From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9F714256C8B; Tue, 3 Feb 2026 23:05:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770159908; cv=none; b=f3Lhkm3p8zIAfu7XLHRf/FPG8fHVwJFpywtXqG6Fnl24PfRjY4rtgIVDT6ALCX4ZA2ploxukMir4s7ump9RlLOB4ZTraLtczj9OIA4Yo+oftftq3UTJeMK7uXmnRKv5ehraWabng+oGqzPThRgRLzb52fKON/LtQ0boG1d06/E4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770159908; c=relaxed/simple; bh=lN5NzvZ82FzppvYfl5Zxnhq1rcu3CVXlKFcuFq5Szzk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=DDLHaFE21/PCbCqMZq3e2JQlHAp4ZMmhN0WZHG6+aOyTPLiRizAoR7K4ig4pSyEXOhgN4TeW/gkSCNq4W25pW/QbQ7l7WLDFwcAu6I1uyAdq+HG1upO+6c+Jq2bkyJf5tR3Enetr56DJBlRFYx7uEIQ3F03cyhwb5I7NO9byUes= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lGCdj6tL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lGCdj6tL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31AE2C116D0; Tue, 3 Feb 2026 23:05:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770159908; bh=lN5NzvZ82FzppvYfl5Zxnhq1rcu3CVXlKFcuFq5Szzk=; h=From:To:Cc:Subject:Date:From; b=lGCdj6tLVoca6tFwoCt+cfnQxh7lz9kjlAXcBtEgDTC+Rc2BmHprV6nnwO1+XGFfa dJT2JbBgS5zfAfEqnFVSS0Tv0pjVO1RXQUmY6cY1DnxmLTVVkFBnk/UE6Q99lb4rjd rc+d6EG72HJw/W12RQ8lcabHNDyYuBnhgjYNMKvQErc0bGJqCOU9s3F+DfUcswdjcL uG5hYBBbs6h5WiqgGQb8rptfL3YoBrlJkA1CKLMjPi9sQKNruIJqVJ1iYy9TR1ZU+L pUXDI9uDh9fZpi7Kd3hQLnClxJb0RPAIwuBboyO2JaXGvIuZmJCjyPnlydP2OF2qYl NtxIhq/l5Jx0g== From: Arnd Bergmann To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Andrew J. Gallatin" , Brice Goglin , Jeff Garzik Cc: Arnd Bergmann , Ingo Molnar , Thomas Gleixner , Bjorn Helgaas , Lukas Wunner , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] myri10ge: avoid passing uninitialized data to inline asm Date: Wed, 4 Feb 2026 00:04:51 +0100 Message-Id: <20260203230501.832872-1-arnd@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Arnd Bergmann Building with gcc-16.0.1 find a bug with the inline asm: In file included from include/linux/io.h:12, from drivers/net/ethernet/myricom/myri10ge/myri10ge.c:43: In function '__const_memcpy_toio_aligned64', inlined from '__iowrite64_copy' at arch/arm64/include/asm/io.h:249:3, inlined from 'myri10ge_dummy_rdma' at drivers/net/ethernet/myricom/myri10ge/myri10ge.c:535:2: arch/arm64/include/asm/io.h:206:17: error: '*(const u64 *)(&buf[6])' is used uninitialized [-Werror=uninitialized] 206 | asm volatile("str %x0, [%8, #8 * 0]\n" | ^~~ Set the extra fields to zero before writing them to hardware. Fixes: 0da34b6dfe55 ("[PATCH] Add Myri-10G Ethernet driver") Signed-off-by: Arnd Bergmann --- drivers/net/ethernet/myricom/myri10ge/myri10ge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c index 7be30a8df268..cea28aa971cc 100644 --- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c +++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c @@ -508,7 +508,7 @@ static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp) static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable) { char __iomem *submit; - __be32 buf[16] __attribute__ ((__aligned__(8))); + __be32 buf[16] __attribute__ ((__aligned__(8))) = {}; u32 dma_low, dma_high; int i; -- 2.39.5