struct file: use anonymous union member for rcuhead and llist
Once upon a time we couldn't afford anon unions; these days minimal gcc version had been raised enough to take care of that. Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -45,7 +45,7 @@ static struct percpu_counter nr_files __cacheline_aligned_in_smp;
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static void file_free_rcu(struct rcu_head *head)
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{
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struct file *f = container_of(head, struct file, f_u.fu_rcuhead);
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struct file *f = container_of(head, struct file, f_rcuhead);
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put_cred(f->f_cred);
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kmem_cache_free(filp_cachep, f);
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@ -56,7 +56,7 @@ static inline void file_free(struct file *f)
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security_file_free(f);
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if (!(f->f_mode & FMODE_NOACCOUNT))
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percpu_counter_dec(&nr_files);
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call_rcu(&f->f_u.fu_rcuhead, file_free_rcu);
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call_rcu(&f->f_rcuhead, file_free_rcu);
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}
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/*
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@ -142,7 +142,7 @@ static struct file *__alloc_file(int flags, const struct cred *cred)
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f->f_cred = get_cred(cred);
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error = security_file_alloc(f);
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if (unlikely(error)) {
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file_free_rcu(&f->f_u.fu_rcuhead);
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file_free_rcu(&f->f_rcuhead);
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return ERR_PTR(error);
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}
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@ -341,13 +341,13 @@ static void delayed_fput(struct work_struct *unused)
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struct llist_node *node = llist_del_all(&delayed_fput_list);
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struct file *f, *t;
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llist_for_each_entry_safe(f, t, node, f_u.fu_llist)
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llist_for_each_entry_safe(f, t, node, f_llist)
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__fput(f);
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}
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static void ____fput(struct callback_head *work)
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{
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__fput(container_of(work, struct file, f_u.fu_rcuhead));
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__fput(container_of(work, struct file, f_rcuhead));
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}
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/*
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@ -374,8 +374,8 @@ void fput(struct file *file)
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struct task_struct *task = current;
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if (likely(!in_interrupt() && !(task->flags & PF_KTHREAD))) {
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init_task_work(&file->f_u.fu_rcuhead, ____fput);
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if (!task_work_add(task, &file->f_u.fu_rcuhead, TWA_RESUME))
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init_task_work(&file->f_rcuhead, ____fput);
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if (!task_work_add(task, &file->f_rcuhead, TWA_RESUME))
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return;
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/*
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* After this task has run exit_task_work(),
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@ -384,7 +384,7 @@ void fput(struct file *file)
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*/
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}
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if (llist_add(&file->f_u.fu_llist, &delayed_fput_list))
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if (llist_add(&file->f_llist, &delayed_fput_list))
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schedule_delayed_work(&delayed_fput_work, 1);
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}
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}
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@ -924,9 +924,9 @@ static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index)
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struct file {
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union {
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struct llist_node fu_llist;
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struct rcu_head fu_rcuhead;
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} f_u;
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struct llist_node f_llist;
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struct rcu_head f_rcuhead;
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};
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struct path f_path;
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struct inode *f_inode; /* cached value */
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const struct file_operations *f_op;
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