linux-kernel - Re: [PATCH] container_of: remove container_of

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Message-ID: <Y1aRABf0GeZ6AKCA@smile.fi.intel.com>
Date:   Mon, 24 Oct 2022 16:20:00 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH] container_of: remove container_of_safe()

On Mon, Oct 24, 2022 at 02:39:33PM +0200, Greg Kroah-Hartman wrote:
> It came in from a staging driver that has been long removed from the
> tree, and there are no in-kernel users of the macro, and it's very
> dubious if anyone should ever use this thing, so just remove it
> entirely.

Acked-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

> Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Cc: "Rafael J. Wysocki" <rafael@...nel.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
>  include/linux/container_of.h | 16 ----------------
>  1 file changed, 16 deletions(-)
> 
> diff --git a/include/linux/container_of.h b/include/linux/container_of.h
> index 2f4944b791b8..a6f242137b11 100644
> --- a/include/linux/container_of.h
> +++ b/include/linux/container_of.h
> @@ -21,20 +21,4 @@
>  		      "pointer type mismatch in container_of()");	\
>  	((type *)(__mptr - offsetof(type, member))); })
>  
> -/**
> - * container_of_safe - cast a member of a structure out to the containing structure
> - * @ptr:	the pointer to the member.
> - * @type:	the type of the container struct this is embedded in.
> - * @member:	the name of the member within the struct.
> - *
> - * If IS_ERR_OR_NULL(ptr), ptr is returned unchanged.
> - */
> -#define container_of_safe(ptr, type, member) ({				\
> -	void *__mptr = (void *)(ptr);					\
> -	static_assert(__same_type(*(ptr), ((type *)0)->member) ||	\
> -		      __same_type(*(ptr), void),			\
> -		      "pointer type mismatch in container_of_safe()");	\
> -	IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) :			\
> -		((type *)(__mptr - offsetof(type, member))); })
> -
>  #endif	/* _LINUX_CONTAINER_OF_H */
> -- 
> 2.38.1
> 

-- 
With Best Regards,
Andy Shevchenko