Let's verify the precalculated subids for 4/5/6 values.
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
mm/rmap_id.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/mm/rmap_id.c b/mm/rmap_id.c
index 6c3187547741..421d8d2b646c 100644
--- a/mm/rmap_id.c
+++ b/mm/rmap_id.c
@@ -481,3 +481,29 @@ void free_rmap_id(int id)
ida_free(&rmap_ida, id);
spin_unlock(&rmap_id_lock);
}
+
+#ifdef CONFIG_DEBUG_VM
+static int __init rmap_id_init(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(rmap_subids_4); i++)
+ WARN_ON_ONCE(calc_rmap_subid(1u << RMAP_SUBID_4_MAX_ORDER, i) !=
+ rmap_subids_4[i]);
+
+#if MAX_ORDER >= RMAP_SUBID_5_MIN_ORDER
+ for (i = 0; i < ARRAY_SIZE(rmap_subids_5); i++)
+ WARN_ON_ONCE(calc_rmap_subid(1u << RMAP_SUBID_5_MAX_ORDER, i) !=
+ rmap_subids_5[i]);
+#endif
+
+#if MAX_ORDER >= RMAP_SUBID_6_MIN_ORDER
+ for (i = 0; i < ARRAY_SIZE(rmap_subids_6); i++)
+ WARN_ON_ONCE(calc_rmap_subid(1u << RMAP_SUBID_6_MAX_ORDER, i) !=
+ rmap_subids_6[i]);
+#endif
+
+ return 0;
+}
+module_init(rmap_id_init)
+#endif /* CONFIG_DEBUG_VM */
--
2.41.0
