[PATCH] don't bother with aux entires for dummy context

Signed-off-by: Al Viro <[e-mail]>

fs/namei.c

···
 #ifdef CONFIG_AUDITSYSCALL
 void putname(const char *name)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		audit_putname(name);
 	else
 		__putname(name);
···
 	retval = link_path_walk(name, nd);
 out:
 	if (likely(retval == 0)) {
-		if (unlikely(current->audit_context && nd && nd->dentry &&
+		if (unlikely(!audit_dummy_context() && nd && nd->dentry &&
 				nd->dentry->d_inode))
 		audit_inode(name, nd->dentry->d_inode);
 	}

include/linux/audit.h

···
 }
 static inline void audit_getname(const char *name)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		__audit_getname(name);
 }
 static inline void audit_inode(const char *name, const struct inode *inode) {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		__audit_inode(name, inode);
 }
 static inline void audit_inode_child(const char *dname, 
 				     const struct inode *inode,
 				     const struct inode *parent) {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		__audit_inode_child(dname, inode, parent);
 }
 static inline void audit_inode_update(const struct inode *inode) {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		__audit_inode_update(inode);
 }
 
···
 
 static inline int audit_ipc_obj(struct kern_ipc_perm *ipcp)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		return __audit_ipc_obj(ipcp);
 	return 0;
 }
 static inline int audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		return __audit_ipc_set_perm(qbytes, uid, gid, mode);
 	return 0;
 }
 static inline int audit_mq_open(int oflag, mode_t mode, struct mq_attr __user *u_attr)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		return __audit_mq_open(oflag, mode, u_attr);
 	return 0;
 }
 static inline int audit_mq_timedsend(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec __user *u_abs_timeout)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		return __audit_mq_timedsend(mqdes, msg_len, msg_prio, u_abs_timeout);
 	return 0;
 }
 static inline int audit_mq_timedreceive(mqd_t mqdes, size_t msg_len, unsigned int __user *u_msg_prio, const struct timespec __user *u_abs_timeout)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		return __audit_mq_timedreceive(mqdes, msg_len, u_msg_prio, u_abs_timeout);
 	return 0;
 }
 static inline int audit_mq_notify(mqd_t mqdes, const struct sigevent __user *u_notification)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		return __audit_mq_notify(mqdes, u_notification);
 	return 0;
 }
 static inline int audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
 {
-	if (unlikely(current->audit_context))
+	if (unlikely(!audit_dummy_context()))
 		return __audit_mq_getsetattr(mqdes, mqstat);
 	return 0;
 }

kernel/auditsc.c

···
 	unsigned long p, next;
 	void *to;
 
-	if (likely(!audit_enabled || !context))
+	if (likely(!audit_enabled || !context || context->dummy))
 		return 0;
 
 	ax = kmalloc(sizeof(*ax) + PAGE_SIZE * MAX_ARG_PAGES - bprm->p,
···
 	struct audit_aux_data_socketcall *ax;
 	struct audit_context *context = current->audit_context;
 
-	if (likely(!context))
+	if (likely(!context || context->dummy))
 		return 0;
 
 	ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL);
···
 	struct audit_aux_data_sockaddr *ax;
 	struct audit_context *context = current->audit_context;
 
-	if (likely(!context))
+	if (likely(!context || context->dummy))
 		return 0;
 
 	ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL);