From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: 64-syscall args on 32-bit vs syscall() Date: Wed, 17 Mar 2010 13:53:00 -0700 Message-ID: <4BA1412C.6070008@zytor.com> References: <20100315134449.GB1653@linux-mips.org> <4B9E4EB1.9010800@zytor.com> <4B9E59B7.6060405@redhat.com> <20100315.120004.209998642.davem@davemloft.net> <4B9E8D67.8040209@zytor.com> <1268685311.2335.38.camel@pasglop> <1268776570.19726.98.camel@spokane1.rchland.ibm.com> <1268785874.2335.137.camel@pasglop> <4BA06E1B.2040706@redhat.com> <1268816179.2335.187.camel@pasglop> <4BA11FD2.2090104@zytor.com> <1268858134.2335.198.camel@pasglop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from terminus.zytor.com ([198.137.202.10]:59375 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751700Ab0CQU5Q (ORCPT ); Wed, 17 Mar 2010 16:57:16 -0400 In-Reply-To: <1268858134.2335.198.camel@pasglop> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Benjamin Herrenschmidt Cc: Ulrich Drepper , munroesj@us.ibm.com, David Miller , ralf@linux-mips.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@teksavvy.com, torvalds@linux-foundation.org On 03/17/2010 01:35 PM, Benjamin Herrenschmidt wrote: > On Wed, 2010-03-17 at 11:30 -0700, H. Peter Anvin wrote: >> Again, this is *exactly* symbol versioning done by hand... we have >> proper symbol versioning, let's use it. > > Yeah, whatever, I don't mind what technique you use for the versionning, > ultimately, if the approach works, we can look at those details :-) We > -do- need the macro to strip the dummy argument though, unless we use > a slightly different technique which is to make the __sysno argument > itself 64-bit, which works as well I believe. > It seems cleaner to do it that way (with a 64-bit sysno arg.) -hpa