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=1793207634; b=Dfe7W8YJx0X7v2dyR/EMXOyEN1tnh4wr69giQNyF6fgl/nmSvrkrWLGErqNUHcC6ZjAl xutxc/mbYEfV+lQWsnok6gq0jHHmFITuyMcsyZz2ISArV0liavYQ+FHniwVRxxI6NA0C4 IykxAigq+yNMkUKQfY04S0cHqf3z8uZrqbWAli/40jkyd4/lTbEMkTox8sKQHJoG8u0un HbWVWHY9E/aWtABwHmF6rFimWH4RbPiWBDsU3dJb9uFdV7SIpelzu85u4iw2P+F1w9uwy FrqcPQqbkpGY6AP60Oo4YKhWiwO4r8y12VUFr3Zxi1iQ1J2BxLD4462xrnzJqQyw0JA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793207634; 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=cT4slk6TKq0C+kJiuwj4XGeKsmcdL0u4xEp0tB2mtu4=; b=i3mB/mrpK8QJAxl9d2jqSuJywCEUq/a7jnm2eRQBlDsCScrwYGoBvqHV5uxa9Xo99aAc bpIH4WiuIMmm08a+2dwGGe+ZStAlmbbjBgONT8imxUpFmKXoGnXe74WQ358Vfe/L9YNB9 7nlEVouaI/KIibjsR0x8JfFwWf49WqIUYcf+RqwyjE9nZ107mw0NXayD6gK3ft/An04ID RSE0bp7yRk47m5DWw/p7SbG5U00ZP1vXHmrL8RBYZTMuMTEUpdDzn5jxDU1YJMmU2ImTU 0uLrXgiuG36wPEYvcemVO67LrmWZDZtZlCRxkk2sG3KymtngXPv+YngTn7ULooPcNWQ== 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=cPKzLzTG; 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 B8988606A323; Wed, 28 Oct 2026 17:13:53 +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=cPKzLzTG Received: by smtp.kernel.org (Postfix) with ESMTPSA id DDB531F031E1; Wed, 28 Oct 2026 17:13:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793207633; bh=cT4slk6TKq0C+kJiuwj4XGeKsmcdL0u4xEp0tB2mtu4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=cPKzLzTGY9BNNdDkhFAj/j5Ue3fN1Q+GHDrVTUiGuaKOEFTmVLUeEQ9/Dx2qDQV/A lzI1qOm6QBfqikjRtmincgEmIrho4i2+Msp/w/Kemc+IZxY5ZNtdfh1YI5W1SGS4Qd KzNRmutS2j+91AlyHPN8xojC9e5TrDOSRzSszNTk= 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 6.12 042/247] nios2: fix __wsum type degradation in csum_fold() Date: Wed, 28 Oct 2026 17:57:25 +0100 Message-ID: <20261028165948.367407119@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028165947.349197979@linuxfoundation.org> References: <20261028165947.349197979@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 6.12-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