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Date: Wed, 22 Sep 2021 23:40:20 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Guenter Roeck <linux@...ck-us.net>, Geert Uytterhoeven <geert@...ux-m68k.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Sasha Levin <sashal@...nel.org>, davem@...emloft.net, kuba@...nel.org, arnd@...db.de, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 4.9 04/11] net: i825xx: Use absolute_pointer for memcpy from fixed memory location From: Guenter Roeck <linux@...ck-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@...ux-m68k.org> Signed-off-by: Guenter Roeck <linux@...ck-us.net> Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org> Signed-off-by: Sasha Levin <sashal@...nel.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 ce235b776793..299628931bdb 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
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