ecryptfs: ecryptfs_kernel.h: clean up kernel-doc comments

- don't use "/**" for non-kernel-doc comments
- use the struct keyword when describing structs
- delete one Excess struct member

to prevent the following warnings:

Warning: ./fs/ecryptfs/ecryptfs_kernel.h:14 cannot understand function
 prototype: 'ECRYPTFS_KERNEL_H'
Warning: ./fs/ecryptfs/ecryptfs_kernel.h:207 This comment starts with
 '/**', but isn't a kernel-doc comment.
 * This is the primary struct associated with each encrypted file.
Warning: ./fs/ecryptfs/ecryptfs_kernel.h:275 cannot understand function
 prototype: 'struct ecryptfs_global_auth_tok'
Warning: fs/ecryptfs/ecryptfs_kernel.h:283 Excess struct member
 'global_auth_tok' description in 'ecryptfs_global_auth_tok'
Warning: ./fs/ecryptfs/ecryptfs_kernel.h:298 cannot understand function
 prototype: 'struct ecryptfs_key_tfm'
Warning: ./fs/ecryptfs/ecryptfs_kernel.h:309 This comment starts with
 '/**', but isn't a kernel-doc comment.
 * This struct is to enable a mount-wide passphrase/salt combo. This

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Tyler Hicks <code@tyhicks.com>

fs/ecryptfs/ecryptfs_kernel.h

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
-/**
+/*
  * eCryptfs: Linux filesystem encryption layer
  * Kernel declarations.
  *
@@ -204,7 +204,7 @@ struct ecryptfs_filename {
 	char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
 };
 
-/**
+/*
  * This is the primary struct associated with each encrypted file.
  *
  * TODO: cache align/pack?
@@ -255,7 +255,8 @@ struct ecryptfs_inode_info {
 };
 
 /**
- * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint
+ * struct ecryptfs_global_auth_tok - A key used to encrypt all new files
+ *   under the mountpoint
  * @flags: Status flags
  * @mount_crypt_stat_list: These auth_toks hang off the mount-wide
  *                         cryptographic context. Every time a new
@@ -263,7 +264,6 @@ struct ecryptfs_inode_info {
  *                         the auth_toks on that list to the set of
  *                         auth_toks on the inode's crypt_stat
  * @global_auth_tok_key: The key from the user's keyring for the sig
- * @global_auth_tok: The key contents
  * @sig: The key identifier
  *
  * ecryptfs_global_auth_tok structs refer to authentication token keys
@@ -283,7 +283,7 @@ struct ecryptfs_global_auth_tok {
 };
 
 /**
- * ecryptfs_key_tfm - Persistent key tfm
+ * struct ecryptfs_key_tfm - Persistent key tfm
  * @key_tfm: crypto API handle to the key
  * @key_size: Key size in bytes
  * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is
@@ -306,7 +306,7 @@ struct ecryptfs_key_tfm {
 
 extern struct mutex key_tfm_list_mutex;
 
-/**
+/*
  * This struct is to enable a mount-wide passphrase/salt combo. This
  * is more or less a stopgap to provide similar functionality to other
  * crypto filesystems like EncFS or CFS until full policy support is