linux-kernel - [PATCH] samples/kfifo: Rename read_lock/write

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Date:   Thu, 23 Sep 2021 19:29:18 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Stefani Seibold <stefani@...bold.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH] samples/kfifo: Rename read_lock/write_lock

The variables names read_lock and write_lock can clash with functions used for
read/writer locks.

Rename read_lock to read_access and write_lock to write_access to avoid a name
collision.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Link: https://lkml.kernel.org/r/20210806152551.qio7c3ho6pexezup@linutronix.de
---

Repost.

 samples/kfifo/bytestream-example.c |   12 ++++++------
 samples/kfifo/inttype-example.c    |   12 ++++++------
 samples/kfifo/record-example.c     |   12 ++++++------
 3 files changed, 18 insertions(+), 18 deletions(-)
---
--- a/samples/kfifo/bytestream-example.c
+++ b/samples/kfifo/bytestream-example.c
@@ -22,10 +22,10 @@
 #define	PROC_FIFO	"bytestream-fifo"
 
 /* lock for procfs read access */
-static DEFINE_MUTEX(read_lock);
+static DEFINE_MUTEX(read_access);
 
 /* lock for procfs write access */
-static DEFINE_MUTEX(write_lock);
+static DEFINE_MUTEX(write_access);
 
 /*
  * define DYNAMIC in this example for a dynamically allocated fifo.
@@ -116,12 +116,12 @@ static ssize_t fifo_write(struct file *f
 	int ret;
 	unsigned int copied;
 
-	if (mutex_lock_interruptible(&write_lock))
+	if (mutex_lock_interruptible(&write_access))
 		return -ERESTARTSYS;
 
 	ret = kfifo_from_user(&test, buf, count, &copied);
 
-	mutex_unlock(&write_lock);
+	mutex_unlock(&write_access);
 	if (ret)
 		return ret;
 
@@ -134,12 +134,12 @@ static ssize_t fifo_read(struct file *fi
 	int ret;
 	unsigned int copied;
 
-	if (mutex_lock_interruptible(&read_lock))
+	if (mutex_lock_interruptible(&read_access))
 		return -ERESTARTSYS;
 
 	ret = kfifo_to_user(&test, buf, count, &copied);
 
-	mutex_unlock(&read_lock);
+	mutex_unlock(&read_access);
 	if (ret)
 		return ret;
 
--- a/samples/kfifo/inttype-example.c
+++ b/samples/kfifo/inttype-example.c
@@ -22,10 +22,10 @@
 #define	PROC_FIFO	"int-fifo"
 
 /* lock for procfs read access */
-static DEFINE_MUTEX(read_lock);
+static DEFINE_MUTEX(read_access);
 
 /* lock for procfs write access */
-static DEFINE_MUTEX(write_lock);
+static DEFINE_MUTEX(write_access);
 
 /*
  * define DYNAMIC in this example for a dynamically allocated fifo.
@@ -109,12 +109,12 @@ static ssize_t fifo_write(struct file *f
 	int ret;
 	unsigned int copied;
 
-	if (mutex_lock_interruptible(&write_lock))
+	if (mutex_lock_interruptible(&write_access))
 		return -ERESTARTSYS;
 
 	ret = kfifo_from_user(&test, buf, count, &copied);
 
-	mutex_unlock(&write_lock);
+	mutex_unlock(&write_access);
 	if (ret)
 		return ret;
 
@@ -127,12 +127,12 @@ static ssize_t fifo_read(struct file *fi
 	int ret;
 	unsigned int copied;
 
-	if (mutex_lock_interruptible(&read_lock))
+	if (mutex_lock_interruptible(&read_access))
 		return -ERESTARTSYS;
 
 	ret = kfifo_to_user(&test, buf, count, &copied);
 
-	mutex_unlock(&read_lock);
+	mutex_unlock(&read_access);
 	if (ret)
 		return ret;
 
--- a/samples/kfifo/record-example.c
+++ b/samples/kfifo/record-example.c
@@ -22,10 +22,10 @@
 #define	PROC_FIFO	"record-fifo"
 
 /* lock for procfs read access */
-static DEFINE_MUTEX(read_lock);
+static DEFINE_MUTEX(read_access);
 
 /* lock for procfs write access */
-static DEFINE_MUTEX(write_lock);
+static DEFINE_MUTEX(write_access);
 
 /*
  * define DYNAMIC in this example for a dynamically allocated fifo.
@@ -123,12 +123,12 @@ static ssize_t fifo_write(struct file *f
 	int ret;
 	unsigned int copied;
 
-	if (mutex_lock_interruptible(&write_lock))
+	if (mutex_lock_interruptible(&write_access))
 		return -ERESTARTSYS;
 
 	ret = kfifo_from_user(&test, buf, count, &copied);
 
-	mutex_unlock(&write_lock);
+	mutex_unlock(&write_access);
 	if (ret)
 		return ret;
 
@@ -141,12 +141,12 @@ static ssize_t fifo_read(struct file *fi
 	int ret;
 	unsigned int copied;
 
-	if (mutex_lock_interruptible(&read_lock))
+	if (mutex_lock_interruptible(&read_access))
 		return -ERESTARTSYS;
 
 	ret = kfifo_to_user(&test, buf, count, &copied);
 
-	mutex_unlock(&read_lock);
+	mutex_unlock(&read_access);
 	if (ret)
 		return ret;