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=1793209951; b=KNeLO9tXDEUNs+ef0r8Oc8Fta2o6JhHrzZGqzX392TvXYgDthUHJeD27CqwI/MtszzkO H/mqM3OCXxKvrShcgD8q61fe+m9YukU1CXvj/Kw3EecFtCSKWEMyGY0LJ/Ozy/6t4CcRd Zs7hjGPwffF9l0Wr2ANOhUgRjrwUY242jgBSef5JkWOrUjLSesC1iQ5LJl0f7ZyvLr+RZ abw4bPlh4/wBWz1kzT5xSJeAkuyXPuIdX5fj/t1u1/mx6xHdzPf56NDNWXi3FxD9avNX9 W1SZwpd9A1SbeUxhKfpIeShdXtidNLDgEk8RBMUsOCH0WzQuScs0vffe5Re7orhgVdw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793209951; 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=x/8BAwcQhuwK00+p0sxmABMVivl6VFS6qc4tNtIgIwk=; b=NdDGfuXTsvaZDdtRX8lwmyV766wWZGOBpDEeG8KWYVkK8cn76agQIuuIjjP2YEKdek4g hEhCAz7p8cP47ukLeyPTZ6bwrPguqn7Gvzr/v4jXBh7L1aLF/ajsmgG3vvC5NoKL8lNos 9Oq6cpCOMD8wKp8Z1y0ftQdNFq/f+Vw7KynncczZQrum9HawFIzdpr3tr07CgDQNzvCLL DlSNh/6dsiQADpIxDlgOb68JLxTqGD+8QNNHSY9RfY/3yzlzKsILLymq9pMGP9zeIZ8W+ XF9WkKogtGAsps/gUPbJn7aIV5+lFp3Tp0Yb52Zt5QX7R3ReU9soDoGDzUfZZf2Gbfg== 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=KFrUJckS; 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 1A61E606A31A; Wed, 28 Oct 2026 17:52:31 +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=KFrUJckS Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6BF251F01825; Wed, 28 Oct 2026 17:52:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793209951; bh=x/8BAwcQhuwK00+p0sxmABMVivl6VFS6qc4tNtIgIwk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KFrUJckSbpzEZvZ5R8aMgC5mRBMdmVx6+RI/F+Xsx5zyG7/Ar86cd/O/0N2V2eAHi 46dOfDxImzMYPCmb4gmta5izsiUw56EZ0tPo4KSARLqnXU1Tn9n+teO88z/6yOUtZH F/63j4TgEyXYJJpXcq/5GZkFmAtS3UXKjhu5XVqE= 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 6.6 024/168] nios2: fix __wsum type degradation in csum_fold() Date: Wed, 28 Oct 2026 17:59:20 +0100 Message-ID: <20261028165943.669544472@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028165943.089486480@linuxfoundation.org> References: <20261028165943.089486480@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 6.6-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