On Fri, 2019-09-13 at 15:57 -0300, André Almeida wrote:
> The pr_fmt macro is useful to format log messages printed by pr_XXXX()
> functions. Add text to explain the purpose of it, how to use and an
> example.
[]
> diff --git a/Documentation/process/coding-style.rst 
> b/Documentation/process/coding-style.rst
[]
> @@ -819,7 +819,15 @@ which you should use to make sure messages are matched 
> to the right device
>  and driver, and are tagged with the right level:  dev_err(), dev_warn(),
>  dev_info(), and so forth.  For messages that aren't associated with a
>  particular device, <linux/printk.h> defines pr_notice(), pr_info(),
> -pr_warn(), pr_err(), etc.
> +pr_warn(), pr_err(), etc. It's possible to format pr_XXX() messages using the
> +macro pr_fmt() to prevent rewriting the style of messages. It should be
> +defined before including ``include/printk.h``, to avoid compiler warning 
> about

Please make this '#include <linux/kernel.h>'

printk.h should normally not be #included.


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