9 files changed, 57 insertions, 17 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index d5379548d684..818e93612947 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -731,6 +731,7 @@ static inline bool bioset_initialized(struct bio_set *bs)
 		bip_for_each_vec(_bvl, _bio->bi_integrity, _iter)
 
 int bio_integrity_map_user(struct bio *bio, void __user *ubuf, ssize_t len, u32 seed);
+void bio_integrity_unmap_free_user(struct bio *bio);
 extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int);
 extern int bio_integrity_add_page(struct bio *, struct page *, unsigned int, unsigned int);
 extern bool bio_integrity_prep(struct bio *);
@@ -807,6 +808,9 @@ static inline int bio_integrity_map_user(struct bio *bio, void __user *ubuf,
 {
 	return -EINVAL;
 }
+static inline void bio_integrity_unmap_free_user(struct bio *bio)
+{
+}
 
 #endif /* CONFIG_BLK_DEV_INTEGRITY */
 
diff --git a/include/linux/device.h b/include/linux/device.h
index fc3bd7116ab9..ace039151cb8 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1220,8 +1220,6 @@ static inline void device_remove_group(struct device *dev,
 	return device_remove_groups(dev, groups);
 }
 
-int __must_check devm_device_add_groups(struct device *dev,
-					const struct attribute_group **groups);
 int __must_check devm_device_add_group(struct device *dev,
 				       const struct attribute_group *grp);
 
diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h
index 7a6b190c7da7..b48570eaa449 100644
--- a/include/linux/io_uring_types.h
+++ b/include/linux/io_uring_types.h
@@ -648,7 +648,7 @@ struct io_kiocb {
 	struct io_rsrc_node		*rsrc_node;
 
 	atomic_t			refs;
-	atomic_t			poll_refs;
+	bool				cancel_seq_set;
 	struct io_task_work		io_task_work;
 	/* for polled requests, i.e. IORING_OP_POLL_ADD and async armed poll */
 	struct hlist_node		hash_node;
@@ -657,6 +657,7 @@ struct io_kiocb {
 	/* opcode allocated if it needs to store data for async defer */
 	void				*async_data;
 	/* linked requests, IFF REQ_F_HARDLINK or REQ_F_LINK are set */
+	atomic_t			poll_refs;
 	struct io_kiocb			*link;
 	/* custom credentials, valid IFF REQ_F_CREDS is set */
 	const struct cred		*creds;
diff --git a/include/linux/kcov.h b/include/linux/kcov.h
index b851ba415e03..1068a7318d89 100644
--- a/include/linux/kcov.h
+++ b/include/linux/kcov.h
@@ -55,21 +55,47 @@ static inline void kcov_remote_start_usb(u64 id)
 
 /*
  * The softirq flavor of kcov_remote_*() functions is introduced as a temporary
- * work around for kcov's lack of nested remote coverage sections support in
- * task context. Adding support for nested sections is tracked in:
- * https://bugzilla.kernel.org/show_bug.cgi?id=210337
+ * workaround for KCOV's lack of nested remote coverage sections support.
+ *
+ * Adding support is tracked in https://bugzilla.kernel.org/show_bug.cgi?id=210337.
+ *
+ * kcov_remote_start_usb_softirq():
+ *
+ * 1. Only collects coverage when called in the softirq context. This allows
+ *    avoiding nested remote coverage collection sections in the task context.
+ *    For example, USB/IP calls usb_hcd_giveback_urb() in the task context
+ *    within an existing remote coverage collection section. Thus, KCOV should
+ *    not attempt to start collecting coverage within the coverage collection
+ *    section in __usb_hcd_giveback_urb() in this case.
+ *
+ * 2. Disables interrupts for the duration of the coverage collection section.
+ *    This allows avoiding nested remote coverage collection sections in the
+ *    softirq context (a softirq might occur during the execution of a work in
+ *    the BH workqueue, which runs with in_serving_softirq() > 0).
+ *    For example, usb_giveback_urb_bh() runs in the BH workqueue with
+ *    interrupts enabled, so __usb_hcd_giveback_urb() might be interrupted in
+ *    the middle of its remote coverage collection section, and the interrupt
+ *    handler might invoke __usb_hcd_giveback_urb() again.
  */
 
