linux-kernel - [PATCH 1/8] staging: kpc2000: kpc_i2c: Remove unused rw

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Message-Id: <651e1f5f40fb7e7f45179eb8c550f34d51ed4787.1558832514.git.gneukum1@gmail.com>
Date:   Sun, 26 May 2019 01:18:27 +0000
From:   Geordan Neukum <gneukum1@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Geordan Neukum <gneukum1@...il.com>
Subject: [PATCH 1/8] staging: kpc2000: kpc_i2c: Remove unused rw_sem

In pi2c_probe, a rw_sem is initialized and stashed off in the
i2c_device private runtime state struct. This rw_sem is never used
after initialization. Remove the rw_sem and cleanup unneeded header
inclusion.

Signed-off-by: Geordan Neukum <gneukum1@...il.com>
---
 drivers/staging/kpc2000/kpc2000_i2c.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/staging/kpc2000/kpc2000_i2c.c b/drivers/staging/kpc2000/kpc2000_i2c.c
index fb9a8386bcce..2c272ad8eca6 100644
--- a/drivers/staging/kpc2000/kpc2000_i2c.c
+++ b/drivers/staging/kpc2000/kpc2000_i2c.c
@@ -25,7 +25,6 @@
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/fs.h>
-#include <linux/rwsem.h>
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include "kpc.h"
@@ -38,7 +37,6 @@ struct i2c_device {
 	unsigned long           smba;
 	struct i2c_adapter      adapter;
 	struct platform_device *pldev;
-	struct rw_semaphore     rw_sem;
 	unsigned int            features;
 };
 
@@ -606,7 +604,6 @@ static int pi2c_probe(struct platform_device *pldev)
 	priv->features |= FEATURE_BLOCK_BUFFER;
 
 	//init_MUTEX(&lddata->sem);
-	init_rwsem(&priv->rw_sem);
 
 	/* set up the sysfs linkage to our parent device */
 	priv->adapter.dev.parent = &pldev->dev;
-- 
2.21.0