vfs: Make d_invalidate return void

Now that d_invalidate can no longer fail, stop returning a useless
return code.  For the few callers that checked the return code update
remove the handling of d_invalidate failure.

Reviewed-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 8be6988..06e8cfc 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -486,8 +486,7 @@
 				nfs_setsecurity(dentry->d_inode, entry->fattr, entry->label);
 			goto out;
 		} else {
-			if (d_invalidate(dentry) != 0)
-				goto out;
+			d_invalidate(dentry);
 			dput(dentry);
 		}
 	}