diff options
Diffstat (limited to 'fs/configfs/inode.c')
| -rw-r--r-- | fs/configfs/inode.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index 5d349d38e05..4921e7426d9 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -33,10 +33,15 @@ #include <linux/backing-dev.h> #include <linux/capability.h> #include <linux/sched.h> +#include <linux/lockdep.h> #include <linux/configfs.h> #include "configfs_internal.h" +#ifdef CONFIG_LOCKDEP +static struct lock_class_key default_group_class[MAX_LOCK_DEPTH]; +#endif + extern struct super_block * configfs_sb; static const struct address_space_operations configfs_aops = { @@ -150,6 +155,38 @@ struct inode * configfs_new_inode(mode_t mode, struct configfs_dirent * sd) return inode; } +#ifdef CONFIG_LOCKDEP + +static void configfs_set_inode_lock_class(struct configfs_dirent *sd, + struct inode *inode) +{ + int depth = sd->s_depth; + + if (depth > 0) { + if (depth <= ARRAY_SIZE(default_group_class)) { + lockdep_set_class(&inode->i_mutex, + &default_group_class[depth - 1]); + } else { + /* + * In practice the maximum level of locking depth is + * already reached. Just inform about possible reasons. + */ + printk(KERN_INFO "configfs: Too many levels of inodes" + " for the locking correctness validator.\n"); + printk(KERN_INFO "Spurious warnings may appear.\n"); + } + } +} + +#else /* CONFIG_LOCKDEP */ + +static void configfs_set_inode_lock_class(struct configfs_dirent *sd, + struct inode *inode) +{ +} + +#endif /* CONFIG_LOCKDEP */ + int configfs_create(struct dentry * dentry, int mode, int (*init)(struct inode *)) { int error = 0; @@ -162,6 +199,7 @@ int configfs_create(struct dentry * dentry, int mode, int (*init)(struct inode * struct inode *p_inode = dentry->d_parent->d_inode; p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME; } + configfs_set_inode_lock_class(sd, inode); goto Proceed; } else |