[PATCH] platform/x86: quickstart: Use devm_mutex_init()

[PATCH] platform/x86: quickstart: Use devm_mutex_init()

[Christophe JAILLET]

Use devm_mutex_init() instead of hand-writing it.

This saves some LoC, improves readability and saves some space in the
generated .o file.

Before:
======
   text	   data	    bss	    dec	    hex	filename
   7607	   2616	     64	  10287	   282f	drivers/platform/x86/quickstart.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   7301	   2544	     64	   9909	   26b5	drivers/platform/x86/quickstart.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/platform/x86/quickstart.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/platform/x86/quickstart.c b/drivers/platform/x86/quickstart.c
index c332c7cdaff5..acb58518be37 100644
--- a/drivers/platform/x86/quickstart.c
+++ b/drivers/platform/x86/quickstart.c
@@ -154,13 +154,6 @@ static void quickstart_notify_remove(void *context)
 	acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, quickstart_notify);
 }
 
-static void quickstart_mutex_destroy(void *data)
-{
-	struct mutex *lock = data;
-
-	mutex_destroy(lock);
-}
-
 static int quickstart_probe(struct platform_device *pdev)
 {
 	struct quickstart_data *data;
@@ -179,8 +172,7 @@ static int quickstart_probe(struct platform_device *pdev)
 	data->dev = &pdev->dev;
 	dev_set_drvdata(&pdev->dev, data);
 
-	mutex_init(&data->input_lock);
-	ret = devm_add_action_or_reset(&pdev->dev, quickstart_mutex_destroy, &data->input_lock);
+	ret = devm_mutex_init(&pdev->dev, &data->input_lock);
 	if (ret < 0)
 		return ret;
 
-- 
2.51.0

Re: [PATCH] platform/x86: quickstart: Use devm_mutex_init()

[Ilpo Järvinen]

On Sun, 07 Sep 2025 15:32:26 +0200, Christophe JAILLET wrote:

> Use devm_mutex_init() instead of hand-writing it.
> 
> This saves some LoC, improves readability and saves some space in the
> generated .o file.
> 
> Before:
> ======
>    text	   data	    bss	    dec	    hex	filename
>    7607	   2616	     64	  10287	   282f	drivers/platform/x86/quickstart.o
> 
> [...]


Thank you for your contribution, it has been applied to my local
review-ilpo-next branch. Note it will show up in the public
platform-drivers-x86/review-ilpo-next branch only once I've pushed my
local branch there, which might take a while.

The list of commits applied:
[1/1] platform/x86: quickstart: Use devm_mutex_init()
      commit: c4f8b11bacd562f38c85f4f81a0a4426b267df70

--
 i.