} pal_version_u_t;
-/* Return PAL version information */
+/*
+ * Return PAL version information. While the documentation states that
+ * PAL_VERSION can be called in either physical or virtual mode, some
+ * implementations only allow physical calls. We don't call it very often,
+ * so the overhead isn't worth eliminating.
+ */
static inline s64
ia64_pal_version (pal_version_u_t *pal_min_version, pal_version_u_t *pal_cur_version)
{