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Thu, 17 Jun 2021 14:21:41 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltstX-00Afi9-3T for linux-arm-kernel@lists.infradead.org; Thu, 17 Jun 2021 14:21:25 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1DF6E12FC; Thu, 17 Jun 2021 07:21:19 -0700 (PDT) Received: from C02TD0UTHF1T.local (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 83CBC3F719; Thu, 17 Jun 2021 07:21:16 -0700 (PDT) Date: Thu, 17 Jun 2021 15:20:46 +0100 From: Mark Rutland To: Andy Lutomirski Cc: "Russell King (Oracle)" , the arch/x86 maintainers , Dave Hansen , Linux Kernel Mailing List , linux-mm@kvack.org, Andrew Morton , Mathieu Desnoyers , Nicholas Piggin , "Peter Zijlstra (Intel)" , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE Message-ID: <20210617142046.GA87858@C02TD0UTHF1T.local> References: <2142129092ff9aa00e600c42a26c4015b7f5ceec.1623813516.git.luto@kernel.org> <20210617103524.GA82133@C02TD0UTHF1T.local> <20210617112305.GK22278@shell.armlinux.org.uk> <20210617113349.GB82133@C02TD0UTHF1T.local> <394219d4-36a6-4e7f-a03c-8590551b099a@www.fastmail.com> <20210617135133.GA86101@C02TD0UTHF1T.local> <33241b25-4d45-4278-a4e6-ec9c12b0e1f3@www.fastmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <33241b25-4d45-4278-a4e6-ec9c12b0e1f3@www.fastmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210617_072123_285112_EE006211 X-CRM114-Status: GOOD ( 30.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gVGh1LCBKdW4gMTcsIDIwMjEgYXQgMDc6MDA6MjZBTSAtMDcwMCwgQW5keSBMdXRvbWlyc2tp IHdyb3RlOgo+IAo+IAo+IE9uIFRodSwgSnVuIDE3LCAyMDIxLCBhdCA2OjUxIEFNLCBNYXJrIFJ1 dGxhbmQgd3JvdGU6Cj4gPiBPbiBUaHUsIEp1biAxNywgMjAyMSBhdCAwNjo0MTo0MUFNIC0wNzAw LCBBbmR5IEx1dG9taXJza2kgd3JvdGU6Cj4gCj4gPiA+IEluIGFueSBldmVudCwgSeKAmW0gZXZl biBtb3JlIGNvbnZpbmNlZCB0aGF0IG5vIG5ldyBTWU5DX0NPUkUgYXJjaGVzCj4gPiA+IHNob3Vs ZCBiZSBhZGRlZC4gV2UgbmVlZCBhIG5ldyBBUEkgdGhhdCBqdXN0IGRvZXMgdGhlIHJpZ2h0IHRo aW5nLiAKPiA+IAo+ID4gTXkgaW50dWl0aW9uIGlzIHRoZSBvdGhlciB3YXkgYXJvdW5kLCBhbmQg