linux-kernel - [PATCH 06/16] char: applicom: Remove 3 unused variables 'ret' and 2 instances of 'byte_reset

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Date:   Thu, 20 May 2021 13:13:37 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        dwmw2@...radead.org
Subject: [PATCH 06/16] char: applicom: Remove 3 unused variables 'ret' and 2 instances of 'byte_reset_it'

Fixes the following W=1 kernel build warning(s):

 drivers/char/applicom.c: In function ‘ac_register_board’:
 drivers/char/applicom.c:131:25: warning: variable ‘byte_reset_it’ set but not used [-Wunused-but-set-variable]
 drivers/char/applicom.c: In function ‘ac_read’:
 drivers/char/applicom.c:540:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
 drivers/char/applicom.c: In function ‘ac_ioctl’:
 drivers/char/applicom.c:703:25: warning: variable ‘byte_reset_it’ set but not used [-Wunused-but-set-variable]

Cc: Arnd Bergmann <arnd@...db.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: dwmw2@...radead.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/char/applicom.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
index deb85a334c937..2d4ab42a986cb 100644
--- a/drivers/char/applicom.c
+++ b/drivers/char/applicom.c
@@ -128,8 +128,6 @@ static int dummy;	/* dev_id for request_irq() */
 static int ac_register_board(unsigned long physloc, void __iomem *loc, 
 		      unsigned char boardno)
 {
-	volatile unsigned char byte_reset_it;
-
 	if((readb(loc + CONF_END_TEST)     != 0x00) ||
 	   (readb(loc + CONF_END_TEST + 1) != 0x55) ||
 	   (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
@@ -157,7 +155,7 @@ static int ac_register_board(unsigned long physloc, void __iomem *loc,
 	apbs[boardno].RamIO = loc;
 	init_waitqueue_head(&apbs[boardno].FlagSleepSend);
 	spin_lock_init(&apbs[boardno].mutex);
-	byte_reset_it = readb(loc + RAM_IT_TO_PC);
+	readb(loc + RAM_IT_TO_PC);
 
 	numboards++;
 	return boardno + 1;
@@ -537,7 +535,6 @@ static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_
 	unsigned long flags;
 	unsigned int i;
 	unsigned char tmp;
-	int ret = 0;
 	DECLARE_WAITQUEUE(wait, current);
 #ifdef DEBUG
 	int loopcount=0;
@@ -568,7 +565,7 @@ static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_
 
 				/* Got a packet for us */
 				memset(&st_loc, 0, sizeof(st_loc));
-				ret = do_ac_read(i, buf, &st_loc, &mailbox);
+				do_ac_read(i, buf, &st_loc, &mailbox);
 				spin_unlock_irqrestore(&apbs[i].mutex, flags);
 				set_current_state(TASK_RUNNING);
 				remove_wait_queue(&FlagSleepRec, &wait);
@@ -700,7 +697,6 @@ static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	void __iomem *pmem;
 	int ret = 0;
 	static int warncount = 10;
-	volatile unsigned char byte_reset_it;
 	struct st_ram_io *adgl;
 	void __user *argp = (void __user *)arg;
 
@@ -762,7 +758,7 @@ static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		
 		for (i = 0; i < MAX_BOARD; i++) {
 			if (apbs[i].RamIO) {
-				byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
+				readb(apbs[i].RamIO + RAM_IT_TO_PC);
 			}
 		}
 		break;
-- 
2.31.1