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Message-ID: <20170914155051.8289-11-alexander.levin@verizon.com> Date: Thu, 14 Sep 2017 15:51:07 +0000 From: "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "stable@...r.kernel.org" <stable@...r.kernel.org> Cc: Marcin Nowakowski <marcin.nowakowski@...tec.com>, "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>, Ralf Baechle <ralf@...ux-mips.org>, "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com> Subject: [PATCH for 4.9 11/59] MIPS: fix mem=X@Y commandline processing 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); -- 2.11.0
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