linux-kernel - Re: [PATCH 07/12] atm: hide 'struct zatm_t

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Message-ID: <1443626675.3494.41.camel@gmail.com>
Date:	Wed, 30 Sep 2015 11:24:35 -0400
From:	"Charles (Chas) Williams" <3chas3@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	netdev@...r.kernel.org, y2038@...ts.linaro.org,
	linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	linux-atm-general@...ts.sourceforge.net
Subject: Re: [PATCH 07/12] atm: hide 'struct zatm_t_hist'

On Wed, 2015-09-30 at 13:26 +0200, Arnd Bergmann wrote:
> The zatm_t_hist structure is not used anywhere in the kernel, but is
> exported to user space. As we are trying to eliminate uses of time_t
> in the kernel for y2038 compatibility, the current definition triggers
> checking tools because it contains 'struct timeval'.
> 
> We can work around this by adding '#ifdef __KERNEL__'. I could not find
> out what the structure is actually used for, so this is the safe choice
> in case there is some user space tool that relies on the definition.
> 
> If we are sure that nothing in user space relies on the structure, we
> can instead remove the definition completely.

It was used by the ZATM_GETHIST ioctl which is long since gone in the
kernel driver.  You can just remove this.

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