idr: error checking factorization

[h-e-n] / include / linux / idr.h

diff --git a/include/linux/idr.h b/include/linux/idr.h
index 1af61d2..762c3f2 100644 (file)
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -73,6 +73,12 @@ struct idr {
 }
 #define DEFINE_IDR(name)       struct idr name = IDR_INIT(name)
 
+/* Actions to be taken after a call to _idr_sub_alloc */
+#define IDR_NEED_TO_GROW -2
+#define IDR_NOMORE_SPACE -3
+
+#define _idr_rc_to_errno(rc) ((rc) == -1 ? -EAGAIN : -ENOSPC)
+
 /*
  * This is what we export.
  */