From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [PATCH v3] arm64, ia64, ppc, s390, sh, tile, um, x86, mm: Remove default gate area Date: Fri, 18 Jul 2014 11:14:16 +0100 Message-ID: <20140718101416.GB1818@arm.com> References: <70f331f59e620dc4e66bd3fa095e6f6b744b532b.1405281639.git.luto@amacapital.net> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: "Linuxppc-dev" To: Andy Lutomirski Cc: "linux-ia64@vger.kernel.org" , "linux-sh@vger.kernel.org" , Catalin Marinas , Heiko Carstens , "linux-mm@kvack.org" , Paul Mackerras , "H. Peter Anvin" , linux-arch , "linux-s390@vger.kernel.org" , Richard Weinberger , X86 ML , Ingo Molnar , Fenghua Yu , "user-mode-linux-devel@lists.sourceforge.net" , Jeff Dike , Chris Metcalf , Thomas Gleixner , "linux-arm-kernel@lists.infradead.org" , Tony Luck , Nathan Lynch List-Id: linux-arch.vger.kernel.org T24gVHVlLCBKdWwgMTUsIDIwMTQgYXQgMDM6NDc6MjZQTSArMDEwMCwgQW5keSBMdXRvbWlyc2tp IHdyb3RlOgo+IE9uIFN1biwgSnVsIDEzLCAyMDE0IGF0IDE6MDEgUE0sIEFuZHkgTHV0b21pcnNr aSA8bHV0b0BhbWFjYXBpdGFsLm5ldD4gd3JvdGU6Cj4gPiBUaGUgY29yZSBtbSBjb2RlIHdpbGwg cHJvdmlkZSBhIGRlZmF1bHQgZ2F0ZSBhcmVhIGJhc2VkIG9uCj4gPiBGSVhBRERSX1VTRVJfU1RB UlQgYW5kIEZJWEFERFJfVVNFUl9FTkQgaWYKPiA+ICFkZWZpbmVkKF9fSEFWRV9BUkNIX0dBVEVf QVJFQSkgJiYgZGVmaW5lZChBVF9TWVNJTkZPX0VIRFIpLgo+ID4KPiA+IFRoaXMgZGVmYXVsdCBp cyBvbmx5IHVzZWZ1bCBmb3IgaWE2NC4gIGFybTY0LCBwcGMsIHMzOTAsIHNoLCB0aWxlLAo+ID4g NjQtYml0IFVNTCwgYW5kIHg4Nl8zMiBoYXZlIHRoZWlyIG93biBjb2RlIGp1c3QgdG8gZGlzYWJs ZSBpdC4gIGFybSwKPiA+IDMyLWJpdCBVTUwsIGFuZCB4ODZfNjQgaGF2ZSBnYXRlIGFyZWFzLCBi dXQgdGhleSBoYXZlIHRoZWlyIG93bgo+ID4gaW1wbGVtZW50YXRpb25zLgo+ID4KPiA+IFRoaXMg Z2V0cyByaWQgb2YgdGhlIGRlZmF1bHQgYW5kIG1vdmVzIHRoZSBjb2RlIGludG8gaWE2NC4KPiA+ Cj4gPiBUaGlzIHNob3VsZCBzYXZlIHNvbWUgY29kZSBvbiBhcmNoaXRlY3R1cmVzIHdpdGhvdXQg YSBnYXRlIGFyZWE6IGl0J3MKPiA+IG5vdyBwb3NzaWJsZSB0byBpbmxpbmUgdGhlIGdhdGVfYXJl YSBmdW5jdGlvbnMgaW4gdGhlIGRlZmF1bHQgY2FzZS4KPiAKPiBDYW4gb25lIG9mIHlvdSBwdWxs IHRoaXMgc29tZXdoZXJlPyAgT3RoZXJ3aXNlIEkgY2FuIHB1dCBpdCBzb21ld2hlcmUKPiBzdGFi bGUgYW5kIGFzayBmb3IgLW5leHQgaW5jbHVzaW9uLCBidXQgdGhhdCBzZWVtcyBsaWtlIG92ZXJr aWxsIGZvciBhCj4gc2luZ2xlIHBhdGNoLgoKSSdkIGJlIGhhcHB5IHRvIHRha2UgdGhlIGFybTY0 IHBhcnQsIGJ1dCBpdCBkb2Vzbid0IGZlZWwgcmlnaHQgZm9yIG1tLyoKY2hhbmdlcyAob3IgY2hh bmdlcyB0byBvdGhlciBhcmNocykgdG8gZ28gdmlhIG91ciB0cmVlLgoKSSdtIG5vdCBzdXJlIHdo YXQgdGhlIGJlc3QgYXBwcm9hY2ggaXMgaWYgeW91IHdhbnQgdG8gc2VuZCB0aGlzIHZpYSBhIHNp bmdsZQp0cmVlLiBNYXliZSB5b3UgY291bGQgYXNrIGFrcG0gbmljZWx5PwoKV2lsbApfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eHBwYy1kZXYgbWFp bGluZyBsaXN0CkxpbnV4cHBjLWRldkBsaXN0cy5vemxhYnMub3JnCmh0dHBzOi8vbGlzdHMub3ps YWJzLm9yZy9saXN0aW5mby9saW51eHBwYy1kZXY= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 18 Jul 2014 11:14:16 +0100 From: Will Deacon Message-ID: <20140718101416.GB1818@arm.com> References: <70f331f59e620dc4e66bd3fa095e6f6b744b532b.1405281639.git.luto@amacapital.