From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 251BEC12002 for ; Wed, 21 Jul 2021 15:17:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F380161245 for ; Wed, 21 Jul 2021 15:17:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239731AbhGUOgt (ORCPT ); Wed, 21 Jul 2021 10:36:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:33114 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238083AbhGUOgs (ORCPT ); Wed, 21 Jul 2021 10:36:48 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 245B061246; Wed, 21 Jul 2021 15:17:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626880644; bh=/uBtyK2U7BD8Q45Q0cNkKmotxwn41fmtF4LDSn7thOw=; h=From:To:Cc:Subject:Date:From; b=Nkd0f/MdfW+V4naOY7BF+n2vt8NvlY8HbOXbeoPnnGiOxARh026DwRAFhettuAwq4 8Ldot67fdGtVCkqngyHShRw+H4h6XAVYthtiuQPHtb/yQTE4P4iUCgWrfyv/sUvsTn mKW66Lmb5EvLKiwTrGBT2QNvitLVcbRPH6WLWjMjd82L0EMy56R25LOfJwV8wJ26uj LUoVoeWAnt+VPuFgaHOOil2J9YesjRn5NckMCFipm++/oWtm6zlsv/u5K2+8zvCQ3K hKItmXCAyz8VcAd/jjrUJ1vRu5M0ia/ZQhrNxV3CTWhiHG3xvU6C2j8tz7HNk9fYXy fsbtiEdp8xCnw== From: Arnd Bergmann To: Andrey Ryabinin , Russell King , Ard Biesheuvel , Mike Rapoport , Abbott Liu Cc: Arnd Bergmann , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Florian Fainelli , Linus Walleij , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] ARM: kasan: work around LPAE build warning Date: Wed, 21 Jul 2021 17:16:59 +0200 Message-Id: <20210721151706.2439073-1-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnd Bergmann pgd_page_vaddr() returns an 'unsigned long' address, causing a warning with the memcpy() call in kasan_init(): arch/arm/mm/kasan_init.c: In function 'kasan_init': include/asm-generic/pgtable-nop4d.h:44:50: error: passing argument 2 of '__memcpy' makes pointer from integer without a cast [-Werror=int-conversion] 44 | #define pgd_page_vaddr(pgd) ((unsigned long)(p4d_pgtable((p4d_t){ pgd }))) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | long unsigned int arch/arm/include/asm/string.h:58:45: note: in definition of macro 'memcpy' 58 | #define memcpy(dst, src, len) __memcpy(dst, src, len) | ^~~ arch/arm/mm/kasan_init.c:229:16: note: in expansion of macro 'pgd_page_vaddr' 229 | pgd_page_vaddr(*pgd_offset_k(KASAN_SHADOW_START)), | ^~~~~~~~~~~~~~ arch/arm/include/asm/string.h:21:47: note: expected 'const void *' but argument is of type 'long unsigned int' 21 | extern void *__memcpy(void *dest, const void *src, __kernel_size_t n); | ~~~~~~~~~~~~^~~ Avoid this by adding an explicit typecast. Fixes: 5615f69bc209 ("ARM: 9016/2: Initialize the mapping of KASan shadow memory") Signed-off-by: Arnd Bergmann --- arch/arm/mm/kasan_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index 9c348042a724..4b1619584b23 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -226,7 +226,7 @@ void __init kasan_init(void) BUILD_BUG_ON(pgd_index(KASAN_SHADOW_START) != pgd_index(KASAN_SHADOW_END)); memcpy(tmp_pmd_table, - pgd_page_vaddr(*pgd_offset_k(KASAN_SHADOW_START)), + (void*)pgd_page_vaddr(*pgd_offset_k(KASAN_SHADOW_START)), sizeof(tmp_pmd_table)); set_pgd(&tmp_pgd_table[pgd_index(KASAN_SHADOW_START)], __pgd(__pa(tmp_pmd_table) | PMD_TYPE_TABLE | L_PGD_SWAPPER)); -- 2.29.2