sunrpc: remove dead codes of cr_magic in rpc_cred

Don't found any place using the cr_magic.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

include/linux/sunrpc/auth.h

@@ -64,9 +64,6 @@ struct rpc_cred {
 	struct rcu_head		cr_rcu;
 	struct rpc_auth *	cr_auth;
 	const struct rpc_credops *cr_ops;
-#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
-	unsigned long		cr_magic;	/* 0x0f4aa4f0 */
-#endif
 	unsigned long		cr_expire;	/* when to gc */
 	unsigned long		cr_flags;	/* various flags */
 	atomic_t		cr_count;	/* ref count */
@@ -80,8 +77,6 @@ struct rpc_cred {
 #define RPCAUTH_CRED_HASHED	2
 #define RPCAUTH_CRED_NEGATIVE	3
 
-#define RPCAUTH_CRED_MAGIC	0x0f4aa4f0
-
 /* rpc_auth au_flags */
 #define RPCAUTH_AUTH_NO_CRKEY_TIMEOUT	0x0001 /* underlying cred has no key timeout */
 

net/sunrpc/auth.c

@@ -648,9 +648,6 @@ rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred,
 	cred->cr_auth = auth;
 	cred->cr_ops = ops;
 	cred->cr_expire = jiffies;
-#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
-	cred->cr_magic = RPCAUTH_CRED_MAGIC;
-#endif
 	cred->cr_uid = acred->uid;
 }
 EXPORT_SYMBOL_GPL(rpcauth_init_cred);

net/sunrpc/auth_null.c

@@ -139,7 +139,4 @@ struct rpc_cred null_cred = {
 	.cr_ops		= &null_credops,
 	.cr_count	= ATOMIC_INIT(1),
 	.cr_flags	= 1UL << RPCAUTH_CRED_UPTODATE,
-#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
-	.cr_magic	= RPCAUTH_CRED_MAGIC,
-#endif
 };