linux-kernel - Re: Device driver memory 'mmap()' function helper cleanup

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Message-ID: <CA+55aFwTG6VhjimtaROxPNBWFukq7yW7B1g+tTU1L04U9OTPdg@mail.gmail.com>
Date:	Wed, 17 Apr 2013 14:31:13 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Clemens Ladisch <clemens@...isch.de>,
	Takashi Iwai <tiwai@...e.de>,
	Mauro Carvalho Chehab <mchehab@...hat.com>
Subject: Re: Device driver memory 'mmap()' function helper cleanup

On Wed, Apr 17, 2013 at 2:28 PM, Arnd Bergmann <arnd@...db.de> wrote:
>
> There is a separate check for the physical address that gets
> mapped in hpet_mmap:

Ahh, right you are. The earlier check for PAGE_SIZE's mapping and zero
offset is indeed superfluous.

         Linus
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