From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 94EE4210D514F for ; Wed, 1 Aug 2018 18:47:16 -0700 (PDT) Subject: Re: [RFC PATCH 1/1] device-dax: check for vma range while dax_mmap. References: <12a2ebd8-0f15-7d0a-697c-172ed7f77f92@intel.com> From: "Zhang,Yi" Message-ID: <5aaca496-af2b-71b1-26af-b2400e0bcb43@linux.intel.com> Date: Thu, 2 Aug 2018 17:32:57 +0800 MIME-Version: 1.0 In-Reply-To: <12a2ebd8-0f15-7d0a-697c-172ed7f77f92@intel.com> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: Dave Jiang , linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, dan.j.williams@intel.com, jack@suse.cz, zwisler@kernel.org, yu.c.zhang@intel.com Cc: yi.z.zhang@intel.com List-ID: CgpPbiAyMDE45bm0MDjmnIgwMuaXpSAwMzo0MCwgRGF2ZSBKaWFuZyB3cm90ZToKPgo+IE9uIDA3 LzMxLzIwMTggMDQ6NDYgQU0sIFpoYW5nIFlpIHdyb3RlOgo+PiBJdCBzaG91bGQgYmUgcHJldmVu dCB1c2VyIG1hcCBhbiBpbGxlZ2FsIHZtYSByYW5nZSB3aGljaCBsYXJnZXIgdGhhbgo+PiBkYXgg ZGV2aWNlIHBoaXNjYWwgcmVzb3Vyc2UsIGFzIHdlIGRvbid0IGhhdmUgc3dhcCBsb2dpYyB3aGls ZSBwYWdlCj4+IGZhdWx0aW5nIGluIGRheCBkZXZpY2UuCj4gVGhpcyBwYXRjaCBwcmV2ZW50cyBh IHVzZXIgbWFwcGluZyBhbiBpbGxlZ2FsIHZtYSByYW5nZSB0aGF0IGlzIGxhcmdlcgo+IHRoYW4g YSBkYXggZGV2aWNlIHBoeXNpY2FsIHJlc291cmNlLgo+Cj4+IEFwcGxpY2F0aW9ucywgZXNwZWNh aWxseSBxZW11LCBtYXAgdGhlIC9kZXYvZGF4IGZvciB2aXJ0dWFsIG52ZGltbSdzCj4+IGJhY2tl bmQgZGV2aWNlLCB3ZSBkZWZpbmVkIHRoZSB2LW52ZGltbSBsYWJlbCBhcmVhIGF0IHRoZSBlbmQg b2YgbWFwcGVkCj4+IHJhbmcuIEJ5IHVzaW5nIGFuIGlsbGVnYWwgc2l6ZSB0aGF0IGV4Y2VlZHMg dGhlIHBoeXNpY2FsIHJlc291cmNlIG9mCj4+IC9kZXYvZGF4LCB0aGVuIGl0IHdpbGwgdHJpZ2Vy IHFlbXUgYSBzaWduYWwgZmF1bHQgd2hpbGUgYWNjZXNzaW5nIHRoZXNlCj4+IGxhYmVsIGFyZWEu Cj4gV2hlbiBxZW11IG1hcHMgdGhlIGRheCBkZXZpY2UgZm9yIHZpcnR1YWwgbnZkaW1tJ3MgYmFj a2VuZCBkZXZpY2UsIHRoZQo+IHYtbnZkaW1tIGxhYmVsIGFyZWEgaXMgZGVmaW5lZCBhdCB0aGUg ZW5kIG9mIG1hcHBlZCByYW5nZS4gQnkgdXNpbmcgYW4KPiBpbGxlZ2FsIHNpemUgdGhhdCBleGNl ZWRzIHRoZSByYW5nZSBvZiB0aGUgZGV2aWNlIGRheCwgaXQgd2lsbCB0cmlnZ2VyIGEKPiBmYXVs dCB3aXRoIHFlbXUuClRoYW5rcyBEYXZhLCB0aGF0J3MgY291bGQgYmUgbXVjaCBiZXR0ZXIuCj4K Pj4gU2lnbmVkLW9mZi1ieTogWmhhbmcgWWkgPHlpLnouemhhbmdAbGludXguaW50ZWwuY29tPgo+ PiAtLS0KPj4gIGRyaXZlcnMvZGF4L2RldmljZS5jIHwgMjggKysrKysrKysrKysrKysrKysrKysr KysrKysrKwo+PiAgMSBmaWxlIGNoYW5nZWQsIDI4IGluc2VydGlvbnMoKykKPj4KPj4gZGlmZiAt LWdpdCBhL2RyaXZlcnMvZGF4L2RldmljZS5jIGIvZHJpdmVycy9kYXgvZGV2aWNlLmMKPj4gaW5k ZXggYWZmMmMxNS4uYzlhNTBjZCAxMDA2NDQKPj4gLS0tIGEvZHJpdmVycy9kYXgvZGV2aWNlLmMK Pj4gKysrIGIvZHJpdmVycy9kYXgvZGV2aWNlLmMKPj4gQEAgLTE3Nyw2ICsxNzcsMzIgQEAgc3Rh