audit: use union for audit_field values since they are mutually exclusive
Since only one of val, uid, gid and lsm* are used at any given time, combine
them to reduce the size of the struct audit_field.
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 1ae0089..36dffec 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -66,12 +66,16 @@
struct audit_field {
u32 type;
- u32 val;
- kuid_t uid;
- kgid_t gid;
+ union {
+ u32 val;
+ kuid_t uid;
+ kgid_t gid;
+ struct {
+ char *lsm_str;
+ void *lsm_rule;
+ };
+ };
u32 op;
- char *lsm_str;
- void *lsm_rule;
};
extern int is_audit_feature_set(int which);