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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Guenter Roeck <linux@roeck-us.net>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Sasha Levin <sashal@kernel.org>,
	davem@davemloft.net, kuba@kernel.org, arnd@arndb.de,
	netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 08/15] net: i825xx: Use absolute_pointer for memcpy from fixed memory location
Date: Wed, 22 Sep 2021 23:39:22 -0400	[thread overview]
Message-ID: <20210923033929.1421446-8-sashal@kernel.org> (raw)
In-Reply-To: <20210923033929.1421446-1-sashal@kernel.org>

From: Guenter Roeck <linux@roeck-us.net>

[ Upstream commit dff2d13114f0beec448da9b3716204eb34b0cf41 ]

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_pointer() to work around the problem.

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 d719668a6684..8efcec305fc5 100644
--- a/drivers/net/ethernet/i825xx/82596.c
+++ b/drivers/net/ethernet/i825xx/82596.c
@@ -1155,7 +1155,7 @@ struct net_device * __init i82596_probe(int unit)
 			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;
-- 
2.30.2


  parent reply	other threads:[~2021-09-23  3:41 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-23  3:39 [PATCH AUTOSEL 4.19 01/15] ibmvnic: check failover_pending in login response Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 02/15] net: macb: fix use after free on rmmod Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 03/15] net: stmmac: allow CSR clock of 300MHz Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 04/15] m68k: Double cast io functions to unsigned long Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 05/15] xen/balloon: use a kernel thread instead a workqueue Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 06/15] nvme-multipath: fix ANA state updates when a namespace is not present Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 07/15] compiler.h: Introduce absolute_pointer macro Sasha Levin
2021-09-23  3:39 ` Sasha Levin [this message]
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 09/15] sparc: avoid stringop-overread errors Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 10/15] qnx4: " Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 11/15] parisc: Use absolute_pointer() to define PAGE0 Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 12/15] arm64: Mark __stack_chk_guard as __ro_after_init Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 13/15] alpha: Declare virt_to_phys and virt_to_bus parameter as pointer to volatile Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 14/15] net: 6pack: Fix tx timeout and slot time Sasha Levin
2021-09-23  3:39 ` [PATCH AUTOSEL 4.19 15/15] spi: Fix tegra20 build with CONFIG_PM=n Sasha Levin

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