero(r, NULL);
 }
 
-static inline __must_check bool refcount_inc_not_zero(refcount_t *r)
+static inline void __refcount_inc(refcount_t *r, int *oldp)
 {
-	return __refcount_inc_not_zero(r, NULL);
+	__refcount_add(1, r, oldp);
 }
 
 /**
@@ -257,14 +262,27 @@ static inline __must_check bool refcount_inc_not_zero(refcount_t *r)
  * Will WARN if the refcount is 0, as this represents a possible use-after-free
  * condition.
  */
-static inline void __refcount_inc(refcount_t *r, int *oldp)
+static inline void refcount_inc(refcount_t *r)
 {
-	__refcount_add(1, r, oldp);
+	__refcount_inc(r, NULL);
 }
 
-static inline void refcount_inc(refcount_t *r)
+static inline __must_check bool __refcount_sub_and_test(int i, refcount_t *r, int *oldp)
 {
-	__refcount_inc(r, NULL);
+	int old = atomic_fetch_sub_release(i, &r->refs);
+
+	if (oldp)
+		*oldp = old;
+
+	if (old == i) {
+		smp_acquire__after_ctrl_dep();
+		return true;
+	}
+
+	if (unlikely(old < 0 || old - i < 0))
+		refcount_warn_saturate(r, REFCOUNT_SUB_UAF);
+
+	return false;
 }
 
 /**
@@ -287,27 +305,14 @@ static inline void refcount_inc(refcount_t *r)
  *
  * Return: true if the resulting refcount is 0, false otherwise
  */
-static inline __must_check bool __refcount_sub_and_test(int i, refcount_t *r, int *oldp)
+static inline __must_check bool refcount_sub_and_test(int i, refcount_t *r)
 {
-	int old = atomic_fetch_sub_release(i, &r->refs);
-
-	if (oldp)
-		*oldp = old;
-
-	if (old == i) {
-		smp_acquire__after_ctrl_dep();
-		return true;
-	}
-
-	if (unlikely(old < 0 || old - i < 0))
-		refcount_warn_saturate(r, REFCOUNT_SUB_UAF);
-
-	return false;
+	return __refcount_sub_and_test(i, r, NULL);
 }
 
-static inline __must_check bool refcount_sub_and_test(int i, refcount_t *r)
+static inline __must_check bool __refcount_dec_and_test(refcount_t *r, int *oldp)
 {
-	return __refcount_sub_and_test(i, r, NULL);
+	return __refcount_sub_and_test(1, r, oldp);
 }
 
 /**
@@ -323,26 +328,11 @@ static inline __must_check bool refcount_sub_and_test(int i, refcount_t *r)
  *
  * Return: true if the resulting refcount is 0, false otherwise
  */
-static inline __must_check bool __refcount_dec_and_test(refcount_t *r, int *oldp)
-{
-	return __refcount_sub_and_test(1, r, oldp);
-}
-
 static inline __must_check bool refcount_dec_and_test(refcount_t *r)
 {
 	return __refcount_dec_and_test(r, NULL);
 }
 
-/**
- * refcount_dec - decrement a refcount
- * @r: the refcount
- *
- * Similar to atomic_dec(), it will WARN on underflow and fail to decrement
- * when saturated at REFCOUNT_SATURATED.
- *
- * Provides release memory ordering, such that prior loads and stores are done
- * before.
- */
 static inline void __refcount_dec(refcount_t *r, int *oldp)
 {
 	int old = atomic_fetch_sub_release(1, &r->refs);
@@ -354,6 +344,16 @@ static inline void __refcount_dec(refcount_t *r, int *oldp)
 		refcount_warn_saturate(r, REFCOUNT_DEC_LEAK);
 }
 
+/**
+ * refcount_dec - decrement a refcount
+ * @r: the refcount
+ *
+ * Similar to atomic_dec(), it will WARN on underflow and fail to decrement
+ * when saturated at REFCOUNT_SATURATED.
+ *
+ * Provides release memory ordering, such that prior loads and stores are done
+ * before.
+ */
 static inline void refcount_dec(refcount_t *r)
 {
 	__refcount_dec(r, NULL);
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 36c47e7e66a2..6f70572b2938 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -19,12 +19,6 @@ struct scatterlist {
 };
 
 /*
- * Since the above length field is an unsigned int, below we define the maximum
- * length in bytes that can be stored in one scatterlist entry.
- */
-#define SCATTERLIST_MAX_SEGMENT (UINT_MAX & PAGE_MASK)
-
-/*
  * These macros should be used after a dma_map_sg call has been done
  * to get bus addresses of each of the SG entries and their lengths.
  * You should only work with the number of sg entries dma_map_sg
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 813614d4b71f..b83b3ae3c877 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -107,6 +107,7 @@ void seq_pad(struct seq_file *m, char c);
 char *mangle_path(char *s, const char *p, const char *esc);
 int seq_open(struct file *, const struct seq_operations *);
 ssize_t seq_read(struct file *, char __user *, size_t, loff_t *);
+ssize_t seq_read_iter(struct kiocb *iocb, struct iov_iter *iter);
 loff_t seq_lseek(struct file *, loff_t, int);
 int seq_release(struct inode *, struct file *);
 int seq_write(struct seq_file *seq, const void *data, size_t len);