include/linux/dcache.h

89 	struct inode *d_inode;		/* Where the name belongs to - NULL is
466  * doesn't map to an inode (ie. ->d_inode is NULL).  The dentry could represent
472  * dentries.  (2) It should also be used in combination with d_inode() to get
478 	return dentry->d_inode == NULL;
486  * (ie. ->d_inode is not NULL).  The dentry might still represent a whiteout if
491  * dentries.  (2) It should also be used in combination with d_inode() to get
496 	return dentry->d_inode != NULL;
512  * d_inode - Get the actual inode of this dentry
518 static inline struct inode *d_inode(const struct dentry *dentry)
520 	return dentry->d_inode;
532 	return READ_ONCE(dentry->d_inode);
547 	struct inode *inode = upper->d_inode;
575  * Otherwise return d_inode().
580 	return d_inode(d_real((struct dentry *) dentry, D_REAL_DATA));