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: linuxppc-dev-bounces+geert=linux-m68k.org@lists.ozlabs.org Sender: "Linuxppc-dev" Subject: Re: [PATCH v3] arm64, ia64, ppc, s390, sh, tile, um, x86, mm: Remove default gate area To: Andy Lutomirski Cc: "linux-ia64@vger.kernel.org" , "linux-sh@vger.kernel.org" , Catalin Marinas , Heiko Carstens , "linux-mm@kvack.org" , Paul Mackerras , "H. Peter Anvin" , linux-arch , "linux-s390@vger.kernel.org" , Richard Weinberger , X86 ML , Ingo Molnar , Fenghua Yu , "user-mode-linux-devel@lists.sourceforge.net" , Jeff Dike , Chris Metcalf , Thomas Gleixner , "linux-arm-kernel@lists.infradead.org" , Tony Luck , Nathan Lynch , "linux-kernel@vger.kernel.org" , Martin Schwidefsky , "linux390@de.ibm.com" , "linuxppc-dev@lists.ozlabs.org" List-ID: T24gVHVlLCBKdWwgMTUsIDIwMTQgYXQgMDM6NDc6MjZQTSArMDEwMCwgQW5keSBMdXRvbWlyc2tp IHdyb3RlOgo+IE9uIFN1biwgSnVsIDEzLCAyMDE0IGF0IDE6MDEgUE0sIEFuZHkgTHV0b21pcnNr aSA8bHV0b0BhbWFjYXBpdGFsLm5ldD4gd3JvdGU6Cj4gPiBUaGUgY29yZSBtbSBjb2RlIHdpbGwg cHJvdmlkZSBhIGRlZmF1bHQgZ2F0ZSBhcmVhIGJhc2VkIG9uCj4gPiBGSVhBRERSX1VTRVJfU1RB UlQgYW5kIEZJWEFERFJfVVNFUl9FTkQgaWYKPiA+ICFkZWZpbmVkKF9fSEFWRV9BUkNIX0dBVEVf QVJFQSkgJiYgZGVmaW5lZChBVF9TWVNJTkZPX0VIRFIpLgo+ID4KPiA+IFRoaXMgZGVmYXVsdCBp cyBvbmx5IHVzZWZ1bCBmb3IgaWE2NC4gIGFybTY0LCBwcGMsIHMzOTAsIHNoLCB0aWxlLAo+ID4g NjQtYml0IFVNTCwgYW5kIHg4Nl8zMiBoYXZlIHRoZWlyIG93biBjb2RlIGp1c3QgdG8gZGlzYWJs ZSBpdC4gIGFybSwKPiA+IDMyLWJpdCBVTUwsIGFuZCB4ODZfNjQgaGF2ZSBnYXRlIGFyZWFzLCBi dXQgdGhleSBoYXZlIHRoZWlyIG93bgo+ID4gaW1wbGVtZW50YXRpb25zLgo+ID4KPiA+IFRoaXMg Z2V0cyByaWQgb2YgdGhlIGRlZmF1bHQgYW5kIG1vdmVzIHRoZSBjb2RlIGludG8gaWE2NC4KPiA+ Cj4gPiBUaGlzIHNob3VsZCBzYXZlIHNvbWUgY29kZSBvbiBhcmNoaXRlY3R1cmVzIHdpdGhvdXQg YSBnYXRlIGFyZWE6IGl0J3MKPiA+IG5vdyBwb3NzaWJsZSB0byBpbmxpbmUgdGhlIGdhdGVfYXJl YSBmdW5jdGlvbnMgaW4gdGhlIGRlZmF1bHQgY2FzZS4KPiAKPiBDYW4gb25lIG9mIHlvdSBwdWxs IHRoaXMgc29tZXdoZXJlPyAgT3RoZXJ3aXNlIEkgY2FuIHB1dCBpdCBzb21ld2hlcmUKPiBzdGFi bGUgYW5kIGFzayBmb3IgLW5leHQgaW5jbHVzaW9uLCBidXQgdGhhdCBzZWVtcyBsaWtlIG92ZXJr aWxsIGZvciBhCj4gc2luZ2xlIHBhdGNoLgoKSSdkIGJlIGhhcHB5IHRvIHRha2UgdGhlIGFybTY0 IHBhcnQsIGJ1dCBpdCBkb2Vzbid0IGZlZWwgcmlnaHQgZm9yIG1tLyoKY2hhbmdlcyAob3IgY2hh bmdlcyB0byBvdGhlciBhcmNocykgdG8gZ28gdmlhIG91ciB0cmVlLgoKSSdtIG5vdCBzdXJlIHdo YXQgdGhlIGJlc3QgYXBwcm9hY2ggaXMgaWYgeW91IHdhbnQgdG8gc2VuZCB0aGlzIHZpYSBhIHNp bmdsZQp0cmVlLiBNYXliZSB5b3UgY291bGQgYXNrIGFrcG0gbmljZWx5PwoKV2lsbApfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eHBwYy1kZXYgbWFp bGluZyBsaXN0CkxpbnV4cHBjLWRldkBsaXN0cy5vemxhYnMub3JnCmh0dHBzOi8vbGlzdHMub3ps YWJzLm9yZy9saXN0aW5mby9saW51eHBwYy1kZXY= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cam-admin0.cambridge.arm.com (cam-admin0.cambridge.arm.com [217.140.96.50]) by lists.ozlabs.org (Postfix) with ESMTP id D541D1A07E5 for ; Fri, 18 Jul 2014 20:16:05 +1000 (EST) Date: Fri, 18 Jul 2014 11:14:16 +0100 From: Will Deacon To: Andy Lutomirski Subject: Re: [PATCH v3] arm64, ia64, ppc, s390, sh, tile, um, x86, mm: Remove default gate area Message-ID: <20140718101416.GB1818@arm.com> References: <70f331f59e620dc4e66bd3fa095e6f6b744b532b.1405281639.git.luto@amacapital.