From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f71.google.com (mail-pg0-f71.google.com [74.125.83.71]) by kanga.kvack.org (Postfix) with ESMTP id EF7736B026B for ; Wed, 4 Jul 2018 02:52:09 -0400 (EDT) Received: by mail-pg0-f71.google.com with SMTP id n3-v6so2019449pgp.21 for ; Tue, 03 Jul 2018 23:52:09 -0700 (PDT) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTPS id b17-v6si2731581pls.467.2018.07.03.23.52.08 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 03 Jul 2018 23:52:08 -0700 (PDT) From: Zhang Yi Subject: [PATCH 1/3] kvm: remove redundant reserved page check Date: Wed, 4 Jul 2018 23:30:11 +0800 Message-Id: <3266d45a10db6d22e3978eacbe2683d43aec3100.1530716899.git.yi.z.zhang@linux.intel.com> In-Reply-To: References: Sender: owner-linux-mm@kvack.org List-ID: To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, pbonzini@redhat.com, dan.j.williams@intel.com, jack@suse.cz, hch@lst.de, yu.c.zhang@intel.com Cc: linux-mm@kvack.org, rkrcmar@redhat.com, yi.z.zhang@intel.com, Zhang Yi PageReserved() is already checked inside kvm_is_reserved_pfn(), remove it from kvm_set_pfn_dirty(). Signed-off-by: Zhang Yi Signed-off-by: Zhang Yu --- virt/kvm/kvm_main.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index c7b2e92..afb2e6e 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1673,12 +1673,8 @@ EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); void kvm_set_pfn_dirty(kvm_pfn_t pfn) { - if (!kvm_is_reserved_pfn(pfn)) { - struct page *page = pfn_to_page(pfn); - - if (!PageReserved(page)) - SetPageDirty(page); - } + if (!kvm_is_reserved_pfn(pfn)) + SetPageDirty(pfn_to_page(pfn)); } EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); -- 2.7.4