lsm: move the binder hook comments to security/security.c

This patch relocates the LSM hook function comments to the function
definitions, in keeping with the current kernel conventions.  This
should make the hook descriptions more easily discoverable and easier
to maintain.

While formatting changes have been done to better fit the kernel-doc
style, content changes have been kept to a minimum and limited to
text which was obviously incorrect and/or outdated.  It is expected
the future patches will improve the quality of the function header
comments.

Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/security.c

@@ -779,23 +779,59 @@ static int lsm_superblock_alloc(struct super_block *sb)
 
 /* Security operations */
 
+/**
+ * security_binder_set_context_mgr() - Check if becoming binder ctx mgr is ok
+ * @mgr: task credentials of current binder process
+ *
+ * Check whether @mgr is allowed to be the binder context manager.
+ *
+ * Return: Return 0 if permission is granted.
+ */
 int security_binder_set_context_mgr(const struct cred *mgr)
 {
 	return call_int_hook(binder_set_context_mgr, 0, mgr);
 }
 
+/**
+ * security_binder_transaction() - Check if a binder transaction is allowed
+ * @from: sending process
+ * @to: receiving process
+ *
+ * Check whether @from is allowed to invoke a binder transaction call to @to.
+ *
+ * Return: Returns 0 if permission is granted.
+ */
 int security_binder_transaction(const struct cred *from,
 				const struct cred *to)
 {
 	return call_int_hook(binder_transaction, 0, from, to);
 }
 
+/**
+ * security_binder_transfer_binder() - Check if a binder transfer is allowed
+ * @from: sending process
+ * @to: receiving process
+ *
+ * Check whether @from is allowed to transfer a binder reference to @to.
+ *
+ * Return: Returns 0 if permission is granted.
+ */
 int security_binder_transfer_binder(const struct cred *from,
 				    const struct cred *to)
 {
 	return call_int_hook(binder_transfer_binder, 0, from, to);
 }
 
+/**
+ * security_binder_transfer_file() - Check if a binder file xfer is allowed
+ * @from: sending process
+ * @to: receiving process
+ * @file: file being transferred
+ *
+ * Check whether @from is allowed to transfer @file to @to.
+ *
+ * Return: Returns 0 if permission is granted.
+ */
 int security_binder_transfer_file(const struct cred *from,
 				  const struct cred *to, struct file *file)
 {