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[PATCH gnumach 1/3] vm: remove unused field from struct vm_external


From: Justus Winter
Subject: [PATCH gnumach 1/3] vm: remove unused field from struct vm_external
Date: Sun, 7 Feb 2016 13:58:51 +0100

* vm/vm_external.h (struct vm_external): Remove unused field
'existence_count'.
---
 vm/vm_external.h | 5 +++++
 1 file changed, 5 insertions(+)

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)
-- 
2.1.4




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