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: Cc: "linux-ia64@vger.kernel.org" , "linux-sh@vger.kernel.org" , Catalin Marinas , Heiko Carstens , "linux-mm@kvack.org" , Paul Mackerras , "H. Peter Anvin" , linux-arch , "linux-s390@vger.kernel.org" , Richard Weinberger , X86 ML , Ingo Molnar , Fenghua Yu , "user-mode-linux-devel@lists.sourceforge.net" , Jeff Dike , Chris Metcalf , Thomas Gleixner , "linux-arm-kernel@lists.infradead.org" , Tony Luck , Nathan Lynch , "linux-kernel@vger.kernel.org" , Martin Schwidefsky , "linux390@de.ibm.com" , "linuxppc-dev@lists.ozlabs.org" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Jul 15, 2014 at 03:47:26PM +0100, Andy Lutomirski wrote: > On Sun, Jul 13, 2014 at 1:01 PM, Andy Lutomirski wrote: > > The core mm code will provide a default gate area based on > > FIXADDR_USER_START and FIXADDR_USER_END if > > !defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR). > > > > This default is only useful for ia64. arm64, ppc, s390, sh, tile, > > 64-bit UML, and x86_32 have their own code just to disable it. arm, > > 32-bit UML, and x86_64 have gate areas, but they have their own > > implementations. > > > > This gets rid of the default and moves the code into ia64. > > > > This should save some code on architectures without a gate area: it's > > now possible to inline the gate_area functions in the default case. > > Can one of you pull this somewhere? Otherwise I can put it somewhere > stable and ask for -next inclusion, but that seems like overkill for a > single patch. I'd be happy to take the arm64 part, but it doesn't feel right for mm/* changes (or changes to other archs) to go via our tree. I'm not sure what the best approach is if you want to send this via a single tree. Maybe you could ask akpm nicely? Will From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Fri, 18 Jul 2014 11:14:16 +0100 Subject: [PATCH v3] arm64, ia64, ppc, s390, sh, tile, um, x86, mm: Remove default gate area In-Reply-To: References: <70f331f59e620dc4e66bd3fa095e6f6b744b532b.1405281639.git.luto@amacapital.net> Message-ID: <20140718101416.GB1818@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jul 15, 2014 at 03:47:26PM +0100, Andy Lutomirski wrote: > On Sun, Jul 13, 2014 at 1:01 PM, Andy Lutomirski wrote: > > The core mm code will provide a default gate area based on > > FIXADDR_USER_START and FIXADDR_USER_END if > > !defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR). > > > > This default is only useful for ia64. arm64, ppc, s390, sh, tile, > > 64-bit UML, and x86_32 have their own code just to disable it. arm, > > 32-bit UML, and x86_64 have gate areas, but they have their own > > implementations. > > > > This gets rid of the default and moves the code into ia64. > > > > This should save some code on architectures without a gate area: it's > > now possible to inline the gate_area functions in the default case. > > Can one of you pull this somewhere? Otherwise