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b=jwkDTJxWUY6KwlZSk6WT9YT2IlZ+8Rqv/UghvqpLOhobg2LjDRzbQFFMj5hyUFM2dlacz2MNKioL51t99cVaLJ0lW00cB1WSMKqhHCCNA2XDnSWM1WYiCr0U8xe3Hg6z31UlTBTVMVld2xGNTh1yiS/+B9OsCR683lzig343vWI= Authentication-Results: vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=none action=none header.from=windriver.com; Received: from BY5PR11MB4241.namprd11.prod.outlook.com (2603:10b6:a03:1ca::13) by BY5PR11MB4103.namprd11.prod.outlook.com (2603:10b6:a03:18c::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4129.28; Wed, 19 May 2021 04:41:18 +0000 Received: from BY5PR11MB4241.namprd11.prod.outlook.com ([fe80::551b:e310:2ae4:3011]) by BY5PR11MB4241.namprd11.prod.outlook.com ([fe80::551b:e310:2ae4:3011%6]) with mapi id 15.20.4129.032; Wed, 19 May 2021 04:41:18 +0000 Subject: Re: [PATCH 3/4] ARM: change vmalloc_min to vmalloc_start To: "Russell King (Oracle)" Cc: rppt@kernel.org, ardb@kernel.org, linus.walleij@linaro.org, akpm@linux-foundation.org, carver4lio@163.com, tiantao6@hisilicon.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20210518120633.GW12395@shell.armlinux.org.uk> From: "Xu, Yanfei" Message-ID: Date: Wed, 19 May 2021 12:41:10 +0800 User-Agent: Mozilla/5.0 (X11; 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charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/18/21 8:15 PM, Russell King (Oracle) wrote: > [Please note: This e-mail is from an EXTERNAL e-mail address] > > Change the current vmalloc_min, which is supposed to be the lowest > address of vmalloc space including the VMALLOC_OFFSET, to vmalloc_start > which does not include VMALLOC_OFFSET. > > Signed-off-by: Russell King (Oracle) > --- > arch/arm/mm/mmu.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c > index d932c46a02e0..457203b41ceb 100644 > --- a/arch/arm/mm/mmu.c > +++ b/arch/arm/mm/mmu.c > @@ -1123,8 +1123,7 @@ void __init debug_ll_io_init(void) > } > #endif > > -static unsigned long __initdata vmalloc_min = > - VMALLOC_END - (240 << 20) - VMALLOC_OFFSET; > +static unsigned long __initdata vmalloc_start = VMALLOC_END - (240 << 20); > > /* > * vmalloc=size forces the vmalloc area to be exactly 'size' > @@ -1142,14 +1141,14 @@ static int __init early_vmalloc(char *arg) > vmalloc_reserve >> 20); > } > > - vmalloc_max = VMALLOC_END - (PAGE_OFFSET + SZ_32M); > + vmalloc_max = VMALLOC_END - (PAGE_OFFSET + SZ_32M + VMALLOC_OFFSET); > if (vmalloc_reserve > vmalloc_max) { > vmalloc_reserve = vmalloc_max; > pr_warn("vmalloc area is too big, limiting to %luMB\n", > vmalloc_reserve >> 20); > } > > - vmalloc_min = VMALLOC_END - vmalloc_reserve; > + vmalloc_start = VMALLOC_END - vmalloc_reserve; > return 0; > } > early_param("vmalloc", early_vmalloc); > @@ -1169,7 +1168,8 @@ void __init adjust_lowmem_bounds(void) > * and may itself be outside the valid range for which phys_addr_t > * and therefore __pa() is defined. > */ > - vmalloc_limit = (u64)vmalloc_min - PAGE_OFFSET + PHYS_OFFSET; > + vmalloc_limit = (u64)vmalloc_start - > + (PAGE_OFFSET + PHYS_OFFSET + VMALLOC_OFFSET); > Here is bug, it should be vmalloc_limit = (u64)vmalloc_start - (PAGE_OFFSET + VMALLOC_OFFSET) + PHYS_OFFSET; > /* > * The first usable region must be PMD aligned. Mark its start > -- > 2.20.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel