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Shutemov" , Michal Hocko , Mike Kravetz , Andrea Arcangeli , Matthew Wilcox , linux-kernel@vger.kernel.org Subject: Re: [PATCHv2] mm/migrate: clean up useless code in migrate_vma_collect_pmd() Message-ID: <20190816132102.GA10848@mypc> References: <20190807052858.GA9749@mypc> <1565167272-21453-1-git-send-email-kernelfans@gmail.com> <20190815171918.GC30916@redhat.com> <20190815194021.GB9253@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190815194021.GB9253@redhat.com> User-Agent: Mutt/1.11.3 (2019-02-01) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Aug 15, 2019 at 03:40:21PM -0400, Jerome Glisse wrote: > On Thu, Aug 15, 2019 at 12:23:44PM -0700, Ralph Campbell wrote: > [...] > > > > I don't understand. The only use of "pfn" I see is in the "else" > > clause above where it is set just before using it. > > Ok i managed to confuse myself with mpfn and probably with old > version of the code. Sorry for reading too quickly. Can we move > unsigned long pfn; into the else { branch so that there is no > more confusion to its scope. Looks better, I will update v3. Thanks, Pingfan