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Message-ID: <CA+7wUszvyofkuLPb6K+E5ngJ7=e0CiCh1s+WQUBX0cG_MfnU7w@mail.gmail.com> Date: Thu, 14 Sep 2017 20:59:05 +0200 From: Mathieu Malaterre <malat@...ian.org> To: "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "stable@...r.kernel.org" <stable@...r.kernel.org>, Marcin Nowakowski <marcin.nowakowski@...tec.com>, "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>, Ralf Baechle <ralf@...ux-mips.org> Subject: Re: [PATCH for 4.9 11/59] MIPS: fix mem=X@Y commandline processing On Thu, Sep 14, 2017 at 5:51 PM, Levin, Alexander (Sasha Levin) <alexander.levin@...izon.com> wrote: > From: Marcin Nowakowski <marcin.nowakowski@...tec.com> > > [ 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 <marcin.nowakowski@...tec.com> > Cc: linux-mips@...ux-mips.org > Patchwork: https://patchwork.linux-mips.org/patch/14613/ > Signed-off-by: Ralf Baechle <ralf@...ux-mips.org> > Signed-off-by: Sasha Levin <alexander.levin@...izon.com> > --- > 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
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