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-rw-r--r--vm/vm_external.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/vm/vm_external.h b/vm/vm_external.h
index 55c9e48..4e44ddf 100644
--- a/vm/vm_external.h
+++ b/vm/vm_external.h
@@ -46,9 +46,14 @@ typedef struct vm_external {
* been written to backing
* storage.
*/
+#if 0
+ /* XXX: Currently, existence_count is not used. I guess it
+ could be useful to get rid of the map if the count drops to
+ zero. */
int existence_count;/* Number of bits turned on in
* existence_map.
*/
+#endif
} *vm_external_t;
#define VM_EXTERNAL_NULL ((vm_external_t) 0)