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[lvm-devel] [PATCH 07/20] Use const char * arithmetic for offset calculation



As 'const' types are also passed to this macro - lets keep
offset calculation with const char *. Cleans several gcc
constness warnings.

Signed-off-by: Zdenek Kabelac <zkabelac redhat com>
---
 libdm/libdevmapper.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libdm/libdevmapper.h b/libdm/libdevmapper.h
index d385030..4aa9991 100644
--- a/libdm/libdevmapper.h
+++ b/libdm/libdevmapper.h
@@ -814,7 +814,7 @@ struct dm_list *dm_list_next(const struct dm_list *head, const struct dm_list *e
  * contained in a structure of type t, return the containing structure.
  */
 #define dm_list_struct_base(v, t, head) \
-    ((t *)((char*)(v) - (char*)&((t *) 0)->head))
+    ((t *)((const char *)(v) - (const char *)&((t *) 0)->head))
 
 /*
  * Given the address v of an instance of 'struct dm_list list' contained in
-- 
1.7.3.3


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