Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752479AbXINGor (ORCPT ); Fri, 14 Sep 2007 02:44:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750997AbXINGoj (ORCPT ); Fri, 14 Sep 2007 02:44:39 -0400 Received: from rv-out-0910.google.com ([209.85.198.187]:14730 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750758AbXINGoi (ORCPT ); Fri, 14 Sep 2007 02:44:38 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=cz2ktgsB5Sgthqahe7pWqucYkSpd72GgW0vX1kGDsH+tIgZQ6dVtS4JJqPbMtAB3hcQ20TflpgEbovszMgzytDfLqQhP1LxZq39oaOM9ktvHSL0iFV5xHW72DKColDZpekIta938jegMDthub0bsS3bsQL/OoZ9gi9O+Xj2UXZM= Message-ID: <8bd0f97a0709132344w136f2df5ncfe4496c6c895bd8@mail.gmail.com> Date: Fri, 14 Sep 2007 02:44:37 -0400 From: "Mike Frysinger" To: bryan.wu@analog.com Subject: Re: [Uclinux-dist-devel] Re: [PATCH] Blackfin arch: add some missing syscall Cc: "Bernd Schmidt" , bernd.schmidt@analog.com, linux-arch@vger.kernel.org, "Matthew Wilcox" , "Linux Kernel" , "Paul Mundt" , uclinux-dist-devel@blackfin.uclinux.org, "Andrew Morton" In-Reply-To: <1189748718.5133.23.camel@roc-desktop> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1189670203.30686.15.camel@roc-desktop> <20070913081852.GC17367@parisc-linux.org> <8bd0f97a0709130137l55977c28w95cf8527ae8b9e24@mail.gmail.com> <1189673849.30686.28.camel@roc-desktop> <46E918FD.3070607@t-online.de> <1189748718.5133.23.camel@roc-desktop> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1407 Lines: 33 On 9/14/07, Bryan Wu wrote: > On Thu, 2007-09-13 at 13:03 +0200, Bernd Schmidt wrote: > > Bryan Wu wrote: > > >>> but mremap doesn't -- there's even an implementation in mm/nommu.c. > > >>> Could you check the rest of these over to see if they truly don't need > > >>> to be implemented for no-mmu? > > >> you're right we want mremap, my fault > > >> > > > > > > Yes, I do think so, both sys_mremap and sys_munmap are implemented in > > > mm/nommu.c. How do think of this, Bernd? > > > > There's a mremap in nommu.c, but it doesn't do a lot that is useful. > > With some further mm changes in our tree, it's little more than a fancy > > way of saying munmap, and uClibc does not use it, so there's no > > compelling need to have it in userspace. > > Make sense. So currently Blackfin uClinux use the mremap/munmap in > uClibc? most functions like this dont have any real libc component ... uClibc will define userspace symbols that merely make a syscall iff the __NR_ exists in the headers if we have __NR_mremap in our unistd.h, we'll automagically get the mremap() symbol in uClibc which simply passes along the args to the kernel -mike - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/