Subject: samples/kfifo: Rename read_lock/write_lock
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu Jul  1 17:43:16 2021 +0200

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

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@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20210806152551.qio7c3ho6pexezup@linutronix.de
---
 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;