suse man page for d_invalidate

D_INVALIDATE(9) 						   The Linux VFS						   D_INVALIDATE(9)

NAME
       d_invalidate - invalidate a dentry

SYNOPSIS
       int d_invalidate(struct dentry * dentry);

ARGUMENTS
       dentry
	   dentry to invalidate

DESCRIPTION
       Try to invalidate the dentry if it turns out to be possible. If there are other dentries that can be reached through this one we can't
       delete it and we return -EBUSY. On success we return 0.

       no dcache lock.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							   D_INVALIDATE(9)