I can put it somewhere > stable and ask for -next inclusion, but that seems like overkill for a > single patch. I'd be happy to take the arm64 part, but it doesn't feel right for mm/* changes (or changes to other archs) to go via our tree. I'm not sure what the best approach is if you want to send this via a single tree. Maybe you could ask akpm nicely? Will From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f49.google.com (mail-pa0-f49.google.com [209.85.220.49]) by kanga.kvack.org (Postfix) with ESMTP id 04CB86B0035 for ; Fri, 18 Jul 2014 06:16:49 -0400 (EDT) Received: by mail-pa0-f49.google.com with SMTP id hz1so5088709pad.36 for ; Fri, 18 Jul 2014 03:16:46 -0700 (PDT) Received: from cam-admin0.cambridge.arm.com (cam-admin0.cambridge.arm.com. [217.140.96.50]) by mx.google.com with ESMTP id aa10si5431014pac.16.2014.07.18.03.16.42 for ; Fri, 18 Jul 2014 03:16:43 -0700 (PDT) Date: Fri, 18 Jul 2014 11:14:16 +0100 From: Will Deacon Subject: Re: [PATCH v3] arm64,ia64,ppc,s390,sh,tile,um,x86,mm: Remove default gate area Message-ID: <20140718101416.GB1818@arm.com> References: <70f331f59e620dc4e66bd3fa095e6f6b744b532b.1405281639.git.luto@amacapital.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Andy Lutomirski Cc: Catalin Marinas , Tony Luck , Fenghua Yu , Benjamin Herrenschmidt , Paul Mackerras , Martin Schwidefsky , Heiko Carstens , "linux390@de.ibm.com" , Chris Metcalf , Jeff Dike , Richard Weinberger , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Nathan Lynch , X86 ML , linux-arch , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-ia64@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-s390@vger.kernel.org" , "linux-sh@vger.kernel.org" , "user-mode-linux-devel@lists.sourceforge.net" , "linux-mm@kvack.org" On Tue, Jul 15, 2014 at 03:47:26PM +0100, Andy Lutomirski wrote: > On Sun, Jul 13, 2014 at 1:01 PM, Andy Lutomirski wrote: > > The core mm code will provide a default gate area based on > > FIXADDR_USER_START and FIXADDR_USER_END if > > !defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR). > > > > This default is only useful for ia64. arm64, ppc, s390, sh, tile, > > 64-bit UML, and x86_32 have their own code just to disable it. arm, > > 32-bit UML, and x86_64 have gate areas, but they have their own > > implementations. > > > > This gets rid of the default and moves the code into ia64. > > > > This should save some code on architectures without a gate area: it's > > now possible to inline the gate_area functions in the default case. > > Can one of you pull this somewhere? Otherwise I can put it somewhere > stable and ask for -next inclusion, but that seems like overkill for a > single patch. I'd be happy to take the arm64 part, but it doesn't feel right for mm/* changes (or changes to other archs) to go via our tree. I'm not sure what the best approach is if you want to send this via a single tree. Maybe you could ask akpm nicely? Will -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org