+#ifdef __KERNEL__
+# include <linux/fs.h>
+# include <linux/dcache.h>
+# ifdef CONFIG_FS_POSIX_ACL
+# include <linux/posix_acl_xattr.h>
+# define LUSTRE_POSIX_ACL_MAX_ENTRIES 32
+# define LUSTRE_POSIX_ACL_MAX_SIZE \
+ (sizeof(posix_acl_xattr_header) + \
+ LUSTRE_POSIX_ACL_MAX_ENTRIES * sizeof(posix_acl_xattr_entry))
+# endif /* CONFIG_FS_POSIX_ACL */
+#endif /* __KERNEL__ */
+
+#ifndef LUSTRE_POSIX_ACL_MAX_SIZE
+# define LUSTRE_POSIX_ACL_MAX_SIZE 0
+#endif /* LUSTRE_POSIX_ACL_MAX_SIZE */