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[209.85.220.65]) by mx.google.com with SMTPS id o68-v6sor7650920qte.4.2018.10.24.18.27.56 for (Google Transport Security); Wed, 24 Oct 2018 18:27:56 -0700 (PDT) Received-SPF: pass (google.com: domain of rafael.tinoco@linaro.org designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=czusButT; spf=pass (google.com: domain of rafael.tinoco@linaro.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=rafael.tinoco@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=UNa/t9rRC91BV1dr6X2f7W55SSKjZ97xlXgIrbqUXUI=; b=czusButTMN/uNzZZ34Q/SnvIXJTZGsPDvsZkvMWCP06ciWNUUewL2u+Mk4gIEK+5pS Jl69asx44T/guF4j9st0f8xCtIaf2J2Zen6gezzkS9bNTT3KYA104atxfbmjv2KTPVpz AB79j5x8+322Hkx+uqUzAddml6RAuZkfiErss= X-Google-Smtp-Source: AJdET5cgYb5IslnZt4MnUgHoRLzvTixKiJXHSxbbYyNsixS8+sNs2YynFxCm53xEsNQae/XBHrD3CA== X-Received: by 2002:aed:2554:: with SMTP id w20-v6mr4736913qtc.183.1540430876020; Wed, 24 Oct 2018 18:27:56 -0700 (PDT) Received: from workstation.celeiro.br ([138.204.25.17]) by smtp.gmail.com with ESMTPSA id m6-v6sm5338994qta.50.2018.10.24.18.27.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Oct 2018 18:27:54 -0700 (PDT) From: Rafael David Tinoco To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, Rafael David Tinoco , Russell King , Mark Brown , Sergey Senozhatsky , Nitin Gupta , Minchan Kim Subject: [PATCH 2/2] mm/zsmalloc.c: fix zsmalloc ARM LPAE support Date: Wed, 24 Oct 2018 22:27:45 -0300 Message-Id: <20181025012745.20884-2-rafael.tinoco@linaro.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181025012745.20884-1-rafael.tinoco@linaro.org> References: <20181025012745.20884-1-rafael.tinoco@linaro.org> MIME-Version: 1.0 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: X-Virus-Scanned: ClamAV using ClamSMTP Since commit 02390b87a945 ("mm/zsmalloc: Prepare to variable MAX_PHYSMEM_BITS"), an architecture has to define this value in order to guarantee that zsmalloc will be able to encode and decode the obj value properly. Similar to that change, this one sets the value for ARM LPAE, fixing a possible null-ptr-deref in zs_map_object() when using ARM LPAE and HIGHMEM pages located above the 4GB watermark. Link: https://bugs.linaro.org/show_bug.cgi?id=3765#c17 Signed-off-by: Rafael David Tinoco --- arch/arm/include/asm/pgtable-3level-types.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/include/asm/pgtable-3level-types.h b/arch/arm/include/asm/pgtable-3level-types.h index 921aa30259c4..bd4994f98700 100644 --- a/arch/arm/include/asm/pgtable-3level-types.h +++ b/arch/arm/include/asm/pgtable-3level-types.h @@ -67,4 +67,6 @@ typedef pteval_t pgprot_t; #endif /* STRICT_MM_TYPECHECKS */ +#define MAX_POSSIBLE_PHYSMEM_BITS 36 + #endif /* _ASM_PGTABLE_3LEVEL_TYPES_H */