From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f52.google.com (mail-pa0-f52.google.com [209.85.220.52]) by kanga.kvack.org (Postfix) with ESMTP id BC73D6B0038 for ; Wed, 9 Sep 2015 18:45:00 -0400 (EDT) Received: by pacfv12 with SMTP id fv12so23083594pac.2 for ; Wed, 09 Sep 2015 15:45:00 -0700 (PDT) Received: from COL004-OMC4S7.hotmail.com (col004-omc4s7.hotmail.com. [65.55.34.209]) by mx.google.com with ESMTPS id jf11si13943858pbd.111.2015.09.09.15.44.59 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 09 Sep 2015 15:45:00 -0700 (PDT) Message-ID: From: Chen Gang Subject: Re: [PATCH] mm/mmap.c: Remove useless statement "vma = NULL" in find_vma() Date: Thu, 10 Sep 2015 06:44:59 +0800 In-Reply-To: <55F0B6C2.2000706@hotmail.com> References: <20150909162605.GA4373@redhat.com>,<55F0B6C2.2000706@hotmail.com> Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: "oleg@redhat.com" Cc: Andrew Morton , "kirill.shutemov@linux.intel.com" , "riel@redhat.com" , Michal Hocko , "sasha.levin@oracle.com" , "pfeiner@google.com" , "aarcange@redhat.com" , "vishnu.ps@samsung.com" , Linux Memory , kernel mailing list Ck9uIDkvMTAvMTUgMDA6MjYsIE9sZWcgTmVzdGVyb3Ygd3JvdGU6Cj4gT24gMDkvMDgsIENoZW4g R2FuZyB3cm90ZToKPj4KPj4gSSBhbHNvIHdhbnQgdG8gY29uc3VsdDogdGhlIGNvbW1lbnRzIG9m IGZpbmRfdm1hKCkgc2F5czoKPgo+IFNvcnJ5LCBJIGRvbid0IHVuZGVyc3RhbmQgdGhlIHF1ZXN0 aW9uIDspCj4KPj4gIkxvb2sgdXAgdGhlIGZpcnN0IFZNQSB3aGljaCBzYXRpc2ZpZXMgYWRkciA8 IHZtX2VuZCwgLi4uIgo+Pgo+PiBJcyBpdCBPSz8KPgo+IFdoeSBub3Q/Cj4KCldlIHdpbGwgY29u dGludWUgZGlzY3VzcyBhYm91dCBpdCBiZWxvdy4gUGxlYXNlIGhlbHAgY2hlY2ssIHRoYW5rcy4K Cj4+ICh3aHkgbm90ICJ2bV9zdGFydCA8PSBhZGRyIDwgdm1fZW5kIiksCj4KPiBCZWNhdXNlIHRo aXMgc29tZSBjYWxsZXJzIGFjdHVhbGx5IHdhbnQgdG8gZmluZCB0aGUgMXN0IHZtYSB3aGljaAo+ IHNhdGlzZmllcyBhZGRyIDwgdm1fZW5kPyBGb3IgZXhhbXBsZSwgc2hpZnRfYXJnX3BhZ2VzKCku Cj4KPiBPVE9ILCBJIHRoaW5rIHRoYXQgYW5vdGhlciBoZWxwZXIsCj4KPiBmaW5kX3ZtYV94eHgo bW0sIGFkZHIpCj4gewo+IHZtYSA9IGZpbmRfdm1hKC4uLikKPiBpZiAodm1hICYmIHZtYS0+dm1f c3RhcnQ+IGFkZHIpCj4gdm1hID0gTlVMTDsKPiByZXR1cm4gdm1hOwo+IH0KPgo+IG1ha2VzIHNl bnNlLiBJdCBjYW4gaGF2ZSBhIGxvdCBvZiB1c2Vycy4KPgoKT0suIHRoYW5rIHlvdSB2ZXJ5IG11 Y2guIDotKQoKPj4gbmVlZCB3ZSBsZXQgInZtYSA9IHRtcCIKPj4gaW4gImlmICh0bXAtPnZtX3N0 YXJ0IDw9IGFkZHIpIj8gLS0gaXQgbG9va3MgdGhlIGNvbW1lbnRzIGlzIG5vdCBtYXRjaAo+PiB0 aGUgaW1wbGVtZW50YXRpb24sIHByZWNpc2VseSAobWF5YmUgbm90IDFzdCBWTUEpLgo+Cj4gVGhp cyBjb250cmFkaWN0cyB3aXRoIGFib3ZlLi4uIEkgbWVhbiwgaXQgaXMgbm90IGNsZWFyIHdoYXQg ZXhhY3RseSBkbwo+IHlvdSBibGFtZSwgc2VtYW50aWNzIG9yIGltcGxlbWVudGF0aW9uLgo+Cj4g VGhlIGltcGxlbWVudGF0aW9uIGxvb2tzIGNvcnJlY3QuIFdoeSBkbyB5b3UgdGhpbmsgaXQgY2Fu IGJlIG5vdCAxc3Qgdm1hPwo+CgpJdCBpcyBpbiB3aGlsZSAocmJfbm9kZSkgey4uLn0uCgotIFdo ZW4gd2Ugc2V0ICJ2bWEgPSB0bXAiLCBpdCBpcyBhbHJlYXkgbWF0Y2ggImFkZHIgPCB2bV9lbmQi LgoKLSBJZiAiYWRkcj49IHZtX3N0YXJ0Iiwgd2UgcmV0dXJuIHRoaXMgdm1hIChlbHNlIGNvbnRp bnVlIHNlYXJjaGluZykuCgpJZiAidGhlIGZpcnN0IGxlZnQiIGlzIHRoZSByZWFsIGZpcnN0LCB3 aGVuICJhZGRyPj0gdm1fc3RhcnQiLCBpdAp3aWxsIHJldHVybiAobWF5IG5vdCByZXR1cm4gMXN0 IGxlZnQgbWF0Y2hlZCB2bWEpLgoKSWYgInRoZSBmaXJzdCBmaW5kIiBpcyB0aGUgcmVhbCBmaXJz dCwgd2hlbiAiYWRkciA8IHZtX3N0YXJ0IiwgaXQKd2lsbCBjb250aW51ZSBzZWFyY2hpbmcgKG1h eSBub3QgcmV0dXJuIDFzdCBmaW5kIG1hdGNoZWQgdm1hKS4KCkZvciBtZSwgaWYgd2Ugb25seSBm b2N1cyBvbiAiYWRkciA8IHZtX2VuZCIsIHdlIG5lZWQgcmVtb3ZlICJ2bV9zdGFydCA8PQphZGRy IiBjaGVja2luZykuIElmIHdlIGhhdmUgdG8gY29uc2lkZXIgYWJvdXQgImFkZHI+PSB2bV9zdGFy dCIsIHdlIG1heQpuZWVkIGFkZGl0aW9uYWwgcGFyYW1ldGVyIG9yIGltcGxlbWVudCBhIG5ldyBm dW5jdGlvbiBmb3IgaXQuCgoKV2VsY29tZSBhbnkgaWRlYXMsIHN1Z2dlc3Rpb25zIGFuZCBjb21w bGV0aW9ucy4KCgpUaGFua3MuCi0tCkNoZW4gR2FuZyAos8K41SkKCk9wZW4sIHNoYXJlLCBhbmQg YXR0aXR1ZGUgbGlrZSBhaXIsIHdhdGVyLCBhbmQgbGlmZSB3aGljaCBHb2QgYmxlc3NlZAogCQkg CSAgIAkJICA= -- 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