linux-kernel - Re: [PATCH 08/30] compat: Use COMPAT_USE_64BIT

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Message-ID: <CA+55aFwiV3N-9-pB6ofN-5GBS0mnPTBGAdPH1M70wK8qr-=PQg@mail.gmail.com>
Date:	Sun, 19 Feb 2012 16:56:11 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	mingo@...nel.org, tglx@...utronix.de, akpm@...ux-foundation.org,
	hjl.tools@...il.com, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <greg@...ah.com>
Subject: Re: [PATCH 08/30] compat: Use COMPAT_USE_64BIT_TIME in the lp driver

On Sun, Feb 19, 2012 at 4:07 PM, H. Peter Anvin <hpa@...or.com> wrote:
> From: "H. J. Lu" <hjl.tools@...il.com>
>
> Enable the lp driver to be used with a compat ABI with 64-bit time.

Ugh. Is this really the only case?

Because if it isn't, I suspect it would be much better off with a
helper function. In fact, even if this *does* end up being the only
place, a helper function to get/set a timeval from user space sounds
like a good idea, and makes things much more readable than that
ad-hoccery in the middle of code.

IOW, I'd like to see something like

   get_user_timeval(void __user *tv, struct timeval *res)

even if it would be only local to this file.

                   Linus
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