From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793211738; b=MX94KCvaC8tRCKbW4yNCEdjkysXi8ZlPLO6iJQL5ghIQGS7egyqUmgd6mdpHAWFv8ZgH ABxeoJPxBSmGxegzai3TQp1IsxC3ZpGBE4yb/7/2+1rLmFAlT66knVkuOqYO2Ps6fzjaX juvrmMOtzNQywosWFUS+m17ez5he7SFHpdRxtGOjg+P9nj4DBoSNAlAt4Md1DKfIbJPWm j8UZ6UCK9nrZquXAv32/in0BGItvCWGLjpp0AQKS0YZqifU5xv5Sop7xPyOEELeSQKT0l imKDCtqlljGqUHRY/HK2UeVg06+sTFQp2O6mFmWxqtv+9OARwW+7GCMqmNU32jIafrA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793211738; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=ouTNDl0tPWcTWNBI//ClV7hte4tTx3c8Gor4AJQcKVE=; b=K/LkuGhAZ3caQ2CMSNM4SU2+SL3eRhojNX3kmsbhWPT4YWeH1J1CMykgG7fRSmoEn+7K i0g5pQBJAurgTzz28lCmSJyskzZswyJvKMSIO7FLZwWLw6GrqBDy6bFn/QGe9f2dAe+km 9YKyNT8YlamDmO3/0pVZLcDaTyit1Kn0czdtgnT58lUdwNtFvldCYKDUht+/UHZNh0+36 6ddsVma0ka+0j/BJ106nwKjkSu4b9Du5+BNdVuVJnw2r3tIh58jkCqKmcpSDB+M++iXMq 3X06cl2fDqqmYNB8O2U+78v3EyKApqMm5RArhooDVky4qQOyX4+dcxzBB9x1vy9iBRw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b="kJWZw/7t"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E80D606A326; Wed, 28 Oct 2026 18:22:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=kJWZw/7t Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5DC1D1F01825; Wed, 28 Oct 2026 18:22:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793211737; bh=ouTNDl0tPWcTWNBI//ClV7hte4tTx3c8Gor4AJQcKVE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kJWZw/7tAzoQuAEgzZw02K7ER6BrzlUu8esOx//RFP8fUtuGW5TcQ2v7jCNkEbJYS 1NT2Qxnu2IZd3G2gyAmKtPpF75mQINlgHFKiVm45GQSWJY6ygudcvGfc+ZXP9BEMrc gGft0V9wKO5wObp99eNrRBJdkeLtQPq8gMc1Rvmk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, kernel test robot , Keith Busch , Dinh Nguyen , Sasha Levin Subject: [PATCH 5.15 483/571] nios2: fix __wsum type degradation in csum_fold() Date: Wed, 28 Oct 2026 18:00:30 +0100 Message-ID: <20261028170019.485506609@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170008.009143722@linuxfoundation.org> References: <20261028170008.009143722@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Keith Busch [ Upstream commit b963f2345fa20417401c51a69dedb6a58eea33a9 ] csum_fold() shifts a bitwise __wsum type, which sparse reports as "restricted __wsum degrades to integer". Sparse only checks the body of a static inline once something instantiates it, so this went unnoticed until a recent block layer change added the first csum_fold() caller to a file built on this architecture. Force cast to a __u32 for the shift, as the other architectures do. Fixes: eea9507a69d6 ("nios2: Library functions") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202609222053.5gjiJjtb-lkp@intel.com/ Signed-off-by: Keith Busch Signed-off-by: Dinh Nguyen Signed-off-by: Sasha Levin --- arch/nios2/include/asm/checksum.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/nios2/include/asm/checksum.h b/arch/nios2/include/asm/checksum.h index 69004e07a1ba3..b6b415ae17a08 100644 --- a/arch/nios2/include/asm/checksum.h +++ b/arch/nios2/include/asm/checksum.h @@ -27,7 +27,7 @@ static inline __sum16 csum_fold(__wsum sum) "add %0, %0, r8\n" "nor %0, %0, %0\n" : "=r" (sum) - : "r" (sum << 16), "0" (sum) + : "r" ((__force u32)sum << 16), "0" (sum) : "r8"); return (__force __sum16) sum; } -- 2.53.0