Merge branch 'nfsd-5.8' of git://linux-nfs.org/~cel/cel-2.6 into for-5.8-incoming

Highlights of this series:
* Remove serialization of sending RPC/RDMA Replies
* Convert the TCP socket send path to use xdr_buf::bvecs (pre-requisite for
RPC-on-TLS)
* Fix svcrdma backchannel sendto return code
* Convert a number of dprintk call sites to use tracepoints
* Fix the "suggest braces around empty body in an 'else' statement" warning

9 files changed, 107 insertions, 25 deletions

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 7bbf1b65be10..f9b7fdd951e4 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -73,7 +73,7 @@ struct bpf_insn {
 /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
 struct bpf_lpm_trie_key {
 	__u32	prefixlen;	/* up to 32 for AF_INET, 128 for AF_INET6 */
-	__u8	data[];	/* Arbitrary size */
+	__u8	data[0];	/* Arbitrary size */
 };
 
 struct bpf_cgroup_storage_key {
diff --git a/include/uapi/linux/dlm_device.h b/include/uapi/linux/dlm_device.h
index e83954c69fff..f880d2831160 100644
--- a/include/uapi/linux/dlm_device.h
+++ b/include/uapi/linux/dlm_device.h
@@ -45,13 +45,13 @@ struct dlm_lock_params {
 	void __user *bastaddr;
 	struct dlm_lksb __user *lksb;
 	char lvb[DLM_USER_LVB_LEN];
-	char name[];
+	char name[0];
 };
 
 struct dlm_lspace_params {
 	__u32 flags;
 	__u32 minor;
-	char name[];
+	char name[0];
 };
 
 struct dlm_purge_params {
diff --git a/include/uapi/linux/fiemap.h b/include/uapi/linux/fiemap.h
index 7a900b2377b6..8c0bc24d5d95 100644
--- a/include/uapi/linux/fiemap.h
+++ b/include/uapi/linux/fiemap.h
@@ -34,7 +34,7 @@ struct fiemap {
 	__u32 fm_mapped_extents;/* number of extents that were mapped (out) */
 	__u32 fm_extent_count;  /* size of fm_extents array (in) */
 	__u32 fm_reserved;
-	struct fiemap_extent fm_extents[]; /* array of mapped extents (out) */
+	struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
 };
 
 #define FIEMAP_MAX_OFFSET	(~0ULL)
diff --git a/include/uapi/linux/if_arcnet.h b/include/uapi/linux/if_arcnet.h
index b122cfac7128..683878036d76 100644
--- a/include/uapi/linux/if_arcnet.h
+++ b/include/uapi/linux/if_arcnet.h
@@ -60,7 +60,7 @@ struct arc_rfc1201 {
 	__u8  proto;		/* protocol ID field - varies		*/
 	__u8  split_flag;	/* for use with split packets		*/
 	__be16   sequence;	/* sequence number			*/
-	__u8  payload[];	/* space remaining in packet (504 bytes)*/
+	__u8  payload[0];	/* space remaining in packet (504 bytes)*/
 };
 #define RFC1201_HDR_SIZE 4
 
@@ -69,7 +69,7 @@ struct arc_rfc1201 {
  */
 struct arc_rfc1051 {
 	__u8 proto;		/* ARC_P_RFC1051_ARP/RFC1051_IP	*/
-	__u8 payload[];	/* 507 bytes			*/
+	__u8 payload[0];	/* 507 bytes			*/
 };
 #define RFC1051_HDR_SIZE 1
 
@@ -80,7 +80,7 @@ struct arc_rfc1051 {
 struct arc_eth_encap {
 	__u8 proto;		/* Always ARC_P_ETHER			*/
 	struct ethhdr eth;	/* standard ethernet header (yuck!)	*/
-	__u8 payload[];	/* 493 bytes				*/
+	__u8 payload[0];	/* 493 bytes				*/
 };
 #define ETH_ENCAP_HDR_SIZE 14
 
diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h
index 98e29e7f54ac..00c08120f3ba 100644
--- a/include/uapi/linux/mmc/ioctl.h
+++ b/include/uapi/linux/mmc/ioctl.h
@@ -57,7 +57,7 @@ struct mmc_ioc_cmd {
  */
 struct mmc_ioc_multi_cmd {
 	__u64 num_of_cmds;
-	struct mmc_ioc_cmd cmds[];
+	struct mmc_ioc_cmd cmds[0];
 };
 
