namei: fix kernel-doc for struct renamedata and more

Fix kernel-doc warnings in namei.c:

../fs/namei.c:1149: warning: Excess function parameter 'dir_mode' description in 'may_create_in_sticky'
../fs/namei.c:1149: warning: Excess function parameter 'dir_uid' description in 'may_create_in_sticky'
../fs/namei.c:3396: warning: Function parameter or member 'open_flag' not described in 'vfs_tmpfile'
../fs/namei.c:3396: warning: Excess function parameter 'open_flags' description in 'vfs_tmpfile'
../fs/namei.c:4460: warning: Function parameter or member 'rd' not described in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'old_mnt_userns' description in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'old_dir' description in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'old_dentry' description in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'new_mnt_userns' description in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'new_dir' description in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'new_dentry' description in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'delegated_inode' description in 'vfs_rename'
../fs/namei.c:4460: warning: Excess function parameter 'flags' description in 'vfs_rename'

Link: https://lore.kernel.org/r/20210216042929.8931-3-rdunlap@infradead.org
Fixes: 9fe6145 ("namei: introduce struct renamedata")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Author: rddunlap

fs/namei.c

@@ -1122,8 +1122,7 @@ int may_linkat(struct user_namespace *mnt_userns, struct path *link)
  *			  should be allowed, or not, on files that already
  *			  exist.
  * @mnt_userns:	user namespace of the mount the inode was found from
- * @dir_mode: mode bits of directory
- * @dir_uid: owner of directory
+ * @nd: nameidata pathwalk data
  * @inode: the inode of the file to open
  *
  * Block an O_CREAT open of a FIFO (or a regular file) when:
@@ -3381,7 +3380,7 @@ static int do_open(struct nameidata *nd,
  * @mnt_userns:	user namespace of the mount the inode was found from
  * @dentry:	pointer to dentry of the base directory
  * @mode:	mode of the new tmpfile
- * @open_flags:	flags
+ * @open_flag:	flags
  *
  * Create a temporary file.
  *
@@ -4406,14 +4405,7 @@ SYSCALL_DEFINE2(link, const char __user *, oldname, const char __user *, newname
 
 /**
  * vfs_rename - rename a filesystem object
- * @old_mnt_userns:	old user namespace of the mount the inode was found from
- * @old_dir:		parent of source
- * @old_dentry:		source
- * @new_mnt_userns:	new user namespace of the mount the inode was found from
- * @new_dir:		parent of destination
- * @new_dentry:		destination
- * @delegated_inode:	returns an inode needing a delegation break
- * @flags:		rename flags
+ * @rd:		pointer to &struct renamedata info
  *
  * The caller must hold multiple mutexes--see lock_rename()).
  *