From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=54.69.30.187 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794111612; b=Rewavxl7sR95f1QAEh06hcjeXx3m0KDoTGFNGvTlMT3kMccgRPDxHUd4d55WgE/jvlvL 6UNKWrAJLfCwMN63xyWOVpm48cst+8EPmieErIf9f/R3V2C4v2HBHSXsTqum4PUniAuCf fkD7hbbKk4cY3yIpF2DHbDLQEIhpy2AG6ESI8rlgBhYqRGAQAizfd7hQ7EhO/zJxClsID dDhBrz/MMXo3yXRglKnCvuGtCT06pUsVSEEBWI2/vGeeK85kzeDUPZJmhCPUTbpd9ONoc aY3HPMk4x0yD15aFcEqc2ByHh1RMhBdkXrfg4dLzISZWPa5UJIdcip0DDOjGrCcwQPw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794111612; h=DMARC-Filter:From:DKIM-Signature:To:Cc:Subject:Date:Message-ID: MIME-Version:Content-Transfer-Encoding; bh=P5wjwTweeB4uSgju3y4R3MfnL8tG0LbUuhk6pEANCaA=; b=20KpN0lJtaHpc8WSoRNt/es0AsEcmkeVN2Yg1kjy/m/jrZ8CQaf32laCs+aFH9wjhxqL C+O8r2q9Iyn2j4lDEeuV+j/mSBYyRrkKxfg/6U/wAmPJPMD2Qc4296zwiQ/mxxnDNS8Ik DPKKHOJCjGGT31Ogt+Fql7hoVuZYYx7L2q5Y3e5ybl8J3JYTXi+Up31+IYusSTLLzGFRv StvUwBJb5UhIhkDJTVUQFCzmb+tJvVzJMqlYzYQ23KW+vh7ssoSOkhO25Z2xliQ2zTPOQ 5RBCpA/cbhJW88FIqbbGLrnBiAsWk8WRQ+M2w6McLa6SbO9H6SChCMPDKiveoUvRsxQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=freenixos.com; spf=pass smtp.mailfrom=freenixos.com; dkim=pass header.d=freenixos.com header.i=@freenixos.com header.a=rsa-sha256 header.s=mail header.b=KjSTir3i; arc=none smtp.remote-ip=54.69.30.187 Received: from mail.freenixos.com (mail.freenixos.com [54.69.30.187]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A2759606A31A; Sun, 8 Nov 2026 04:20:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org A2759606A31A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=freenixos.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=freenixos.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=freenixos.com header.i=@freenixos.com header.a=rsa-sha256 header.s=mail header.b=KjSTir3i From: Hex Lindqvist DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freenixos.com; s=mail; t=1794111610; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=P5wjwTweeB4uSgju3y4R3MfnL8tG0LbUuhk6pEANCaA=; b=KjSTir3ii2wmBI/AsBKxFmmAWNjdD4h3As+LluTyaugqCP63wEEmF6tpQwdq1G6k+8voB8 1AVSjP+YfpRKsrveNuwraDx0Cy5eodGKGXH5pCAEA/r3TS2XuKuy8PiJAvojOO3XjC3xwa +3mwenhbQF4BKrhQd2KfEwoyeG9V5dyPCFK/LtqVb+QL17t+t9HU/6NVGqec+45LPC1hJT tbJ5fncGfDJWK/oAA8R3b5/k1rXeel+62k9SuDGNXhxr2oFG1AUOhqsM2RgdmzLLOUsXmo iaXZle6HpnPQXBb++KdjoTeHXU63B/TlLK/opGSllxGnseljIM8Huz76pPwuBg== To: Marcel Holtmann , Luiz Augusto von Dentz Cc: Zijun Hu , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] Bluetooth: btusb: Use DECLARE_FLEX_ARRAY() for memdump segment data Date: Sat, 7 Nov 2026 20:20:08 -0800 Message-ID: <20261108042008.226295-1-hex@freenixos.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit struct qhci_vse_memdump declares segdata as a zero-length array in a union. Zero-length arrays are deprecated [1], so use DECLARE_FLEX_ARRAY() instead. No functional change: segdata is only used with offsetof(). With debug info stripped, btusb.o is byte-for-byte identical before and after, built with GCC 16 and Clang 21 on x86_64 and GCC 16 on arm64, with UBSAN_BOUNDS and FORTIFY_SOURCE enabled. An AI assistant helped find and check this change and drafted this message. Link: https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays [1] Signed-off-by: Hex Lindqvist --- drivers/bluetooth/btusb_qcom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bluetooth/btusb_qcom.c b/drivers/bluetooth/btusb_qcom.c index cc4cfcde2afa..97be9078e045 100644 --- a/drivers/bluetooth/btusb_qcom.c +++ b/drivers/bluetooth/btusb_qcom.c @@ -533,7 +533,7 @@ struct qhci_vse_memdump { __le16 seqno; u8 subsys; union { - u8 segdata[0]; + DECLARE_FLEX_ARRAY(u8, segdata); struct { __le32 dump_size; u8 first_segdata[]; base-commit: ebdfe8561b5496b7eafedccd13a000a7261bc52b -- 2.56.0