 #define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
diff --git a/include/uapi/linux/net_dropmon.h b/include/uapi/linux/net_dropmon.h
index 67e31f329190..66048cc5d7b3 100644
--- a/include/uapi/linux/net_dropmon.h
+++ b/include/uapi/linux/net_dropmon.h
@@ -29,12 +29,12 @@ struct net_dm_config_entry {
 
 struct net_dm_config_msg {
 	__u32 entries;
-	struct net_dm_config_entry options[];
+	struct net_dm_config_entry options[0];
 };
 
 struct net_dm_alert_msg {
 	__u32 entries;
-	struct net_dm_drop_point points[];
+	struct net_dm_drop_point points[0];
 };
 
 struct net_dm_user_msg {
diff --git a/include/uapi/linux/netfilter_bridge/ebt_among.h b/include/uapi/linux/netfilter_bridge/ebt_among.h
index 73b26a280c4f..9acf757bc1f7 100644
--- a/include/uapi/linux/netfilter_bridge/ebt_among.h
+++ b/include/uapi/linux/netfilter_bridge/ebt_among.h
@@ -40,7 +40,7 @@ struct ebt_mac_wormhash_tuple {
 struct ebt_mac_wormhash {
 	int table[257];
 	int poolsize;
-	struct ebt_mac_wormhash_tuple pool[];
+	struct ebt_mac_wormhash_tuple pool[0];
 };
 
 #define ebt_mac_wormhash_size(x) ((x) ? sizeof(struct ebt_mac_wormhash) \
diff --git a/include/uapi/linux/usb/raw_gadget.h b/include/uapi/linux/usb/raw_gadget.h
index ea375082b3ac..0be685272eb1 100644
--- a/include/uapi/linux/usb/raw_gadget.h
+++ b/include/uapi/linux/usb/raw_gadget.h
@@ -93,6 +93,64 @@ struct usb_raw_ep_io {
 	__u8		data[0];
 };
 
+/* Maximum number of non-control endpoints in struct usb_raw_eps_info. */
+#define USB_RAW_EPS_NUM_MAX	30
+
+/* Maximum length of UDC endpoint name in struct usb_raw_ep_info. */
+#define USB_RAW_EP_NAME_MAX	16
+
+/* Used as addr in struct usb_raw_ep_info if endpoint accepts any address. */
+#define USB_RAW_EP_ADDR_ANY	0xff
+
+/*
+ * struct usb_raw_ep_caps - exposes endpoint capabilities from struct usb_ep
+ *     (technically from its member struct usb_ep_caps).
+ */
+struct usb_raw_ep_caps {
+	__u32	type_control	: 1;
+	__u32	type_iso	: 1;
+	__u32	type_bulk	: 1;
+	__u32	type_int	: 1;
+	__u32	dir_in		: 1;
+	__u32	dir_out		: 1;
+};
+
+/*
+ * struct usb_raw_ep_limits - exposes endpoint limits from struct usb_ep.
+ * @maxpacket_limit: Maximum packet size value supported by this endpoint.
+ * @max_streams: maximum number of streams supported by this endpoint
+ *     (actual number is 2^n).
+ * @reserved: Empty, reserved for potential future extensions.
+ */
+struct usb_raw_ep_limits {
+	__u16	maxpacket_limit;
+	__u16	max_streams;
+	__u32	reserved;
+};
+
+/*
+ * struct usb_raw_ep_info - stores information about a gadget endpoint.
+ * @name: Name of the endpoint as it is defined in the UDC driver.
+ * @addr: Address of the endpoint that must be specified in the endpoint
+ *     descriptor passed to USB_RAW_IOCTL_EP_ENABLE ioctl.
+ * @caps: Endpoint capabilities.
+ * @limits: Endpoint limits.
+ */
+struct usb_raw_ep_info {
+	__u8				name[USB_RAW_EP_NAME_MAX];
+	__u32				addr;
+	struct usb_raw_ep_caps		caps;
+	struct usb_raw_ep_limits	limits;
+};
+
+/*
+ * struct usb_raw_eps_info - argument for USB_RAW_IOCTL_EPS_INFO ioctl.
+ * eps: Structures that store information about non-control endpoints.
+ */
+struct usb_raw_eps_info {
+	struct usb_raw_ep_info	eps[USB_RAW_EPS_NUM_MAX];
+};
+
 /*
  * Initializes a Raw Gadget instance.
  * Accepts a pointer to the usb_raw_init struct as an argument.
@@ -115,37 +173,38 @@ struct usb_raw_ep_io {
 #define USB_RAW_IOCTL_EVENT_FETCH	_IOR('U', 2, struct usb_raw_event)
 
