linux-kernel - [PATCH 07/20] platform: goldfish: pipe: Replace an array of 1 with a variable

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Date:   Mon, 27 Aug 2018 11:23:02 -0700
From:   rkir@...gle.com
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, tkjos@...gle.com,
        Roman Kiryanov <rkir@...gle.com>
Subject: [PATCH 07/20] platform: goldfish: pipe: Replace an array of 1 with a variable

From: Roman Kiryanov <rkir@...gle.com>

There is no reason to have an array of 1.

Signed-off-by: Roman Kiryanov <rkir@...gle.com>
---
 drivers/platform/goldfish/goldfish_pipe.c | 28 +++++++++++------------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c
index 24e40deb98cc..e9e3e791c0d4 100644
--- a/drivers/platform/goldfish/goldfish_pipe.c
+++ b/drivers/platform/goldfish/goldfish_pipe.c
@@ -205,7 +205,7 @@ struct goldfish_pipe_dev {
 	unsigned char __iomem *base;
 };
 
-static struct goldfish_pipe_dev pipe_dev[1] = {};
+struct goldfish_pipe_dev goldfish_pipe_dev;
 
 static int goldfish_cmd_locked(struct goldfish_pipe *pipe, enum PipeCmdCode cmd)
 {
@@ -564,12 +564,12 @@ static struct goldfish_pipe *signalled_pipes_pop_front(
 
 static void goldfish_interrupt_task(unsigned long unused)
 {
-	struct goldfish_pipe_dev *dev = pipe_dev;
 	/* Iterate over the signalled pipes and wake them one by one */
 	struct goldfish_pipe *pipe;
 	int wakes;
 
-	while ((pipe = signalled_pipes_pop_front(dev, &wakes)) != NULL) {
+	while ((pipe = signalled_pipes_pop_front(&goldfish_pipe_dev, &wakes)) !=
+			NULL) {
 		if (wakes & PIPE_WAKE_CLOSED) {
 			pipe->flags = 1 << BIT_CLOSED_ON_HOST;
 		} else {
@@ -607,7 +607,7 @@ static irqreturn_t goldfish_pipe_interrupt(int irq, void *dev_id)
 	unsigned long flags;
 	struct goldfish_pipe_dev *dev = dev_id;
 
-	if (dev != pipe_dev)
+	if (dev != &goldfish_pipe_dev)
 		return IRQ_NONE;
 
 	/* Request the signalled pipes from the device */
@@ -672,7 +672,7 @@ static int get_free_pipe_id_locked(struct goldfish_pipe_dev *dev)
  */
 static int goldfish_pipe_open(struct inode *inode, struct file *file)
 {
-	struct goldfish_pipe_dev *dev = pipe_dev;
+	struct goldfish_pipe_dev *dev = &goldfish_pipe_dev;
 	unsigned long flags;
 	int id;
 	int status;
@@ -763,7 +763,7 @@ static const struct file_operations goldfish_pipe_fops = {
 	.release = goldfish_pipe_release,
 };
 
-static struct miscdevice goldfish_pipe_dev = {
+static struct miscdevice goldfish_pipe_miscdev = {
 	.minor = MISC_DYNAMIC_MINOR,
 	.name = "goldfish_pipe",
 	.fops = &goldfish_pipe_fops,
@@ -771,8 +771,8 @@ static struct miscdevice goldfish_pipe_dev = {
 
 static int goldfish_pipe_device_init(struct platform_device *pdev)
 {
+	struct goldfish_pipe_dev *dev = &goldfish_pipe_dev;
 	char *page;
-	struct goldfish_pipe_dev *dev = pipe_dev;
 	int err = devm_request_irq(&pdev->dev, dev->irq,
 				goldfish_pipe_interrupt,
 				IRQF_SHARED, "goldfish_pipe", dev);
@@ -781,7 +781,7 @@ static int goldfish_pipe_device_init(struct platform_device *pdev)
 		return err;
 	}
 
-	err = misc_register(&goldfish_pipe_dev);
+	err = misc_register(&goldfish_pipe_miscdev);
 	if (err) {
 		dev_err(&pdev->dev, "unable to register v2 device\n");
 		return err;
@@ -830,18 +830,16 @@ static int goldfish_pipe_device_init(struct platform_device *pdev)
 
 static void goldfish_pipe_device_deinit(struct platform_device *pdev)
 {
-	struct goldfish_pipe_dev *dev = pipe_dev;
-
-	misc_deregister(&goldfish_pipe_dev);
-	kfree(dev->pipes);
-	free_page((unsigned long)dev->buffers);
+	misc_deregister(&goldfish_pipe_miscdev);
+	kfree(goldfish_pipe_dev.pipes);
+	free_page((unsigned long)goldfish_pipe_dev.buffers);
 }
 
 static int goldfish_pipe_probe(struct platform_device *pdev)
 {
 	int err;
 	struct resource *r;
-	struct goldfish_pipe_dev *dev = pipe_dev;
+	struct goldfish_pipe_dev *dev = &goldfish_pipe_dev;
 
 	/* not thread safe, but this should not happen */
 	WARN_ON(dev->base != NULL);
@@ -889,7 +887,7 @@ static int goldfish_pipe_probe(struct platform_device *pdev)
 
 static int goldfish_pipe_remove(struct platform_device *pdev)
 {
-	struct goldfish_pipe_dev *dev = pipe_dev;
+	struct goldfish_pipe_dev *dev = &goldfish_pipe_dev;
 	goldfish_pipe_device_deinit(pdev);
 	dev->base = NULL;
 	return 0;
-- 
2.19.0.rc0.228.g281dcd1b4d0-goog