dGhhdCB0aGlzIGlzIGEgZ25lcmVhbGx5Cj4gPiB1c2VmdWwgdGhpbmcgZm9yIGFyY2hpdGVjdHVy ZXMgdGhhdCByZXF1aXJlIGNvbnRleHQgc3luY2hyb25pemF0aW9uLgo+IAo+IEV4Y2VwdCB0aGF0 IHlvdSBjYW4ndCB1c2UgaXQgaW4gYSBnZW5lcmljIHdheS4gIFlvdSBoYXZlIHRvIGtub3cgdGhl Cj4gc3BlY2lmaWMgcnVsZXMgZm9yIHlvdXIgYXJjaC4KClRoYXQncyBnZW5lcmFsbHkgdHJ1ZSBm b3IgbW9kaWZ5aW5nIGluc3RydWN0aW9uIHN0cmVhbXMgdGhvdWdoPyBUaGUgbWFuCnBhZ2UgZm9y IGNhY2hlZmx1c2goMikgY2FsbHMgb3V0IHRoYXQgaXQgaXMgbm90IHBvcnRhYmxlLgoKSSB0aGlu ayB3aGF0J3MgbmVjZXNzYXJ5IGhlcmUgaXMgc29tZSBtYW5kYXRvcnkgcGVyLWFyY2ggZG9jdW1l bnRhdGlvbj8KCj4gPiBJdCdzIG5vdCBjbGVhciB0byBtZSB3aGF0ICJ0aGUgcmlnaHQgdGhpbmci IHdvdWxkIG1lYW4gc3BlY2lmaWNhbGx5LCBhbmQKPiA+IG9uIGFyY2hpdGVjdHVyZXMgd2l0aCB1 c2Vyc3BhY2UgY2FjaGUgbWFpbnRlbmFuY2UgSklUcyBjYW4gdXN1YWxseSBkbwo+ID4gdGhlIG1v c3Qgb3B0aW1hbCBtYWludGVuYW5jZSwgYW5kIG9ubHkgbmVlZCBoZWxwIGZvciB0aGUgY29udGV4 dAo+ID4gc3luY2hyb25pemF0aW9uLgo+ID4gCj4gCj4gVGhpcyBJIHNpbXBseSBkb24ndCBiZWxp ZXZlIC0tIEkgZG91YnQgdGhhdCBhbnkgc2FuZSBhcmNoaXRlY3R1cmUKPiByZWFsbHkgd29ya3Mg bGlrZSB0aGlzLiAgSSB3cm90ZSBhbiBlbWFpbCBhYm91dCBpdCB0byBJbnRlbCB0aGF0Cj4gYXBw YXJlbnRseSBnZW5lcmF0ZWQgaW50ZXJuYWwgZGlzY3Vzc2lvbiBidXQgbm8gcmVzdWx0cy4gIENv bnNpZGVyOgo+IAo+IG1tYXAoc29tZSBzaGFyZWQgbGlicmFyeSwgc29tZSBwcmV2aW91c2x5IHVu bWFwcGVkIGFkZHJlc3MpOwo+IAo+IHRoaXMgZG9lcyBubyBoZWF2eXdlaWdodCBzeW5jaHJvbml6 YXRpb24sIGF0IGxlYXN0IG9uIHg4Ni4gIFRoZXJlIGlzCj4gbm8gInNlcmlhbGl6aW5nIiBpbnN0 cnVjdGlvbiBpbiB0aGUgZmFzdCBwYXRoLCBhbmQgaXQgKndvcmtzKiBkZXNwaXRlCj4gYW55dGhp bmcgdGhlIFNETSBtYXkgb3IgbWF5IG5vdCBzYXkuCgpTdXJlLCBhbmQgSSBjYWxsZWQgdGhpcyBj YXNlIG91dCBzcGVjaWZpY2FsbHkgd2hlbiBJIHNhaWQ6Cgp8ICAgKiBXaGVyZSB3ZSBjYW4gZ3Vh cmFudGVlIHRoYXQgYSBDUFUgY2Fubm90IHBvc3NpYmx5IGhhdmUgYW4KfCAgICAgaW5zdHJ1Y3Rp b24gaW4tZmxpZ2h0IChlLmcuIGR1ZSB0byBhIGxhY2sgb2YgYSBtYXBwaW5nIHRvIGZldGNoCnwg ICAgIGluc3RydWN0aW9ucyBmcm9tKSwgbm90aGluZyBpcyBuZWNlc3NhcnkuIFRoaXMgaXMgd2hh dCB3ZSByZWx5IG9uCnwgICAgIHdoZW4gZmF1bHRpbmcgaW4gY29kZSBwYWdlcy4gSW4gdGhlc2Ug