dm persistent data: set some btree fn parms const
Mark some constant parameters constant in some dm-btree functions.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
diff --git a/drivers/md/persistent-data/dm-btree.h b/drivers/md/persistent-data/dm-btree.h
index a2cd5044..fced831 100644
--- a/drivers/md/persistent-data/dm-btree.h
+++ b/drivers/md/persistent-data/dm-btree.h
@@ -58,21 +58,21 @@
* somewhere.) This method is _not_ called for insertion of a new
* value: It is assumed the ref count is already 1.
*/
- void (*inc)(void *context, void *value);
+ void (*inc)(void *context, const void *value);
/*
* This value is being deleted. The btree takes care of freeing
* the memory pointed to by @value. Often the del function just
* needs to decrement a reference count somewhere.
*/
- void (*dec)(void *context, void *value);
+ void (*dec)(void *context, const void *value);
/*
* A test for equality between two values. When a value is
* overwritten with a new one, the old one has the dec method
* called _unless_ the new and old value are deemed equal.
*/
- int (*equal)(void *context, void *value1, void *value2);
+ int (*equal)(void *context, const void *value1, const void *value2);
};
/*