linux-kernel - Re: [RFC v2 1/2] compiler: use compiler to detect integer overflows

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Message-ID: <547A935F.6070601@oracle.com>
Date:	Sat, 29 Nov 2014 22:47:43 -0500
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC v2 1/2] compiler: use compiler to detect integer overflows

On 11/29/2014 01:08 PM, Linus Torvalds wrote:
> On Sat, Nov 29, 2014 at 7:07 AM, Sasha Levin <sasha.levin@...cle.com> wrote:
>> >
>> > Since we can't just change those to unsigned
> Sure we can. Just cast them. A signed start/len is bogus crap, it's a
> random wrong type.

But this is going on everywhere in fs/! It uses loff_t for pretty much anything,
even stuff which are obviously are unsigned (inode.i_size for example). Do you
think it's worth the effort to switch is all to unsigned?


Thanks,
Sasha
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