lsm_audit: don't specify the audit pre/post callbacks in 'struct common_audit_data'

It just bloats the audit data structure for no good reason, since the
only time those fields are filled are just before calling the
common_lsm_audit() function, which is also the only user of those
fields.

So just make them be the arguments to common_lsm_audit(), rather than
bloating that structure that is passed around everywhere, and is
initialized in hot paths.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index 2af7fcc..c8115f7 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -321,9 +321,8 @@
 	sad->object  = object_label;
 	sad->request = request_buffer;
 	sad->result  = result;
-	a->lsm_pre_audit = smack_log_callback;
 
-	common_lsm_audit(a);
+	common_lsm_audit(a, smack_log_callback, NULL);
 }
 #else /* #ifdef CONFIG_AUDIT */
 void smack_log(char *subject_label, char *object_label, int request,