-static inline void kcov_remote_start_usb_softirq(u64 id)
+static inline unsigned long kcov_remote_start_usb_softirq(u64 id)
 {
-	if (in_serving_softirq())
+	unsigned long flags = 0;
+
+	if (in_serving_softirq()) {
+		local_irq_save(flags);
 		kcov_remote_start_usb(id);
+	}
+
+	return flags;
 }
 
-static inline void kcov_remote_stop_softirq(void)
+static inline void kcov_remote_stop_softirq(unsigned long flags)
 {
-	if (in_serving_softirq())
+	if (in_serving_softirq()) {
 		kcov_remote_stop();
+		local_irq_restore(flags);
+	}
 }
 
 #ifdef CONFIG_64BIT
@@ -103,8 +129,11 @@ static inline u64 kcov_common_handle(void)
 }
 static inline void kcov_remote_start_common(u64 id) {}
 static inline void kcov_remote_start_usb(u64 id) {}
-static inline void kcov_remote_start_usb_softirq(u64 id) {}
-static inline void kcov_remote_stop_softirq(void) {}
+static inline unsigned long kcov_remote_start_usb_softirq(u64 id)
+{
+	return 0;
+}
+static inline void kcov_remote_stop_softirq(unsigned long flags) {}
 
 #endif /* CONFIG_KCOV */
 #endif /* _LINUX_KCOV_H */
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 3ca3906bb8da..5d0288938cc2 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -521,7 +521,7 @@ static inline struct fscache_cookie *netfs_i_cookie(struct netfs_inode *ctx)
 
 /**
  * netfs_wait_for_outstanding_io - Wait for outstanding I/O to complete
- * @ctx: The netfs inode to wait on
+ * @inode: The netfs inode to wait on
  *
  * Wait for outstanding I/O requests of any type to complete.  This is intended
  * to be called from inode eviction routines.  This makes sure that any
diff --git a/include/linux/pse-pd/pse.h b/include/linux/pse-pd/pse.h
index 6d07c95dabb9..6eec24ffa866 100644
--- a/include/linux/pse-pd/pse.h
+++ b/include/linux/pse-pd/pse.h
@@ -167,14 +167,14 @@ static inline int pse_ethtool_get_status(struct pse_control *psec,
 					 struct netlink_ext_ack *extack,
 					 struct pse_control_status *status)
 {
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 
 static inline int pse_ethtool_set_config(struct pse_control *psec,
 					 struct netlink_ext_ack *extack,
 					 const struct pse_control_config *config)
 {
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 
 static inline bool pse_has_podl(struct pse_control *psec)
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index a7d725fbf739..c4e64dc11206 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -750,6 +750,15 @@ static inline int sysfs_emit_at(char *buf, int at, const char *fmt, ...)
 {
 	return 0;
 }
+
+static inline ssize_t sysfs_bin_attr_simple_read(struct file *file,
+						 struct kobject *kobj,
+						 struct bin_attribute *attr,
+						 char *buf, loff_t off,
+						 size_t count)
+{
+	return 0;
+}
 #endif /* CONFIG_SYSFS */
 
 static inline int __must_check sysfs_create_file(struct kobject *kobj,
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 8b1a29820409..000a6cab2d31 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -64,6 +64,7 @@ struct vfio_device {
 	struct completion comp;
 	struct iommufd_access *iommufd_access;
 	void (*put_kvm)(struct kvm *kvm);
+	struct inode *inode;
 #if IS_ENABLED(CONFIG_IOMMUFD)
 	struct iommufd_device *iommufd_device;
 	u8 iommufd_attached:1;
diff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h
index a2c8b8bba711..f87067438ed4 100644
--- a/include/linux/vfio_pci_core.h
+++ b/include/linux/vfio_pci_core.h
@@ -93,8 +93,6 @@ struct vfio_pci_core_device {
 	struct list_head		sriov_pfs_item;
 	struct vfio_pci_core_device	*sriov_pf_core_dev;
 	struct notifier_block	nb;
-	struct mutex		vma_lock;
-	struct list_head	vma_list;
 	struct rw_semaphore	memory_lock;
 };