Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751672AbdINS73 (ORCPT ); Thu, 14 Sep 2017 14:59:29 -0400 Received: from mail-vk0-f66.google.com ([209.85.213.66]:35398 "EHLO mail-vk0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751576AbdINS71 (ORCPT ); Thu, 14 Sep 2017 14:59:27 -0400 X-Google-Smtp-Source: AOwi7QBDQ+GvufrqvSC4b2K9fPXDZD5wv8VtgVz/ODvaeIBpxIkR2hojElfZitWIRSAAMKNpQZ4NymKLnwYzgsWyOHE= MIME-Version: 1.0 In-Reply-To: <20170914155051.8289-11-alexander.levin@verizon.com> References: <20170914155051.8289-1-alexander.levin@verizon.com> <20170914155051.8289-11-alexander.levin@verizon.com> From: Mathieu Malaterre Date: Thu, 14 Sep 2017 20:59:05 +0200 X-Google-Sender-Auth: 8IjkiDKBdRNb_vvZvY3_vWXAAMk Message-ID: Subject: Re: [PATCH for 4.9 11/59] MIPS: fix mem=X@Y commandline processing To: "Levin, Alexander (Sasha Levin)" Cc: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" , Marcin Nowakowski , "linux-mips@linux-mips.org" , Ralf Baechle Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1570 Lines: 40 On Thu, Sep 14, 2017 at 5:51 PM, Levin, Alexander (Sasha Levin) wrote: > From: Marcin Nowakowski > > [ Upstream commit 73fbc1eba7ffa3bf0ad12486232a8a1edb4e4411 ] > > When a memory offset is specified through the commandline, add the > memory in range PHYS_OFFSET:Y as reserved memory area. > Otherwise the bootmem allocator is initialised with low page equal to > min_low_pfn = PHYS_OFFSET, and in free_all_bootmem will process pages > starting from min_low_pfn instead of PFN(Y). > > Signed-off-by: Marcin Nowakowski > Cc: linux-mips@linux-mips.org > Patchwork: https://patchwork.linux-mips.org/patch/14613/ > Signed-off-by: Ralf Baechle > Signed-off-by: Sasha Levin > --- > arch/mips/kernel/setup.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c > index f66e5ce505b2..38697f25d168 100644 > --- a/arch/mips/kernel/setup.c > +++ b/arch/mips/kernel/setup.c > @@ -589,6 +589,10 @@ static int __init early_parse_mem(char *p) > start = memparse(p + 1, &p); > > add_memory_region(start, size, BOOT_MEM_RAM); > + > + if (start && start > PHYS_OFFSET) > + add_memory_region(PHYS_OFFSET, start - PHYS_OFFSET, > + BOOT_MEM_RESERVED); > return 0; > } > early_param("mem", early_parse_mem); Does not work on MIPS Creator CI20. See: https://www.spinics.net/lists/stable/msg187229.html