From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Hubbard Subject: [PATCH 06/19] vfio: fix FOLL_LONGTERM use, simplify get_user_pages_remote() call Date: Sun, 24 Nov 2019 20:19:58 -0800 Message-ID: <20191125042011.3002372-7-jhubbard@nvidia.com> References: <20191125042011.3002372-1-jhubbard@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from hqemgate15.nvidia.com (hqemgate15.nvidia.com [216.228.121.64]) by gabe.freedesktop.org (Postfix) with ESMTPS id 41B8D89DEA for ; Mon, 25 Nov 2019 04:20:18 +0000 (UTC) In-Reply-To: <20191125042011.3002372-1-jhubbard@nvidia.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Andrew Morton Cc: Michal Hocko , Jan Kara , kvm@vger.kernel.org, linux-doc@vger.kernel.org, David Airlie , Dave Chinner , dri-devel@lists.freedesktop.org, LKML , linux-mm@kvack.org, Paul Mackerras , linux-kselftest@vger.kernel.org, Ira Weiny , Jonathan Corbet , linux-rdma@vger.kernel.org, Michael Ellerman , Christoph Hellwig , Jason Gunthorpe , Jason Gunthorpe , Vlastimil Babka , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , linux-media@vger.kernel.org, Shuah Khan , John Hubbard , linux-block@vger.kernel.org, =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Al Viro List-Id: dri-devel@lists.freedesktop.org VXBkYXRlIFZGSU8gdG8gdGFrZSBhZHZhbnRhZ2Ugb2YgdGhlIHJlY2VudGx5IGxvb3NlbmVkIHJl c3RyaWN0aW9uIG9uCkZPTExfTE9OR1RFUk0gd2l0aCBnZXRfdXNlcl9wYWdlc19yZW1vdGUoKS4g QWxzbywgbm93IGl0IGlzIHBvc3NpYmxlIHRvCmZpeCBhIGJ1ZzogdGhlIFZGSU8gY2FsbGVyIGlz IGxvZ2ljYWxseSBhIEZPTExfTE9OR1RFUk0gdXNlciwgYnV0IGl0Cndhc24ndCBzZXR0aW5nIEZP TExfTE9OR1RFUk0uCgpBbHNvLCByZW1vdmUgYW4gdW5uZXNzYXJ5IHBhaXIgb2YgY2FsbHMgdGhh dCB3ZXJlIHJlbGVhc2luZyBhbmQKcmVhY3F1aXJpbmcgdGhlIG1tYXBfc2VtLiBUaGVyZSBpcyBu byBuZWVkIHRvIGF2b2lkIGhvbGRpbmcgbW1hcF9zZW0KanVzdCBpbiBvcmRlciB0byBjYWxsIHBh 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Hubbard To: Andrew Morton Subject: [PATCH 06/19] vfio: fix FOLL_LONGTERM use, simplify get_user_pages_remote() call Date: Sun, 24 Nov 2019 20:19:58 -0800 Message-ID: <20191125042011.3002372-7-jhubbard@nvidia.