linux-kernel - Re: 64-syscall args on 32-bit vs syscall()

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Message-ID: <1268947102.2335.236.camel@pasglop>
Date:	Fri, 19 Mar 2010 08:18:22 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	munroesj@...ibm.com
Cc:	Andreas Schwab <schwab@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Ulrich Drepper <drepper@...hat.com>,
	David Miller <davem@...emloft.net>, ralf@...ux-mips.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...savvy.com, torvalds@...ux-foundation.org
Subject: Re: 64-syscall args on 32-bit vs syscall()

On Thu, 2010-03-18 at 12:03 -0500, Steven Munroe wrote:
> Sorry in and long are compatible in 32-bit but not long long.
> 
> int and long are not compatible in 64-bit
> 
> It is hard the keep all the nodes and arguments straight.
> 
> But the concern about changing the prototype and are people actually
> using the prototype are still valid.

Well, using the macro trick instead would fix that problem, code
wouldn't build if it doesn't include unistd.h :-)

Cheers,
Ben.


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