dGljIGNvbnN0IHN0cnVjdCBhdHRyaWJ1dGVfZ3JvdXAgKmRheF9hdHRyaWJ1dGVfZ3JvdXBzW10g PSB7Cj4+ICAJTlVMTCwKPj4gIH07Cj4+ICAKPj4gK3N0YXRpYyBpbnQgY2hlY2tfdm1hX3Jhbmdl KHN0cnVjdCBkZXZfZGF4ICpkZXZfZGF4LCBzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3QgKnZtYSwKPj4g KwkJY29uc3QgY2hhciAqZnVuYykKPj4gK3sKPj4gKwlzdHJ1Y3QgZGV2aWNlICpkZXYgPSAmZGV2 X2RheC0+ZGV2Owo+PiArCXN0cnVjdCByZXNvdXJjZSAqcmVzOwo+PiArCXVuc2lnbmVkIGxvbmcg c2l6ZTsKPj4gKwlpbnQgcmV0LCBpOwo+PiArCj4+ICsJaWYgKCFkYXhfYWxpdmUoZGV2X2RheC0+ ZGF4X2RldikpCj4+ICsJCXJldHVybiAtRU5YSU87Cj4+ICsKPj4gKwlzaXplID0gdm1hLT52bV9l bmQgLSB2bWEtPnZtX3N0YXJ0ICsgKHZtYS0+dm1fcGdvZmYgPDwgUEFHRV9TSElGVCk7Cj4+ICsJ cmV0ID0gLUVJTlZBTDsKPj4gKwlmb3IgKGkgPSAwOyBpIDwgZGV2X2RheC0+bnVtX3Jlc291cmNl czsgaSsrKSB7Cj4+ICsJCXJlcyA9ICZkZXZfZGF4LT5yZXNbaV07Cj4+ICsJCWlmIChzaXplID4g cmVzb3VyY2Vfc2l6ZShyZXMpKSB7Cj4+ICsJCQlkZXZfaW5mbyhkZXYsICIlczogJXM6IGZhaWws IHZtYSByYW5nZSBpcyBvdmVyZmxvd1xuIiwKPj4gKwkJCQljdXJyZW50LT5jb21tLCBmdW5jKTsK Pj4gKwkJCXJldCA9IC1FSU5WQUw7Cj4+ICsJCQljb250aW51ZTsKPj4gKwkJfSBlbHNlCj4+ICsJ CQlyZXR1cm4gMDsKPj4gKwl9Cj4+ICsJcmV0dXJuIHJldDsKPj4gK30KPj4gKwo+PiAgc3RhdGlj IGludCBjaGVja192bWEoc3RydWN0IGRldl9kYXggKmRldl9kYXgsIHN0cnVjdCB2bV9hcmVhX3N0 cnVjdCAqdm1hLAo+PiAgCQljb25zdCBjaGFyICpmdW5jKQo+PiAgewo+PiBAQCAtNDY1LDYgKzQ5 MSw4IEBAIHN0YXRpYyBpbnQgZGF4X21tYXAoc3RydWN0IGZpbGUgKmZpbHAsIHN0cnVjdCB2bV9h cmVhX3N0cnVjdCAqdm1hKQo+PiAgCSAqLwo+PiAgCWlkID0gZGF4X3JlYWRfbG9jaygpOwo+PiAg CXJjID0gY2hlY2tfdm1hKGRldl9kYXgsIHZtYSwgX19mdW5jX18pOwo+PiArCWlmICghcmMpCj4+ ICsJCXJjIHw9IGNoZWNrX3ZtYV9yYW5nZShkZXZfZGF4LCB2bWEsIF9fZnVuY19fKTsKPiBJIHRo aW5rIHlvdSB3YW50IHRvIGF1Z21lbnQgY2hlY2tfdm1hKCkgcmF0aGVyIHRoYW4gYWRkaW5nIGFu b3RoZXIKPiBmdW5jdGlvbj8gSWYgdGhpcyBpcyBhZGRlZCBpbnNpZGUgY2hlY2tfdm1hKCkgdGhl biB5b3UgY2FuIGFsc28gc2tpcCB0aGUKPiAhZGF4X2FsaXZlKCkgY2hlY2suIERvIHlvdSBleHBl Y3QgdGhpcyBmdW5jdGlvbiB0byBiZSBjYWxsZWQgYW55d2hlcmUgZWxzZT8Kc2luY2UgY2hlY2tf dm1hIHJhbmdlIGFsc28gd2lsbCBiZSBjYWxsZWQgd2hpbGUgZGF4IHBhZ2UgZmF1bHRpbmcuICBJ CmRvbid0IHdhbm5hIHRoaXMgY2hlY2tfdm1hX3JhbmdlIGludHJvZHVjZSBzb21lIGFkZGl0aW9u YWwgd29ya2xvYWQKd2hpbGUgcGFnZSBmYXVsdC4ganVzdCBsZXQgaXQgY2hlY2tlZCBpbiB0aGUg bW1hcCBzY2VuYXJpbwo+Cj4+ICAJZGF4X3JlYWRfdW5sb2NrKGlkKTsKPj4gIAlpZiAocmMpCj4+ ICAJCXJldHVybiByYzsKPj4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCkxpbnV4LW52ZGltbSBtYWlsaW5nIGxpc3QKTGludXgtbnZkaW1tQGxpc3RzLjAx Lm9yZwpodHRwczovL2xpc3RzLjAxLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LW52ZGltbQo=