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191125042011.3002372-1-jhubbard@nvidia.com> References: <20191125042011.3002372-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1574655612; bh=8L6xDPC0B530xp/MTT0aA3xB5v7i2RtCewyab6Z4Hgg=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=d+2WX6jvpItLi8hNFhPqgSpccod4/P1VedoLoAUgl/dUgX7PZO6N7wBlZmwSg9eaC JDoIk9NMTDlA4l9zJjH3iUwXrO660bdn4DOaMUaxD5jqFFsjyNE4Ws0tzcw3sMa0PT jRAPtCqgsiOHw7iGHselnEaqe7tWX/6qfOKoiyK1odt80sAGYjsCrC3bOMKAsoELgZ wodPgnOQcdT0fNwRDK6Rpt1RK8EcyIMe4SlgEQ19JcKVQSwURCxwHLqWDO7sVnbgRr 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bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "David S . Miller" , Mike Kravetz Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Message-ID: <20191125041958.vvo7gTN_aNkUOz8mdvMEig92ZEgoszqinB_TForNueA@z> VXBkYXRlIFZGSU8gdG8gdGFrZSBhZHZhbnRhZ2Ugb2YgdGhlIHJlY2VudGx5IGxvb3NlbmVkIHJl c3RyaWN0aW9uIG9uCkZPTExfTE9OR1RFUk0gd2l0aCBnZXRfdXNlcl9wYWdlc19yZW1vdGUoKS4g QWxzbywgbm93IGl0IGlzIHBvc3NpYmxlIHRvCmZpeCBhIGJ1ZzogdGhlIFZGSU8gY2FsbGVyIGlz IGxvZ2ljYWxseSBhIEZPTExfTE9OR1RFUk0gdXNlciwgYnV0IGl0Cndhc24ndCBzZXR0aW5nIEZP TExfTE9OR1RFUk0uCgpBbHNvLCByZW1vdmUgYW4gdW5uZXNzYXJ5IHBhaXIgb2YgY2FsbHMgdGhh dCB3ZXJlIHJlbGVhc2luZyBhbmQKcmVhY3F1aXJpbmcgdGhlIG1tYXBfc2VtLiBUaGVyZSBpcyBu byBuZWVkIHRvIGF2b2lkIGhvbGRpbmcgbW1hcF9zZW0KanVzdCBpbiBvcmRlciB0byBjYWxsIHBh Z2VfdG9fcGZuKCkuCgpBbHNvLCBub3cgdGhhdCB0aGUgdGhlIERBWCBjaGVjayAoImlmIGEgVk1B IGlzIERBWCwgZG9uJ3QgYWxsb3cgbG9uZwp0ZXJtIHBpbm5pbmciKSBpcyBpbiB0aGUgaW50ZXJu YWxzIG9mIGdldF91c2VyX3BhZ2VzX3JlbW90ZSgpIGFuZApfX2d1cF9sb25ndGVybV9sb2NrZWQo KSwgdGhlcmUncyBubyBuZWVkIGZvciBpdCBhdCB0aGUgVkZJTyBjYWxsIHNpdGUuClNvIHJlbW92 ZSBpdC4KClRlc3RlZC1ieTogQWxleCBXaWxsaWFtc29uIDxhbGV4LndpbGxpYW1zb25AcmVkaGF0 LmNvbT4KQWNrZWQtYnk6IEFsZXggV2lsbGlhbXNvbiA8YWxleC53aWxsaWFtc29uQHJlZGhhdC5j b20+ClJldmlld2VkLWJ5OiBKYXNvbiBHdW50aG9ycGUgPGpnZ0BtZWxsYW5veC5jb20+ClJldmll d2VkLWJ5OiBJcmEgV2VpbnkgPGlyYS53ZWlueUBpbnRlbC5jb20+ClN1Z2dlc3RlZC1ieTogSmFz b24gR3VudGhvcnBlIDxqZ2dAemllcGUuY2E+CkNjOiBEYW4gV2lsbGlhbXMgPGRhbi5qLndpbGxp YW1zQGludGVsLmNvbT4KQ2M6IEplcm9tZSBHbGlzc2UgPGpnbGlzc2VAcmVkaGF0LmNvbT4KU2ln bmVkLW9mZi1ieTogSm9obiBIdWJiYXJkIDxqaHViYmFyZEBudmlkaWEuY29tPgotLS0KIGRyaXZl cnMvdmZpby92ZmlvX2lvbW11X3R5cGUxLmMgfCAzMCArKysrKy0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCA1IGluc2VydGlvbnMoKyksIDI1IGRlbGV0aW9ucygtKQoK ZGlmZiAtLWdpdCBhL2RyaXZlcnMvdmZpby92ZmlvX2lvbW11X3R5cGUxLmMgYi9kcml2ZXJzL3Zm aW8vdmZpb19pb21tdV90eXBlMS5jCmluZGV4IDJhZGE4ZTZjZGI4OC4uYjgwMGZjOWEwMjUxIDEw