linux-kernel - Re: [UPDATED PATCH] fix memory corruption from misinterpreted bad_inode

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Message-ID: <20070104232106.GK35756@gaz.sfgoth.com>
Date:	Thu, 4 Jan 2007 15:21:06 -0800
From:	Mitchell Blank Jr <mitch@...oth.com>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Al Viro <viro@....linux.org.uk>, Eric Sandeen <sandeen@...hat.com>,
	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [UPDATED PATCH] fix memory corruption from misinterpreted bad_inode_ops return values

Linus Torvalds wrote:
> Well, that probably would work, but it's also true that returning a 64-bit 
> value on a 32-bit platform really _does_ depend on more than the size.

Yeah, obviously this is restricted to the signed-integer case.  My point
was just that you could have the compiler figure out which variant to pick
for loff_t automatically.

> "let's not play tricks with function types at all".

I think I agree.  The real (but harder) fix for the wasted space issue
would be to get the toolchain to automatically combine functions that
end up compiling into identical assembly.

-Mitch
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