d_really_is_negative — Determine if a dentry is really negative (ignoring fallthroughs)
|const struct dentry * dentry|
Returns true if the dentry represents either an absent name or a name that doesn't map to an inode (ie. ->d_inode is NULL). The dentry could represent a true miss, a whiteout that isn't represented by a 0,0 chardev or a fallthrough marker in an opaque directory.
Note! (1) This should be used *only* by a filesystem to examine its own
dentries. It should not be used to look at some other filesystem's
dentries. (2) It should also be used in combination with
d_inode to get
the inode. (3) The dentry may have something attached to ->d_lower and the
type field of the flags may be set to something other than miss or whiteout.