From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 07 Mar 2023 11:16:14 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1pZUMg-00CChj-1U for lore@lore.pengutronix.de; Tue, 07 Mar 2023 11:16:14 +0100 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pZUMf-0007yW-Of for lore@pengutronix.de; Tue, 07 Mar 2023 11:16:14 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=pxkXb5WrgX252niQXkyPrGa6ynBN8QK/TpQtApAc1co=; b=SnL1TN08PKR5+TX8aldjYUbO+1 tjqwcNZWQ+AExBg+vRXNzOA33fUSvwD9wfB1Ris4YCXKwHv/dM+ifzs2lM7I0PErFC/pfjCqirML8 3MrwZO8KH1HmTFtFyLZSLwWzkWOG6J6KqQOq4UwlhdDrr5IH8Yasj46KKnUzW5CDTc522Gzh0DQ/S 5yLbe02CNvIuWxs+D7YZLnJhFaaE8q3KUQOOzSkczfVtCOSDgAjPwv+W4DmuN4rxNCGUzaILpdwXi 0FPu2ky0gYNqPl1iZPKSP5GGFJKeOgCqXdhJRZPt5RaqRJnb34hK46enJdwFggRUe5UFXQpQcU0R7 BEv5N/Cw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pZULY-00HBdI-K2; Tue, 07 Mar 2023 10:15:04 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pZULL-00HBYj-GD for barebox@lists.infradead.org; Tue, 07 Mar 2023 10:14:54 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pZULJ-0007Mx-Sp; Tue, 07 Mar 2023 11:14:49 +0100 Received: from [2a0a:edc0:0:1101:1d::54] (helo=dude05.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1pZULJ-002SWg-7R; Tue, 07 Mar 2023 11:14:49 +0100 Received: from afa by dude05.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1pZULH-008iWl-Rl; Tue, 07 Mar 2023 11:14:47 +0100 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Tue, 7 Mar 2023 11:14:45 +0100 Message-Id: <20230307101446.2077676-4-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230307101446.2077676-1-a.fatoum@pengutronix.de> References: <20230307101446.2077676-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230307_021451_620856_3862F821 X-CRM114-Status: GOOD ( 11.02 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.8 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH master 4/5] ARM: i.MX8M: silence warning accessing bootrom log in zero page X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) We don't compile with --param=min-pagesize=0, so GCC will complain about dereference of (void *)0x9e0, even if done through a volatile pointer. We know this to be okay, because either we run in PBL before MMU is set up or we run in barebox proper and zero_page_access() will be temporarily disabling trapping by the null page. Thus hide the access from the compiler to silence the warning. Signed-off-by: Ahmad Fatoum --- arch/arm/mach-imx/romapi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-imx/romapi.c b/arch/arm/mach-imx/romapi.c index 0936c855fd03..b241e633ea01 100644 --- a/arch/arm/mach-imx/romapi.c +++ b/arch/arm/mach-imx/romapi.c @@ -57,10 +57,13 @@ int imx8mn_bootrom_load_image(void) const u32 *imx8m_get_bootrom_log(void) { if (current_el() == 3) { + ulong *rom_log_addr_offset = (void *)0x9e0; ulong rom_log_addr; + OPTIMIZER_HIDE_VAR(rom_log_addr_offset); + zero_page_access(); - rom_log_addr = readl(IOMEM(0x9e0)); + rom_log_addr = *rom_log_addr_offset; zero_page_faulting(); if (rom_log_addr < MX8M_OCRAM_BASE_ADDR || -- 2.30.2