MDY0NAotLS0gYS9kcml2ZXJzL3ZmaW8vdmZpb19pb21tdV90eXBlMS5jCisrKyBiL2RyaXZlcnMv dmZpby92ZmlvX2lvbW11X3R5cGUxLmMKQEAgLTMyMiw3ICszMjIsNiBAQCBzdGF0aWMgaW50IHZh ZGRyX2dldF9wZm4oc3RydWN0IG1tX3N0cnVjdCAqbW0sIHVuc2lnbmVkIGxvbmcgdmFkZHIsCiB7 CiAJc3RydWN0IHBhZ2UgKnBhZ2VbMV07CiAJc3RydWN0IHZtX2FyZWFfc3RydWN0ICp2bWE7Ci0J c3RydWN0IHZtX2FyZWFfc3RydWN0ICp2bWFzWzFdOwogCXVuc2lnbmVkIGludCBmbGFncyA9IDA7 CiAJaW50IHJldDsKIApAQCAtMzMwLDMzICszMjksMTQgQEAgc3RhdGljIGludCB2YWRkcl9nZXRf cGZuKHN0cnVjdCBtbV9zdHJ1Y3QgKm1tLCB1bnNpZ25lZCBsb25nIHZhZGRyLAogCQlmbGFncyB8 PSBGT0xMX1dSSVRFOwogCiAJZG93bl9yZWFkKCZtbS0+bW1hcF9zZW0pOwotCWlmIChtbSA9PSBj dXJyZW50LT5tbSkgewotCQlyZXQgPSBnZXRfdXNlcl9wYWdlcyh2YWRkciwgMSwgZmxhZ3MgfCBG T0xMX0xPTkdURVJNLCBwYWdlLAotCQkJCSAgICAgdm1hcyk7Ci0JfSBlbHNlIHsKLQkJcmV0ID0g Z2V0X3VzZXJfcGFnZXNfcmVtb3RlKE5VTEwsIG1tLCB2YWRkciwgMSwgZmxhZ3MsIHBhZ2UsCi0J CQkJCSAgICB2bWFzLCBOVUxMKTsKLQkJLyoKLQkJICogVGhlIGxpZmV0aW1lIG9mIGEgdmFkZHJf Z2V0X3BmbigpIHBhZ2UgcGluIGlzCi0JCSAqIHVzZXJzcGFjZS1jb250cm9sbGVkLiBJbiB0aGUg ZnMtZGF4IGNhc2UgdGhpcyBjb3VsZAotCQkgKiBsZWFkIHRvIGluZGVmaW5pdGUgc3RhbGxzIGlu IGZpbGVzeXN0ZW0gb3BlcmF0aW9ucy4KLQkJICogRGlzYWxsb3cgYXR0ZW1wdHMgdG8gcGluIGZz LWRheCBwYWdlcyB2aWEgdGhpcwotCQkgKiBpbnRlcmZhY2UuCi0JCSAqLwotCQlpZiAocmV0ID4g MCAmJiB2bWFfaXNfZnNkYXgodm1hc1swXSkpIHsKLQkJCXJldCA9IC1FT1BOT1RTVVBQOwotCQkJ cHV0X3BhZ2UocGFnZVswXSk7Ci0JCX0KLQl9Ci0JdXBfcmVhZCgmbW0tPm1tYXBfc2VtKTsKLQor CXJldCA9IGdldF91c2VyX3BhZ2VzX3JlbW90ZShOVUxMLCBtbSwgdmFkZHIsIDEsIGZsYWdzIHwg Rk9MTF9MT05HVEVSTSwKKwkJCQkgICAgcGFnZSwgTlVMTCwgTlVMTCk7CiAJaWYgKHJldCA9PSAx KSB7CiAJCSpwZm4gPSBwYWdlX3RvX3BmbihwYWdlWzBdKTsKLQkJcmV0dXJuIDA7CisJCXJldCA9 IDA7CisJCWdvdG8gZG9uZTsKIAl9CiAKLQlkb3duX3JlYWQoJm1tLT5tbWFwX3NlbSk7Ci0KIAl2 YWRkciA9IHVudGFnZ2VkX2FkZHIodmFkZHIpOwogCiAJdm1hID0gZmluZF92bWFfaW50ZXJzZWN0 aW9uKG1tLCB2YWRkciwgdmFkZHIgKyAxKTsKQEAgLTM2Niw3ICszNDYsNyBAQCBzdGF0aWMgaW50 IHZhZGRyX2dldF9wZm4oc3RydWN0IG1tX3N0cnVjdCAqbW0sIHVuc2lnbmVkIGxvbmcgdmFkZHIs CiAJCWlmIChpc19pbnZhbGlkX3Jlc2VydmVkX3BmbigqcGZuKSkKIAkJCXJldCA9IDA7CiAJfQot Citkb25lOgogCXVwX3JlYWQoJm1tLT5tbWFwX3NlbSk7CiAJcmV0dXJuIHJldDsKIH0KLS0gCjIu MjQuMAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJp LWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBz Oi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJpLWRldmVs