From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Subject: [PATCH 2/4] net: i825xx: Use absolute_pointer for memcpy on fixed memory location Date: Sun, 12 Sep 2021 09:01:47 -0700 Message-ID: <20210912160149.2227137-3-linux@roeck-us.net> References: <20210912160149.2227137-1-linux@roeck-us.net> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=tyfgbpEWB0om8tzf9mpCL7ZcoNm2ky582Pji67hHRFQ=; b=FipBo31bo4Y9wn2cwKQRxkhXZxLWCn+R45DcIskkVp75c1TgMGyjogwJwyZOXFC4tv stoxC1TbwWGQ+SVkngtXViHocHoaVTtD2BBYiJPvDjNTybowvZ5OzMJ0BvcZBw1tSFVV WvuF8X0N5/D8+gT4APANqLNRhq+59UrNncv3vpGQBPma8SCO7gYwVE6iGXjpUZDSx5LK Mrre1qNJSrKUOp7Bz8xYEI5VjP5yPoQFMHyY65D1co3w7stKAEc0MHHesMO+X31r8VOS nbGd99VOHdmPbZHJyPppMEZ1X8zmprSmHfblrUwwAkfgGe5JEZF/CJPrdQSQaVVyJAYv OeTg== Sender: Guenter Roeck In-Reply-To: <20210912160149.2227137-1-linux@roeck-us.net> List-ID: Content-Type: text/plain; charset="us-ascii" To: Linus Torvalds Cc: Richard Henderson , Ivan Kokshaysky , Matt Turner , "James E . J . Bottomley" , Helge Deller , "David S . Miller" , Jakub Kicinski , linux-alpha@vger.kernel.org, Geert Uytterhoeven , linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, netdev@vger.kernel.org, linux-sparse@vger.kernel.org, Guenter Roeck gcc 11.x reports the following compiler warning/error. drivers/net/ethernet/i825xx/82596.c: In function 'i82596_probe': ./arch/m68k/include/asm/string.h:72:25: error: '__builtin_memcpy' reading 6 bytes from a region of size 0 [-Werror=stringop-overread] Use absolute_address() to work around the problem. Cc: Geert Uytterhoeven Signed-off-by: Guenter Roeck --- drivers/net/ethernet/i825xx/82596.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/i825xx/82596.c b/drivers/net/ethernet/i825xx/82596.c index b8a40146b895..b482f6f633bd 100644 --- a/drivers/net/ethernet/i825xx/82596.c +++ b/drivers/net/ethernet/i825xx/82596.c @@ -1144,7 +1144,7 @@ static struct net_device * __init i82596_probe(void) err = -ENODEV; goto out; } - memcpy(eth_addr, (void *) 0xfffc1f2c, ETH_ALEN); /* YUCK! Get addr from NOVRAM */ + memcpy(eth_addr, absolute_pointer(0xfffc1f2c), ETH_ALEN); /* YUCK! Get addr from NOVRAM */ dev->base_addr = MVME_I596_BASE; dev->irq = (unsigned) MVME16x_IRQ_I596; goto found; -- 2.33.0