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4b6f5d20b0
This is a conversion to make the various file_operations structs in fs/ const. Basically a regexp job, with a few manual fixups The goal is both to increase correctness (harder to accidentally write to shared datastructures) and reducing the false sharing of cachelines with things that get dirty in .data (while .rodata is nicely read only and thus cache clean) Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
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extern struct vfsmount * sysfs_mount;
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extern kmem_cache_t *sysfs_dir_cachep;
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extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
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extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
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extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
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extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
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umode_t, int);
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extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
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extern void sysfs_hash_and_remove(struct dentry * dir, const char * name);
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extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
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extern void sysfs_remove_subdir(struct dentry *);
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extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
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extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
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extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
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extern struct rw_semaphore sysfs_rename_sem;
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extern struct super_block * sysfs_sb;
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extern const struct file_operations sysfs_dir_operations;
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extern const struct file_operations sysfs_file_operations;
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extern const struct file_operations bin_fops;
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extern struct inode_operations sysfs_dir_inode_operations;
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extern struct inode_operations sysfs_symlink_inode_operations;
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struct sysfs_symlink {
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char * link_name;
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struct kobject * target_kobj;
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};
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static inline struct kobject * to_kobj(struct dentry * dentry)
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{
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struct sysfs_dirent * sd = dentry->d_fsdata;
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return ((struct kobject *) sd->s_element);
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}
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static inline struct attribute * to_attr(struct dentry * dentry)
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{
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struct sysfs_dirent * sd = dentry->d_fsdata;
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return ((struct attribute *) sd->s_element);
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}
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static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
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{
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struct sysfs_dirent * sd = dentry->d_fsdata;
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return ((struct bin_attribute *) sd->s_element);
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}
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static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
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{
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struct kobject * kobj = NULL;
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spin_lock(&dcache_lock);
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if (!d_unhashed(dentry)) {
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struct sysfs_dirent * sd = dentry->d_fsdata;
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if (sd->s_type & SYSFS_KOBJ_LINK) {
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struct sysfs_symlink * sl = sd->s_element;
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kobj = kobject_get(sl->target_kobj);
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} else
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kobj = kobject_get(sd->s_element);
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}
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spin_unlock(&dcache_lock);
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return kobj;
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}
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static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
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{
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if (sd->s_type & SYSFS_KOBJ_LINK) {
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struct sysfs_symlink * sl = sd->s_element;
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kfree(sl->link_name);
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kobject_put(sl->target_kobj);
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kfree(sl);
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}
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kfree(sd->s_iattr);
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kmem_cache_free(sysfs_dir_cachep, sd);
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}
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static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
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{
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if (sd) {
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WARN_ON(!atomic_read(&sd->s_count));
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atomic_inc(&sd->s_count);
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}
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return sd;
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}
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static inline void sysfs_put(struct sysfs_dirent * sd)
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{
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if (atomic_dec_and_test(&sd->s_count))
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release_sysfs_dirent(sd);
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}
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