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Fri, 17 Jul 2020 09:10:55 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id B7742305C22; Fri, 17 Jul 2020 11:10:53 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 9C15329CF6F4E; Fri, 17 Jul 2020 11:10:53 +0200 (CEST) Date: Fri, 17 Jul 2020 11:10:53 +0200 From: Peter Zijlstra To: ira.weiny@intel.com Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , x86@kernel.org, Dave Hansen , Dan Williams , Vishal Verma , Andrew Morton , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH RFC V2 12/17] memremap: Add zone device access protection Message-ID: <20200717091053.GZ10769@hirez.programming.kicks-ass.net> References: <20200717072056.73134-1-ira.weiny@intel.com> <20200717072056.73134-13-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200717072056.73134-13-ira.weiny@intel.com> X-Rspamd-Queue-Id: 32940184558E5 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 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 Fri, Jul 17, 2020 at 12:20:51AM -0700, ira.weiny@intel.com wrote: > +static pgprot_t dev_protection_enable_get(struct dev_pagemap *pgmap, pgprot_t prot) > +{ > + if (pgmap->flags & PGMAP_PROT_ENABLED && dev_page_pkey != PKEY_INVALID) { > + pgprotval_t val = pgprot_val(prot); > + > + static_branch_inc(&dev_protection_static_key); > + prot = __pgprot(val | _PAGE_PKEY(dev_page_pkey)); > + } > + return prot; > +} Every other pgprot modifying function is called pgprot_*(), although I suppose we have the exceptions phys_mem_access_prot() and dma_pgprot(). How about we call this one devm_pgprot() ?