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 8A4481922C4; Wed, 5 Feb 2025 14:41:06 +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=1738766466; cv=none; b=JTlsrr6mlTgvI/Zsqlm4toVpIv81FksRcA+bCvIFmrvipfzid6yk/pjjgxlxDMuLe3G8zJ7hMIcp5aUhAX6uT8rvpeBYreTkgFtui8q1vc8S6w7HFPHhUjucVj26fIe1TswkYSCZiytS/W7burTmTL26DSVhpdW2LjOtueJsxGc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738766466; c=relaxed/simple; bh=+HEAaJF8Vfn0JysQdJusarpQaXO7hTReiidKIIHz9pk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UUNhvSBqkrHJfYs4/r5qfQkTevvBEmwWEyKqNeUveKsE+VKp5LGe0DGmB2RRZz3Cv48ViseJmXrXWxh9sEzkkfx1FoVNg5ROcSpO9vlAc+x3Xw2kpCZp0PkqbCHuwn1BwkvVjmgE0zId6CNQK6afFSzisbPcB6k8pBE9xhCJv9c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2KMrCQYl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2KMrCQYl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E79C7C4CED1; Wed, 5 Feb 2025 14:41:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1738766466; bh=+HEAaJF8Vfn0JysQdJusarpQaXO7hTReiidKIIHz9pk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2KMrCQYl8DlxkfvevgMoK3qJ/Gtf3vXiZter9WChzpsxbxmy3cB7r7sRvRuCowkxD +Y+ZxzuIVbUaxl+q8L13r5Kz+SAdAJ/3dzH1Lx4aW9nisTvQqSfZOJBgxp8cTRs7W2 kjZAz+oxCOL1ye+W9raw//h29Yr5U8l79U1q2Sc4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, kernel test robot , Willem de Bruijn , Christian Gmeiner , Brian Cain , Brian Cain , Sasha Levin Subject: [PATCH 6.6 365/393] hexagon: fix using plain integer as NULL pointer warning in cmpxchg Date: Wed, 5 Feb 2025 14:44:44 +0100 Message-ID: <20250205134434.264582788@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250205134420.279368572@linuxfoundation.org> References: <20250205134420.279368572@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Willem de Bruijn [ Upstream commit 8a20030038742b9915c6d811a4e6c14b126cafb4 ] Sparse reports net/ipv4/inet_diag.c:1511:17: sparse: sparse: Using plain integer as NULL pointer Due to this code calling cmpxchg on a non-integer type struct inet_diag_handler * return !cmpxchg((const struct inet_diag_handler**)&inet_diag_table[type], NULL, h) ? 0 : -EEXIST; While hexagon's cmpxchg assigns an integer value to a variable of this type. __typeof__(*(ptr)) __oldval = 0; Update this assignment to cast 0 to the correct type. The original issue is easily reproduced at head with the below block, and is absent after this change. make LLVM=1 ARCH=hexagon defconfig make C=1 LLVM=1 ARCH=hexagon net/ipv4/inet_diag.o Fixes: 99a70aa051d2 ("Hexagon: Add processor and system headers") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202411091538.PGSTqUBi-lkp@intel.com/ Signed-off-by: Willem de Bruijn Tested-by: Christian Gmeiner Link: https://lore.kernel.org/r/20241203221736.282020-1-willemdebruijn.kernel@gmail.com Signed-off-by: Brian Cain Signed-off-by: Brian Cain Signed-off-by: Sasha Levin --- arch/hexagon/include/asm/cmpxchg.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/hexagon/include/asm/cmpxchg.h b/arch/hexagon/include/asm/cmpxchg.h index bf6cf5579cf45..9c58fb81f7fd6 100644 --- a/arch/hexagon/include/asm/cmpxchg.h +++ b/arch/hexagon/include/asm/cmpxchg.h @@ -56,7 +56,7 @@ __arch_xchg(unsigned long x, volatile void *ptr, int size) __typeof__(ptr) __ptr = (ptr); \ __typeof__(*(ptr)) __old = (old); \ __typeof__(*(ptr)) __new = (new); \ - __typeof__(*(ptr)) __oldval = 0; \ + __typeof__(*(ptr)) __oldval = (__typeof__(*(ptr))) 0; \ \ asm volatile( \ "1: %0 = memw_locked(%1);\n" \ -- 2.39.5