Y2FzZXMsIHRoZSBDUFUgaXMgbGlhYmxlIHRvCnwgICAgIHRha2UgZmF1bHQgb24gdGhlIG1pc3Np bmcgdHJhbnNsYXRpb24gYW55d2F5LgoKLi4gd2hhdCByZWFsbHkgbWF0dGVycyBpcyB3aGV0aGVy IHRoZSBDUFUgaGFkIHRoZSBvcHBvcHJ0dW5pdHkgdG8gZmV0Y2gKc29tZXRoaW5nIHN0YWxlOyB0 aGUgY29udGV4dCBzeW5jaHJvbml6YXRpb24gaXMgbmVjZXNzYXJ5IHRvIGRpc2NhcmQKdGhhdC4K CkJlYXIgaW4gbWluZCB0aGF0IGluIG1hbnkgY2FzZXMgd2hlcmUgdGhpcyBjb3VsZCBvY2N1ciBp biB0aGVvcnksIHdlCmRvbid0IGhpdCBpbiBwcmFjdGljZSBiZWNhdXNlIENQVXMgZG9uJ3QgaGFw cGVuIHRvIHByZWRpY3Qvc3BlY3VsYXRlIGFzCmFnZ3Jlc3NpdmVseSBhcyB0aGV5IGFyZSBwZXJt aXR0ZWQgdG8uIE9uIGFybS9hcm02NCBpdCdzIG9idmlvdXMgdGhhdAp0aGlzIGlzIGEgcHJvYmxl bSBiZWNhdXNlIHRoZSBkb2N1bWVudGF0aW9uIGNsZWFybHkgZGVmaW5lcyB0aGUKYm91bmRhcmll cyBvZiB3aGF0IGEgQ1BVIGlzIHBlcm1pdHRlZCB0byBkbywgd2hlcmVhcyBvbiBvdGhlcgphcmNo aXRlY3R1cmVzIGRvY3VlbnRhdGlvbiBpcyBub3QgbmVjZXNzYXJpbHkgYXMgY2xlYXIgd2hldGhl ciB0aGlzIGlzCnBlcm1pdGVkIG9yIHdoZXRoZXIgdGhlIGFyY2hpdGVjdHVyZSBtYW5kYXRlcyBh ZGRpdGlvbmFsIGd1YXJhbnRlZXMuCgo+IFdlIGNhbiBhbmQsIElNTywgc2hvdWxkIGRldmVsb3Ag YSBzYW5lIHdheSBmb3IgdXNlciBwcm9ncmFtcyB0bwo+IGluc3RhbGwgaW5zdHJ1Y3Rpb25zIGlu dG8gVk1BcywgZm9yIHNlY3VyaXR5LWNvbnNjaW91cyBzb2Z0d2FyZSB0bwo+IHZlcmlmeSB0aGVt IChieSBzcGxpdHRpbmcgdGhlIHJlYWQgYW5kIHdyaXRlIHNpZGVzPyksIGFuZCBmb3IgdGhlaXIK PiBjb25zdW1lcnMgdG8gZXhlY3V0ZSB0aGVtLCB3aXRob3V0IGtub3dpbmcgYW55IGFyY2ggZGV0 YWlscy4gIEFuZCBJCj4gdGhpbmsgdGhpcyBjYW4gYmUgZG9uZSB3aXRoIG5vIElQSXMgZXhjZXB0 IGZvciBwb3NzaWJsZSBUTEIgZmx1c2hpbmcKPiB3aGVuIG5lZWRlZCwgYXQgbGVhc3Qgb24gbW9z dCBhcmNoaXRlY3R1cmVzLiAgSXQgd291bGQgcmVxdWlyZSBhCj4gbm9udHJpdmlhbCBhbW91bnQg b2YgZGVzaWduIHdvcmssIGFuZCBpdCB3b3VsZCBub3QgcmVzZW1ibGUKPiBzeXNfY2FjaGVmbHVz aCgpIG9yIFNZTkNfQ09SRS4KCkknbSBub3Qgb3Bwb3NlZCB0byBhZGRpbmcgbmV3IGludGVyZmFj ZXMgZm9yIHN0dWZmIGxpa2UgdGhhdCwgYnV0IEkKZG9uJ3QgdGhpbmsgdGhhdCBtZW1iYXJyaWVy KFNZTkNfQ09SRSkgb3IgY2FjaGVmbHVzaCgyKSBhcmUgbmVjZXNzYXJpbHkKd3JvbmcgYXMtaXMu CgpUaGFua3MsCk1hcmsuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxp c3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0 aW5mby9saW51eC1hcm0ta2VybmVsCg==