per-superblock default ->d_op

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 5 insertions, 0 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index 5699d4c027cb..5ec58267b5bb 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1320,6 +1320,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
                 __dget_dlock(parent);
                 dentry->d_parent = parent;
                 dentry->d_sb = parent->d_sb;
+                d_set_d_op(dentry, dentry->d_sb->s_d_op);
                 list_add(&dentry->d_u.d_child, &parent->d_subdirs);
                 spin_unlock(&parent->d_lock);
         }
@@ -1335,6 +1336,7 @@ struct dentry *d_alloc_pseudo(struct super_block *sb, const struct qstr *name)
         struct dentry *dentry = d_alloc(NULL, name);
         if (dentry) {
                 dentry->d_sb = sb;
+                d_set_d_op(dentry, dentry->d_sb->s_d_op);
                 dentry->d_parent = dentry;
                 dentry->d_flags |= DCACHE_DISCONNECTED;
         }
@@ -1507,6 +1509,7 @@ struct dentry * d_alloc_root(struct inode * root_inode)
                 res = d_alloc(NULL, &name);
                 if (res) {
                         res->d_sb = root_inode->i_sb;
+                        d_set_d_op(res, res->d_sb->s_d_op);
                         res->d_parent = res;
                         d_instantiate(res, root_inode);
                 }
@@ -1567,6 +1570,7 @@ struct dentry *d_obtain_alias(struct inode *inode)
         /* attach a disconnected dentry */
         spin_lock(&tmp->d_lock);
         tmp->d_sb = inode->i_sb;
+        d_set_d_op(tmp, tmp->d_sb->s_d_op);
         tmp->d_inode = inode;
         tmp->d_flags |= DCACHE_DISCONNECTED;
         list_add(&tmp->d_alias, &inode->i_dentry);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index f84d9928bdb1..3e4c27486e74 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1423,6 +1423,7 @@ struct super_block {
          * generic_show_options()
          */
         char __rcu *s_options;
+        const struct dentry_operations *s_d_op; /* default d_op for dentries */
 };
 
 extern struct timespec current_fs_time(struct super_block *sb);