Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index bf39d9c..a87fe85 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -58,7 +58,8 @@
 	struct nfs_subversion *	cl_nfs_mod;	/* pointer to nfs version module */
 
 	u32			cl_minorversion;/* NFSv4 minorversion */
-	struct rpc_cred		*cl_machine_cred;
+	unsigned int		cl_nconnect;	/* Number of connections */
+	const char *		cl_principal;  /* used for machine cred */
 
 #if IS_ENABLED(CONFIG_NFS_V4)
 	struct list_head	cl_ds_clients; /* auth flavor data servers */
@@ -139,6 +140,16 @@
 	struct nfs_iostats __percpu *io_stats;	/* I/O statistics */
 	atomic_long_t		writeback;	/* number of writeback pages */
 	int			flags;		/* various flags */
+
+/* The following are for internal use only. Also see uapi/linux/nfs_mount.h */
+#define NFS_MOUNT_LOOKUP_CACHE_NONEG	0x10000
+#define NFS_MOUNT_LOOKUP_CACHE_NONE	0x20000
+#define NFS_MOUNT_NORESVPORT		0x40000
+#define NFS_MOUNT_LEGACY_INTERFACE	0x80000
+#define NFS_MOUNT_LOCAL_FLOCK		0x100000
+#define NFS_MOUNT_LOCAL_FCNTL		0x200000
+#define NFS_MOUNT_SOFTERR		0x400000
+
 	unsigned int		caps;		/* server capabilities */
 	unsigned int		rsize;		/* read size */
 	unsigned int		rpages;		/* read size (in pages) */
@@ -228,6 +239,12 @@
 	unsigned short		mountd_port;
 	unsigned short		mountd_protocol;
 	struct rpc_wait_queue	uoc_rpcwaitq;
+
+	/* XDR related information */
+	unsigned int		read_hdrsize;
+
+	/* User namespace info */
+	const struct cred	*cred;
 };
 
 /* Server capabilities */
@@ -258,5 +275,6 @@
 #define NFS_CAP_CLONE		(1U << 23)
 #define NFS_CAP_COPY		(1U << 24)
 #define NFS_CAP_OFFLOAD_CANCEL	(1U << 25)
+#define NFS_CAP_LAYOUTERROR	(1U << 26)
 
 #endif