audit: use inline function to get audit context

Recognizing that the audit context is an internal audit value, use an
access function to retrieve the audit context pointer for the task
rather than reaching directly into the task struct to get it.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[PM: merge fuzz in auditsc.c and selinuxfs.c, checkpatch.pl fixes]
Signed-off-by: Paul Moore <paul@paul-moore.com>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index fcce8ee..7f2e31a 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -736,7 +736,7 @@
 
 	if (audit_enabled == 0)
 		return NULL;
-	audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
+	audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
 				    AUDIT_MAC_IPSEC_EVENT);
 	if (audit_buf == NULL)
 		return NULL;