linux-kernel - Re: [PATCH] i2c: core: make exported functions non-static

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Date:   Tue, 9 Jul 2019 11:25:54 +0100
From:   Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To:     Denis Efremov <efremov@...ux.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     Wolfram Sang <wsa@...-dreams.de>, Peter Rosin <peda@...ntia.se>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: core: make exported functions non-static

Hi Denis,

Thank you for the patch,

On 07/07/2019 22:04, Denis Efremov wrote:
> The functions i2c_new_client_device and i2c_new_dummy_device are declared
> static and marked EXPORT_SYMBOL_GPL(), which is at best an odd combination.
> Because the functions were decided to be a part of API, this commit removes
> the static attributes and adds the declarations to the header.

I'm afraid I think Wolfram pipped you to the post on this one.

He posted a very similar fix [0] on the 24th June.

[0]
https://lore.kernel.org/linux-renesas-soc/20190624170402.6944-1-wsa+renesas@sang-engineering.com/

I believe his patch is already applied and on it's way through the trees.

Regards

Kieran


> Fixes: 7159dbdae3c5 ("i2c: core: improve return value handling of i2c_new_device and i2c_new_dummy")
> Signed-off-by: Denis Efremov <efremov@...ux.com>
> ---
>  drivers/i2c/i2c-core-base.c | 4 ++--
>  include/linux/i2c.h         | 7 +++++++
>  2 files changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
> index 9e43508d4567..7792fa40fc32 100644
> --- a/drivers/i2c/i2c-core-base.c
> +++ b/drivers/i2c/i2c-core-base.c
> @@ -721,7 +721,7 @@ static int i2c_dev_irq_from_resources(const struct resource *resources,
>   * This returns the new i2c client, which may be saved for later use with
>   * i2c_unregister_device(); or an ERR_PTR to describe the error.
>   */
> -static struct i2c_client *
> +struct i2c_client *
>  i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
>  {
>  	struct i2c_client	*client;
> @@ -887,7 +887,7 @@ static struct i2c_driver dummy_driver = {
>   * This returns the new i2c client, which should be saved for later use with
>   * i2c_unregister_device(); or an ERR_PTR to describe the error.
>   */
> -static struct i2c_client *
> +struct i2c_client *
>  i2c_new_dummy_device(struct i2c_adapter *adapter, u16 address)
>  {
>  	struct i2c_board_info info = {
> diff --git a/include/linux/i2c.h b/include/linux/i2c.h
> index 1308126fc384..fa42f6f594ce 100644
> --- a/include/linux/i2c.h
> +++ b/include/linux/i2c.h
> @@ -436,6 +436,10 @@ struct i2c_board_info {
>  extern struct i2c_client *
>  i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
>  
> +extern struct i2c_client *
> +i2c_new_client_device(struct i2c_adapter *adap,
> +			struct i2c_board_info const *info);
> +
>  /* If you don't know the exact address of an I2C device, use this variant
>   * instead, which can probe for device presence in a list of possible
>   * addresses. The "probe" callback function is optional. If it is provided,
> @@ -457,6 +461,9 @@ extern int i2c_probe_func_quick_read(struct i2c_adapter *, unsigned short addr);
>  extern struct i2c_client *
>  i2c_new_dummy(struct i2c_adapter *adap, u16 address);
>  
> +extern struct i2c_client *
> +i2c_new_dummy_device(struct i2c_adapter *adap, u16 address);
> +
>  extern struct i2c_client *
>  devm_i2c_new_dummy_device(struct device *dev, struct i2c_adapter *adap, u16 address);
>  
>