pci.h: Explain pci_dev->aux

diff --git a/lib/pci.h b/lib/pci.h
index 47e30111404db4949ecc33cf2234885dc28a3b2d..5a1dac58e1b0999aae9fe17b519de6ae810cf8a1 100644 (file)
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -149,7 +149,7 @@ struct pci_dev {
   u8 *cache;                           /* Cached config registers */
   int cache_len;
   int hdrtype;                         /* Cached low 7 bits of header type, -1 if unknown */
-  void *aux;                           /* Auxiliary data */
+  void *aux;                           /* Auxiliary data for use by the back-end */
   struct pci_property *properties;     /* A linked list of extra properties */
   struct pci_cap *last_cap;            /* Last capability in the list */
 };