linux-kernel - Re: [PATCH 1/4] nvmem: Add macro to register nvmem layout drivers

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Message-ID: <5d3d01ec1b05ec47c0590d5af14c4f37@milecki.pl>
Date:   Thu, 16 Mar 2023 17:28:04 +0100
From:   Rafał Miłecki <rafal@...ecki.pl>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, Michael Walle <michael@...le.cc>,
        Robert Marko <robert.marko@...tura.hr>,
        Luka Perkov <luka.perkov@...tura.hr>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 1/4] nvmem: Add macro to register nvmem layout drivers

On 2023-03-15 11:00, Miquel Raynal wrote:
> Provide a module_nvmem_layout_driver() macro at the end of the
> nvmem-provider.h header to reduce the boilerplate when registering 
> nvmem
> layout drivers.

I think you should take care of including <linux/device/driver.h>
instead of depending on module_nvmem_layout_driver() *callers* to do
that.

That would help avoiding errors like:

In file included from drivers/nvmem/layouts/fixed.c:5:
./include/linux/nvmem-provider.h:252:2: warning: data definition has no 
type or storage class
   252 |  module_driver(__layout_driver, nvmem_layout_register, \
       |  ^~~~~~~~~~~~~
./include/linux/nvmem-provider.h:252:2: error: type defaults to 'int' in 
declaration of 'module_driver' [-Werror=implicit-int]
   252 |  module_driver(__layout_driver, nvmem_layout_register, \
       |  ^~~~~~~~~~~~~


> Suggested-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
> ---
>  include/linux/nvmem-provider.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/nvmem-provider.h 
> b/include/linux/nvmem-provider.h
> index 0cf9f9490514..a1c668018894 100644
> --- a/include/linux/nvmem-provider.h
> +++ b/include/linux/nvmem-provider.h
> @@ -240,4 +240,9 @@ nvmem_layout_get_match_data(struct nvmem_device 
> *nvmem,
>  }
> 
>  #endif /* CONFIG_NVMEM */
> +
> +#define module_nvmem_layout_driver(__layout_driver)		\
> +	module_driver(__layout_driver, nvmem_layout_register,	\
> +		      nvmem_layout_unregister)
> +
>  #endif  /* ifndef _LINUX_NVMEM_PROVIDER_H */