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Mon, 08 Jun 2020 08:17:29 -0700 (PDT) Date: Mon, 8 Jun 2020 20:47:27 +0530 From: afzal mohammed To: Arnd Bergmann Subject: Re: ARM: vmsplit 4g/4g Message-ID: <20200608151727.GA5017@afzalpc> References: <20200514111755.GA4997@afzalpc> <20200514133545.GA5020@afzalpc> <20200516060624.GA6371@afzalpc> <20200607125932.GA4576@afzalpc> <20200608111834.GB5736@afzalpc> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.3 (2018-01-21) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200608_081731_975861_65B2E9F0 X-CRM114-Status: UNSURE ( 9.33 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Russell King , Linux ARM , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On Mon, Jun 08, 2020 at 04:43:57PM +0200, Arnd Bergmann wrote: > There is another difference: get_user_pages_fast() does not return > a vm_area_struct pointer, which is where you would check the access > permissions. I suppose those pointers could not be returned to callers > that don't already hold the mmap_sem. Ok, thanks for the details, i need to familiarize better with mm. Regards afzal _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel