linux-kernel - [PATCH] net: fddi: skfp: Remove unused function

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Message-Id: <20180920223632.14113-1-natechancellor@gmail.com>
Date:   Thu, 20 Sep 2018 15:36:33 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] net: fddi: skfp: Remove unused function

Clang warns when a variable is assigned to itself.

drivers/net/fddi/skfp/pcmplc.c:1257:6: warning: explicitly assigning
value of variable of type 'int' to itself [-Wself-assign]
        phy = phy ; on_off = on_off ;
        ~~~ ^ ~~~
drivers/net/fddi/skfp/pcmplc.c:1257:21: warning: explicitly assigning
value of variable of type 'int' to itself [-Wself-assign]
        phy = phy ; on_off = on_off ;
                    ~~~~~~ ^ ~~~~~~
2 warnings generated.

Turns out this entire function doesn't actually do anything since
SK_UNUSED is just casting the pointer to void. Remove it to silence
this Clang warning.

Link: https://github.com/ClangBuiltLinux/linux/issues/128
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---
 drivers/net/fddi/skfp/ecm.c      |  3 ---
 drivers/net/fddi/skfp/h/cmtdef.h |  1 -
 drivers/net/fddi/skfp/pcmplc.c   | 11 -----------
 3 files changed, 15 deletions(-)

diff --git a/drivers/net/fddi/skfp/ecm.c b/drivers/net/fddi/skfp/ecm.c
index eee9ba91346a..c813e462183d 100644
--- a/drivers/net/fddi/skfp/ecm.c
+++ b/drivers/net/fddi/skfp/ecm.c
@@ -30,7 +30,6 @@
  *
  * 	The following external HW dependent functions are referenced :
  * 		sm_pm_bypass_req()
- * 		sm_pm_ls_latch()
  * 		sm_pm_get_ls()
  * 
  * 	The following HW dependent events are required :
@@ -356,8 +355,6 @@ static void ecm_fsm(struct s_smc *smc, int cmd)
 		 */
 		start_ecm_timer(smc,smc->s.ecm_check_poll,0) ;
 		smc->e.ecm_line_state = TRUE ;	/* flag to pcm: report Q/HLS */
-		(void) sm_pm_ls_latch(smc,PA,1) ; /* enable line state latch */
-		(void) sm_pm_ls_latch(smc,PB,1) ; /* enable line state latch */
 		ACTIONS_DONE() ;
 		break ;
 	case EC6_CHECK :
diff --git a/drivers/net/fddi/skfp/h/cmtdef.h b/drivers/net/fddi/skfp/h/cmtdef.h
index 5d6891154367..a12f464941ed 100644
--- a/drivers/net/fddi/skfp/h/cmtdef.h
+++ b/drivers/net/fddi/skfp/h/cmtdef.h
@@ -513,7 +513,6 @@ void pcm_status_state(struct s_smc *smc, int np, int *type, int *state,
 void plc_config_mux(struct s_smc *smc, int mux);
 void sm_lem_evaluate(struct s_smc *smc);
 void mac_update_counter(struct s_smc *smc);
-void sm_pm_ls_latch(struct s_smc *smc, int phy, int on_off);
 void sm_ma_control(struct s_smc *smc, int mode);
 void sm_mac_check_beacon_claim(struct s_smc *smc);
 void config_mux(struct s_smc *smc, int mux);
diff --git a/drivers/net/fddi/skfp/pcmplc.c b/drivers/net/fddi/skfp/pcmplc.c
index a9ecf923f63d..6ef44c480bd5 100644
--- a/drivers/net/fddi/skfp/pcmplc.c
+++ b/drivers/net/fddi/skfp/pcmplc.c
@@ -30,7 +30,6 @@
  * 	The following external HW dependent functions are referenced :
  * 		sm_pm_control()
  *		sm_ph_linestate()
- *		sm_pm_ls_latch()
  *
  * 	The following HW dependent events are required :
  *		PC_QLS
@@ -1248,16 +1247,6 @@ static void sm_ph_lem_stop(struct s_smc *smc, int np)
 	CLEAR(PLC(np,PL_INTR_MASK),PL_LE_CTR) ;
 }
 
-/* ARGSUSED */
-void sm_pm_ls_latch(struct s_smc *smc, int phy, int on_off)
-/* int on_off;	en- or disable ident. ls */
-{
-	SK_UNUSED(smc) ;
-
-	phy = phy ; on_off = on_off ;
-}
-
-
 /*
  * PCM pseudo code
  * receive actions are called AFTER the bit n is received,
-- 
2.19.0