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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15F8FC433F5 for ; Mon, 4 Oct 2021 12:54:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E95E4613D5 for ; Mon, 4 Oct 2021 12:54:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233509AbhJDM4l (ORCPT ); Mon, 4 Oct 2021 08:56:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:57754 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233387AbhJDM4U (ORCPT ); Mon, 4 Oct 2021 08:56:20 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 580746139F; Mon, 4 Oct 2021 12:54:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1633352071; bh=PIbSv5+aLo81YMPeqyWAtnVJitmVlGcjP8D8JKUBSBk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=se+tNMLIWhgA4VuXEQu0n/lXE1DySDunsA0yvLf/aUBsC4sDbC5i2pZumEez+Q8xz cKyyBkq+VGZp0TCU/Fdu//Ymvdqpav5y12R5a2xECAD8wThFS8iITv+7Pzf4+8GEI5 0PnGpiDYR4E4H38nkpErVXTW/ca4diMJM6LFN+8c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Guenter Roeck , Arnd Bergmann , Linus Torvalds , Sasha Levin Subject: [PATCH 4.4 21/41] alpha: Declare virt_to_phys and virt_to_bus parameter as pointer to volatile Date: Mon, 4 Oct 2021 14:52:12 +0200 Message-Id: <20211004125027.255850386@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211004125026.597501645@linuxfoundation.org> References: <20211004125026.597501645@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guenter Roeck [ Upstream commit 35a3f4ef0ab543daa1725b0c963eb8c05e3376f8 ] Some drivers pass a pointer to volatile data to virt_to_bus() and virt_to_phys(), and that works fine. One exception is alpha. This results in a number of compile errors such as drivers/net/wan/lmc/lmc_main.c: In function 'lmc_softreset': drivers/net/wan/lmc/lmc_main.c:1782:50: error: passing argument 1 of 'virt_to_bus' discards 'volatile' qualifier from pointer target type drivers/atm/ambassador.c: In function 'do_loader_command': drivers/atm/ambassador.c:1747:58: error: passing argument 1 of 'virt_to_bus' discards 'volatile' qualifier from pointer target type Declare the parameter of virt_to_phys and virt_to_bus as pointer to volatile to fix the problem. Signed-off-by: Guenter Roeck Acked-by: Arnd Bergmann Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- arch/alpha/include/asm/io.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h index 355aec0867f4..e55a5e6ab460 100644 --- a/arch/alpha/include/asm/io.h +++ b/arch/alpha/include/asm/io.h @@ -60,7 +60,7 @@ extern inline void set_hae(unsigned long new_hae) * Change virtual addresses to physical addresses and vv. */ #ifdef USE_48_BIT_KSEG -static inline unsigned long virt_to_phys(void *address) +static inline unsigned long virt_to_phys(volatile void *address) { return (unsigned long)address - IDENT_ADDR; } @@ -70,7 +70,7 @@ static inline void * phys_to_virt(unsigned long address) return (void *) (address + IDENT_ADDR); } #else -static inline unsigned long virt_to_phys(void *address) +static inline unsigned long virt_to_phys(volatile void *address) { unsigned long phys = (unsigned long)address; @@ -111,7 +111,7 @@ static inline dma_addr_t __deprecated isa_page_to_bus(struct page *page) extern unsigned long __direct_map_base; extern unsigned long __direct_map_size; -static inline unsigned long __deprecated virt_to_bus(void *address) +static inline unsigned long __deprecated virt_to_bus(volatile void *address) { unsigned long phys = virt_to_phys(address); unsigned long bus = phys + __direct_map_base; -- 2.33.0