From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CC2C4EBFD0F for ; Mon, 13 Apr 2026 08:01:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6ACC810E355; Mon, 13 Apr 2026 08:01:36 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="FR3KkcPT"; dkim-atps=neutral Received: from mail-wm1-f49.google.com (mail-wm1-f49.google.com [209.85.128.49]) by gabe.freedesktop.org (Postfix) with ESMTPS id 26D8E10E0D9 for ; Sun, 12 Apr 2026 17:22:03 +0000 (UTC) Received: by mail-wm1-f49.google.com with SMTP id 5b1f17b1804b1-4887fd35e60so25346795e9.2 for ; Sun, 12 Apr 2026 10:22:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776014522; x=1776619322; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=7F4lbNQWtZXtoROCb8OY9JzSy1iP1R3hy25K3QPEtAo=; b=FR3KkcPTffoBztS6Uhb8ovSjNtpN7csjWnZzh5pyABLZP6kqd6FNgDxidHGZttTmgu hONEzxv962IBPuRbqQHbQEJknTLxbP7/FhDyIN2bPD7cnAY9OLjdMFZrGRNIG4q3b2cY xH78wSUaHa3jxP9o0fenGeA2eE1OlOuQVjAcGZCwcnaEDKiL0tDPevDKcCF5OlhWJeqZ CR3PZHaUi72wfpo2YTDFOlqCxwGBx/8oUrfB91yJR2kQ3mEz1LF+SsGABuQ8sbhMfF2q +zomISncTo38hwweX4yvt6xJOqOnL8U7qosvlEk1hR/jm+ymW/aCAM9WmoEEwz4B1F1N 4OVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776014522; x=1776619322; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=7F4lbNQWtZXtoROCb8OY9JzSy1iP1R3hy25K3QPEtAo=; b=FSq1tSZNsWLssFOEYSPpq1s3JGmimO1pEUanIAjAOZeEMWuMFsw/vl4X3QIxqT5s6j YZvwjIPjFSW1buhGMOJ1eP23NKNWdWj5HjnpvuzHHbk/slfG1fdjkcTKLoHmfxuflXk6 p90HIO7B7sG69MNefGm0W3HPnwwFRj9EetROILTjRPdRDG2j/dNSiACec/6eOhATcOvv Cwp5a1XNiwJ8I/tFUWBN9s18AZY+TtA/rD3o8g+PkOLuSHRD3JJ/AMWm8gusfz2QCswZ kgriQwu+gd3JkHBhaOOoAzSO7qsIEKoJbdso2j/agZ/tUJvTK4hrIrHsRV9jiBsHytIs bP2A== X-Gm-Message-State: AOJu0Yw4vfx9Y24o5QvszGgRunUgNv6drdV+58ma8d5uPuMDw9hGMLT+ eRGPp0NizGpmyDrPOPlIzZVM8nmlH857vAmT6xhoKNdzEv5sCMsISAwz X-Gm-Gg: AeBDievcOzgjFxWOel0V0O5OZ7IDDzNn/i1hY0TJvSmENYCuKtv+hDkUxLVGePEIsZ2 Ygk63c6sRhaKPAneedhnjVxu0Ay6RGhKYnc0plvjc8NDgk5CIpuqyrWCFMui9iDsUrH8KINiMBY R7cVcWrF6XPGJ8U8gMd/+aEprHv/f3lQg2H1BHyDUtvVlcrOBg1SgSxoxa8Dk53d1bPxRCyB0Ec bWBUpUaFfwglBmtaH8GnvBGmCI/Mbpvb7ovBPPrAx0qsm7Sibs2RxSXB7ZOG2U1y4SbMJ2TQ0lC ZI19rJSzyKMesrokFyYB4w28Mjdm9ku8uHfuOI4N7RMBOkSX7w6KbxqN8GkRaFpRkhqNKuzbX91 aXT5xXr40wA0DGzH+I70w2yMDg9JC0m464nd3BcKopjCBvv2a7UYrl4eTXco4y03pcecxqXJsPH 6s8UPtzNCRV7jrj1BtV5Uoj1sDBTjbLiM= X-Received: by 2002:a05:600c:a109:b0:488:af7f:7751 with SMTP id 5b1f17b1804b1-488d6836508mr100895415e9.15.1776014521398; Sun, 12 Apr 2026 10:22:01 -0700 (PDT) Received: from localhost.localdomain ([2a09:bac5:58be:2682::3d6:8f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488d5380feesm287047045e9.9.2026.04.12.10.22.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Apr 2026 10:22:01 -0700 (PDT) From: Baker To: andy@kernel.org, gregkh@linuxfoundation.org Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Baker Subject: [PATCH] staging: fbtft: replace empty macro args with identity converter Date: Sun, 12 Apr 2026 12:21:47 -0500 Message-ID: <20260412172147.2817-2-mzndmzn@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260412172147.2817-1-mzndmzn@gmail.com> References: <20260412172147.2817-1-mzndmzn@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Mon, 13 Apr 2026 08:01:34 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The define_fbtft_write_reg macro calls 'modifier' as a function. Passing an empty token as modifier is undefined behavior in C for fixed-arity macros. Introduce fbtft_no_conv() as an identity function to replace the empty args in the no-conversion cases. Signed-off-by: Baker --- drivers/staging/fbtft/fbtft-bus.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/staging/fbtft/fbtft-bus.c b/drivers/staging/fbtft/fbtft-bus.c index 30e436ff19e4..8ce263f68ed2 100644 --- a/drivers/staging/fbtft/fbtft-bus.c +++ b/drivers/staging/fbtft/fbtft-bus.c @@ -11,6 +11,8 @@ * *****************************************************************************/ +#define fbtft_no_conv(x) (x) + #define define_fbtft_write_reg(func, buffer_type, data_type, modifier) \ void func(struct fbtft_par *par, int len, ...) \ { \ @@ -62,9 +64,9 @@ out: \ } \ EXPORT_SYMBOL(func); -define_fbtft_write_reg(fbtft_write_reg8_bus8, u8, u8, ) +define_fbtft_write_reg(fbtft_write_reg8_bus8, u8, u8) define_fbtft_write_reg(fbtft_write_reg16_bus8, __be16, u16, cpu_to_be16) -define_fbtft_write_reg(fbtft_write_reg16_bus16, u16, u16, ) +define_fbtft_write_reg(fbtft_write_reg16_bus16, u16, u16) void fbtft_write_reg8_bus9(struct fbtft_par *par, int len, ...) { -- 2.47.3