[PATCH] example-module: use pr_info instead of printk

[PATCH] example-module: use pr_info instead of printk

[srinuvasan.a via isar-users]

From: Srinuvasan A <srinuvasan.a@siemens.com>

The initialization message was not visible in dmesg
when the module was loaded.

Switch to pr_info() to ensure the message is properly
logged and visible during module initialization.

Signed-off-by: Srinuvasan A <srinuvasan.a@siemens.com>
---
 .../recipes-kernel/example-module/files/src/example-module.c    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta-isar/recipes-kernel/example-module/files/src/example-module.c b/meta-isar/recipes-kernel/example-module/files/src/example-module.c
index 4e74ee74..5a408726 100644
--- a/meta-isar/recipes-kernel/example-module/files/src/example-module.c
+++ b/meta-isar/recipes-kernel/example-module/files/src/example-module.c
@@ -10,7 +10,7 @@
 
 static int __init example_module_init(void)
 {
-	printk("Just an example\n");
+	pr_info("Just an example\n");
 	return 0;
 }
 
-- 
2.34.1

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Re: [PATCH] example-module: use pr_info instead of printk

['Jan Kiszka' via isar-users]

On 10.04.26 18:50, srinuvasan.a via isar-users wrote:
> From: Srinuvasan A <srinuvasan.a@siemens.com>
> 
> The initialization message was not visible in dmesg
> when the module was loaded.

That is a matter of log level settings on the target. We can still
change this if it helps.

> 
> Switch to pr_info() to ensure the message is properly
> logged and visible during module initialization.
> 

Which test case in Isar was affected by this? Or was this a downstream
target?

> Signed-off-by: Srinuvasan A <srinuvasan.a@siemens.com>
> ---
>  .../recipes-kernel/example-module/files/src/example-module.c    | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/meta-isar/recipes-kernel/example-module/files/src/example-module.c b/meta-isar/recipes-kernel/example-module/files/src/example-module.c
> index 4e74ee74..5a408726 100644
> --- a/meta-isar/recipes-kernel/example-module/files/src/example-module.c
> +++ b/meta-isar/recipes-kernel/example-module/files/src/example-module.c
> @@ -10,7 +10,7 @@
>  
>  static int __init example_module_init(void)
>  {
> -	printk("Just an example\n");
> +	pr_info("Just an example\n");
>  	return 0;
>  }
>  

Jan

-- 
Siemens AG, Foundational Technologies
Linux Expert Center

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RE: [PATCH] example-module: use pr_info instead of printk

['Arjunan, Srinu' via isar-users]

> Which test case in Isar was affected by this? Or was this a downstream target?

No Isar test cases are affected, this was observed only on a downstream target.

Your point is valid — we will look into adjusting the log level settings on our target instead of unconditionally ensuring the message appears in dmesg.

Many thanks,
Srinu

-----Original Message-----
From: Kiszka, Jan (FT RPD CED) <jan.kiszka@siemens.com> 
Sent: 10 April 2026 23:12
To: Arjunan, Srinu (FT FDS CES LX PBU 2) <srinuvasan.a@siemens.com>; isar-users@googlegroups.com
Subject: Re: [PATCH] example-module: use pr_info instead of printk

On 10.04.26 18:50, srinuvasan.a via isar-users wrote:
> From: Srinuvasan A <srinuvasan.a@siemens.com>
> 
> The initialization message was not visible in dmesg when the module 
> was loaded.

That is a matter of log level settings on the target. We can still change this if it helps.

> 
> Switch to pr_info() to ensure the message is properly logged and 
> visible during module initialization.
> 

Which test case in Isar was affected by this? Or was this a downstream target?

> Signed-off-by: Srinuvasan A <srinuvasan.a@siemens.com>
> ---
>  .../recipes-kernel/example-module/files/src/example-module.c    | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git 
> a/meta-isar/recipes-kernel/example-module/files/src/example-module.c 
> b/meta-isar/recipes-kernel/example-module/files/src/example-module.c
> index 4e74ee74..5a408726 100644
> --- 
> a/meta-isar/recipes-kernel/example-module/files/src/example-module.c
> +++ b/meta-isar/recipes-kernel/example-module/files/src/example-module
> +++ .c
> @@ -10,7 +10,7 @@
>  
>  static int __init example_module_init(void)  {
> -	printk("Just an example\n");
> +	pr_info("Just an example\n");
>  	return 0;
>  }
>  

Jan

--
Siemens AG, Foundational Technologies
Linux Expert Center

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