selinux: delete selinux_xfrm_policy_lookup() useless argument

seliunx_xfrm_policy_lookup() is hooks of security_xfrm_policy_lookup().
The dir argument is uselss in security_xfrm_policy_lookup(). So
remove the dir argument from selinux_xfrm_policy_lookup() and
security_xfrm_policy_lookup().

Signed-off-by: Zhongjun Tan <tanzhongjun@yulong.com>
[PM: reformat the subject line]
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/security.c

@@ -2466,9 +2466,9 @@ void security_xfrm_state_free(struct xfrm_state *x)
 	call_void_hook(xfrm_state_free_security, x);
 }
 
-int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
+int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
 {
-	return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
+	return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid);
 }
 
 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,

security/selinux/include/xfrm.h

@@ -23,7 +23,7 @@ int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
 				     struct xfrm_sec_ctx *polsec, u32 secid);
 void selinux_xfrm_state_free(struct xfrm_state *x);
 int selinux_xfrm_state_delete(struct xfrm_state *x);
-int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
+int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid);
 int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
 				      struct xfrm_policy *xp,
 				      const struct flowi_common *flic);

security/selinux/xfrm.c

@@ -150,7 +150,7 @@ static int selinux_xfrm_delete(struct xfrm_sec_ctx *ctx)
  * LSM hook implementation that authorizes that a flow can use a xfrm policy
  * rule.
  */
-int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
+int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
 {
 	int rc;