linux-kernel - Re: [RFC PATCH 1/2] block: export block_class and disk

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Date:   Sat, 1 May 2021 08:24:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Enzo Matsumiya <ematsumiya@...e.de>
Cc:     linux-leds@...r.kernel.org, linux-block@...r.kernel.org,
        u.kleine-koenig@...gutronix.de, Jens Axboe <axboe@...nel.dk>,
        Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/2] block: export block_class and disk_type symbols

On Fri, Apr 30, 2021 at 03:32:10PM -0300, Enzo Matsumiya wrote:
> Export symbols to be used by _for_each_blk() helper in LED block
> trigger.
> 
> Signed-off-by: Enzo Matsumiya <ematsumiya@...e.de>
> ---
>  block/genhd.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/block/genhd.c b/block/genhd.c
> index 8c8f543572e6..516495179230 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -1218,6 +1218,7 @@ static void disk_release(struct device *dev)
>  struct class block_class = {
>  	.name		= "block",
>  };
> +EXPORT_SYMBOL(block_class);
>  
>  static char *block_devnode(struct device *dev, umode_t *mode,
>  			   kuid_t *uid, kgid_t *gid)
> @@ -1235,6 +1236,7 @@ const struct device_type disk_type = {
>  	.release	= disk_release,
>  	.devnode	= block_devnode,
>  };
> +EXPORT_SYMBOL(disk_type);
>  
>  #ifdef CONFIG_PROC_FS
>  /*

Please please no.  These should not be needed by anything.

And if they really do, they must be EXPORT_SYMBOL_GPL().

thanks,

greg k-h