From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-co1nam03on0107.outbound.protection.outlook.com ([104.47.40.107]:43410 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753331AbeDIAR7 (ORCPT ); Sun, 8 Apr 2018 20:17:59 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Vladimir Murzin , Russell King , Sasha Levin Subject: [PATCH AUTOSEL for 4.15 052/189] ARM: 8738/1: Disable CONFIG_DEBUG_VIRTUAL for NOMMU Date: Mon, 9 Apr 2018 00:17:27 +0000 Message-ID: <20180409001637.162453-52-alexander.levin@microsoft.com> References: <20180409001637.162453-1-alexander.levin@microsoft.com> In-Reply-To: <20180409001637.162453-1-alexander.levin@microsoft.com> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: From: Vladimir Murzin [ Upstream commit c7780ab56c091a9ba95a3278e6e1d9c73afb5052 ] While running MPS2 platform (NOMMU) with DTB placed below PHYS_OFFSET following warning poped up: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at arch/arm/mm/physaddr.c:42 __virt_to_phys+0x2f/0x4= 0 virt_to_phys used for non-linear address: 00004000 (0x4000) CPU: 0 PID: 0 Comm: swapper Not tainted 4.15.0-rc1-5a31bf2-clean+ #2767 Hardware name: MPS2 (Device Tree Support) [<2100bf39>] (unwind_backtrace) from [<2100b3ff>] (show_stack+0xb/0xc) [<2100b3ff>] (show_stack) from [<2100e697>] (__warn+0x87/0xac) [<2100e697>] (__warn) from [<2100e6db>] (warn_slowpath_fmt+0x1f/0x28) [<2100e6db>] (warn_slowpath_fmt) from [<2100c603>] (__virt_to_phys+0x2f/0x4= 0) [<2100c603>] (__virt_to_phys) from [<2116a499>] (early_init_fdt_reserve_sel= f+0xd/0x24) [<2116a499>] (early_init_fdt_reserve_self) from [<2116222d>] (arm_memblock_= init+0xb5/0xf8) [<2116222d>] (arm_memblock_init) from [<21161cad>] (setup_arch+0x38b/0x50e) [<21161cad>] (setup_arch) from [<21160455>] (start_kernel+0x31/0x280) [<21160455>] (start_kernel) from [<00000000>] ( (null)) random: get_random_bytes called from init_oops_id+0x17/0x2c with crng_init= =3D0 ---[ end trace 0000000000000000 ]--- Platforms without MMU support run with 1:1 (i.e. linear) memory mapping, so disable CONFIG_DEBUG_VIRTUAL. Fixes: e377cd8221eb ("ARM: 8640/1: Add support for CONFIG_DEBUG_VIRTUAL") Signed-off-by: Vladimir Murzin Signed-off-by: Russell King Signed-off-by: Sasha Levin --- arch/arm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 51c8df561077..2c7e23e206da 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -4,7 +4,7 @@ config ARM default y select ARCH_CLOCKSOURCE_DATA select ARCH_DISCARD_MEMBLOCK if !HAVE_ARCH_PFN_VALID - select ARCH_HAS_DEBUG_VIRTUAL + select ARCH_HAS_DEBUG_VIRTUAL if MMU select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_SET_MEMORY --=20 2.15.1