From: Jamie Lokier <jamie@shareable.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ulrich Drepper <drepper@redhat.com>,
munroesj@us.ibm.com, "H. Peter Anvin" <hpa@zytor.com>,
David Miller <davem@davemloft.net>,
ralf@linux-mips.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel@teksavvy.com,
torvalds@linux-foundation.org
Subject: Re: 64-syscall args on 32-bit vs syscall()
Date: Wed, 17 Mar 2010 09:18:20 +0000 [thread overview]
Message-ID: <20100317091820.GA8149@shareable.org> (raw)
In-Reply-To: <1268816179.2335.187.camel@pasglop>
Benjamin Herrenschmidt wrote:
> Hence, apps that use the first form today because it works on x86 would
> end up working at least on powerpc where they would have been otherwise
> broken unless they used some arch specific #ifdef to do the second form.
I think what Ulrich is getting at is your change will break existing
code which already does:
#ifdef __powerpc__
syscall(SYS_foo, 0, my_64bit_arg);
#else
syscall(SYS_foo, my_64bit_arg);
#endif
I don't know of any such code, but it might be out there.
-- Jamie
next prev parent reply other threads:[~2010-03-17 9:19 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-15 4:48 64-syscall args on 32-bit vs syscall() Benjamin Herrenschmidt
2010-03-15 5:06 ` David Miller
2010-03-15 5:18 ` Benjamin Herrenschmidt
2010-03-15 5:54 ` David Miller
2010-03-15 20:22 ` Benjamin Herrenschmidt
2010-03-15 13:44 ` Ralf Baechle
2010-03-15 15:13 ` H. Peter Anvin
2010-03-15 16:00 ` Ulrich Drepper
2010-03-15 19:00 ` David Miller
2010-03-15 19:41 ` H. Peter Anvin
2010-03-15 20:35 ` Benjamin Herrenschmidt
2010-03-15 20:41 ` H. Peter Anvin
2010-03-16 21:56 ` Steven Munroe
2010-03-17 0:31 ` Benjamin Herrenschmidt
2010-03-17 5:52 ` Ulrich Drepper
2010-03-17 8:56 ` Benjamin Herrenschmidt
2010-03-17 9:14 ` Ulrich Drepper
2010-03-17 10:13 ` Benjamin Herrenschmidt
2010-03-17 9:18 ` Jamie Lokier [this message]
2010-03-17 10:18 ` Benjamin Herrenschmidt
2010-03-17 18:30 ` H. Peter Anvin
2010-03-17 20:35 ` Benjamin Herrenschmidt
2010-03-17 20:53 ` H. Peter Anvin
2010-03-17 22:58 ` Benjamin Herrenschmidt
2010-03-18 16:08 ` Steven Munroe
2010-03-18 16:21 ` Andreas Schwab
2010-03-18 17:03 ` Steven Munroe
2010-03-18 21:18 ` Benjamin Herrenschmidt
2010-03-19 1:22 ` Jamie Lokier
2010-03-15 20:27 ` Benjamin Herrenschmidt
2010-03-15 15:03 ` Steven Munroe
2010-03-15 20:32 ` Benjamin Herrenschmidt
2010-03-15 15:04 ` Jamie Lokier
2010-03-15 20:33 ` Benjamin Herrenschmidt
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