 /*
- * Queues an IN (OUT for READ) urb as a response to the last control request
- * received on endpoint 0, provided that was an IN (OUT for READ) request and
- * waits until the urb is completed. Copies received data to user for READ.
+ * Queues an IN (OUT for READ) request as a response to the last setup request
+ * received on endpoint 0 (provided that was an IN (OUT for READ) request), and
+ * waits until the request is completed. Copies received data to user for READ.
  * Accepts a pointer to the usb_raw_ep_io struct as an argument.
- * Returns length of trasferred data on success or negative error code on
+ * Returns length of transferred data on success or negative error code on
  * failure.
  */
 #define USB_RAW_IOCTL_EP0_WRITE		_IOW('U', 3, struct usb_raw_ep_io)
 #define USB_RAW_IOCTL_EP0_READ		_IOWR('U', 4, struct usb_raw_ep_io)
 
 /*
- * Finds an endpoint that supports the transfer type specified in the
- * descriptor and enables it.
- * Accepts a pointer to the usb_endpoint_descriptor struct as an argument.
+ * Finds an endpoint that satisfies the parameters specified in the provided
+ * descriptors (address, transfer type, etc.) and enables it.
+ * Accepts a pointer to the usb_raw_ep_descs struct as an argument.
  * Returns enabled endpoint handle on success or negative error code on failure.
  */
 #define USB_RAW_IOCTL_EP_ENABLE		_IOW('U', 5, struct usb_endpoint_descriptor)
 
-/* Disables specified endpoint.
+/*
+ * Disables specified endpoint.
  * Accepts endpoint handle as an argument.
  * Returns 0 on success or negative error code on failure.
  */
 #define USB_RAW_IOCTL_EP_DISABLE	_IOW('U', 6, __u32)
 
 /*
- * Queues an IN (OUT for READ) urb as a response to the last control request
- * received on endpoint usb_raw_ep_io.ep, provided that was an IN (OUT for READ)
- * request and waits until the urb is completed. Copies received data to user
- * for READ.
+ * Queues an IN (OUT for READ) request as a response to the last setup request
+ * received on endpoint usb_raw_ep_io.ep (provided that was an IN (OUT for READ)
+ * request), and waits until the request is completed. Copies received data to
+ * user for READ.
  * Accepts a pointer to the usb_raw_ep_io struct as an argument.
- * Returns length of trasferred data on success or negative error code on
+ * Returns length of transferred data on success or negative error code on
  * failure.
  */
 #define USB_RAW_IOCTL_EP_WRITE		_IOW('U', 7, struct usb_raw_ep_io)
@@ -164,4 +223,27 @@ struct usb_raw_ep_io {
  */
 #define USB_RAW_IOCTL_VBUS_DRAW		_IOW('U', 10, __u32)
 
+/*
+ * Fills in the usb_raw_eps_info structure with information about non-control
+ * endpoints available for the currently connected UDC.
+ * Returns the number of available endpoints on success or negative error code
+ * on failure.
+ */
+#define USB_RAW_IOCTL_EPS_INFO		_IOR('U', 11, struct usb_raw_eps_info)
+
+/*
+ * Stalls a pending control request on endpoint 0.
+ * Returns 0 on success or negative error code on failure.
+ */
+#define USB_RAW_IOCTL_EP0_STALL		_IO('U', 12)
+
+/*
+ * Sets or clears halt or wedge status of the endpoint.
+ * Accepts endpoint handle as an argument.
+ * Returns 0 on success or negative error code on failure.
+ */
+#define USB_RAW_IOCTL_EP_SET_HALT	_IOW('U', 13, __u32)
+#define USB_RAW_IOCTL_EP_CLEAR_HALT	_IOW('U', 14, __u32)
+#define USB_RAW_IOCTL_EP_SET_WEDGE	_IOW('U', 15, __u32)
+
 #endif /* _UAPI__LINUX_USB_RAW_GADGET_H */
diff --git a/include/uapi/scsi/scsi_bsg_fc.h b/include/uapi/scsi/scsi_bsg_fc.h
index 7f5930801f72..3ae65e93235c 100644
--- a/include/uapi/scsi/scsi_bsg_fc.h
+++ b/include/uapi/scsi/scsi_bsg_fc.h
@@ -209,7 +209,7 @@ struct fc_bsg_host_vendor {
 	__u64 vendor_id;
 
 	/* start of vendor command area */
-	__u32 vendor_cmd[];
+	__u32 vendor_cmd[0];
 };
 
 /* Response: