From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EE62F383C8B for ; Sat, 28 Feb 2026 18:08:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302119; cv=none; b=I6pzozSU+rJ76IvGvon3fbDf4Px3f43rd3nwZGoIe54dZ65zzaARI+oOpWyQj6lAt9ZN3OMXdrQnvNHvvUrw2kFZP9JNjWXw81doFKKDEL9heyc+FQpX13r38uHcgItvEoLiZ8oFAny9eA/ETpMPkUoS0OMFnblo+j6BmVZpRAs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302119; c=relaxed/simple; bh=EO7jsIkjy8zcpTckBUW3cT/KYocmnqn8xEzGqyuAgvQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=kjT1bez38W95yKVYclafLfMBbh8XWgNNWh1AC6SIxVH31HfGXRHHVtlwx4yqfqgKQwpL6OUCmQ6jN0jkzjdQtNrbKTiNOR3bYYDb3QaVsz7LcXt+wGAZ0STnYM/FDerw+fzGkUjKK9dSMVJz3oQFbxQ67wgosUdaXjaVHXi0kgY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=igEuzZYs; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="igEuzZYs" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-82735a41985so1812907b3a.2 for ; Sat, 28 Feb 2026 10:08:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772302117; x=1772906917; darn=vger.kernel.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=1b/B2f0Vk0y2rjHQ9oplWOwEPv2E78m9d0l1U5eNgvc=; b=igEuzZYs0FLulukX5TLCjH0ZFbTEc0NPSxnQ653Bq4me+wQxy/P/2utSkQNO4k4bfn XHDE185wIdFwTIyaJjd4xRBv5v8c6jutrodQAex8+pwtsq+L8qhj+EQSMUKlNrpED0Zm JUbYEOOJp410I2e1byDReMYeRr6mdV2wsKEl3bLh0AMKYVt1Hm0dX4/9Mgf76roBKZyj zP3RSa/raDoTv2lyfhHmR0j38wl2k6EvCcBL5xFOSyIm0OKXRdzNrPWTxb19RUNyyMz1 cz+vyFdhuX59a63ALhsaN2IYwLIa96zB2f2f0XLWqGliICVl/i4/hgksVqokID/aRiM6 /7JA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772302117; x=1772906917; 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=1b/B2f0Vk0y2rjHQ9oplWOwEPv2E78m9d0l1U5eNgvc=; b=HLExTp+Zj0Xv1wNmJIrYkYISHzT035JjVTK9LQUYlyE9aOR7vZWTlfELASrZcEqZCf Bz0zWLLY7eEQe0xge7NudVWqEB4JRlKA+P4k04DrpQE6Sdt8DhhRdHfIWtGFajPgBIum 0HJeUCys0fodDS3YaRiBTjSGJVlWa9llB59XnBIRBjY+wVNZWcycHUQB58I2xgju7Fcp 3vvWEg68FHH1kx/4CG8XMnvA+/Yx33DTQx0RnLYSdWZSEZJGMcH/dLhI9mVieUSPQzK2 tTdZQIz0kZE0FJ2A6pqUqASPoXbDtLp9Em07PH3Q8IB06YOVzswbjP8WIIl5YXdTEruC pqXQ== X-Forwarded-Encrypted: i=1; AJvYcCU9XNfsI9RkeSgyBSwCFYrKcu5j0o4mRtRd0XksiXmN3g85uJZ1rXghQcy08C9EunuX6D318rrs6NaAX7k=@vger.kernel.org X-Gm-Message-State: AOJu0Yzu72lo/lYg/ROrH9tFLKFf5xxiroSfzKBr/z6EhZSOizifTm51 GhVNeIWOb7vrZ6EJ3NnUHlK7ihUQF0+AGxB9r4N9qO77ZhINQWbUdmNv X-Gm-Gg: ATEYQzzJpbYC73RznwtrVW/5k3r/Adkf+DqFaBTplJP/yHHJBV/a6NMmlD6WIPhj1U3 AjegACfwYdibeKRm4ANOG+hSLEnNJzGN57SD0rp12TjOJ8tlIV7seg522zdCFinUVNOFetzoHpI 9RPssxRIM9One/dqaZ089FuCFNrpf9lV7tjL44HhaGD6MK0CJlP2NGfldik2jatw3OFkmDDYYHy 3R+jFX66LKz9aJGym5EUT+oSo7Iyh6TO7IITw2R0lHmt0Q13XbmMVviTjyQrtI2ryFO0wGndBzI APHhz5LgxB7wXQcyLLNGkg3b1lvKMeV0vZK+X++auBIGYS4yBgfYrlfeTYzKkhBDh/byM/ENRkX pgsLaq10j0NMP+sHRAlXKdeEIb1ffblF8mo1Su5GD2C8c/QZuscx2l9vO+Q/cjyKxftCLjtJTM7 piOTicQYWl2tZ8WZwMVd74SqjPynArxHit8y4EHsQDFZs5Z8+59LwZcR52T3i492hz58RS X-Received: by 2002:a05:6a00:1a0b:b0:81d:a1b1:731b with SMTP id d2e1a72fcca58-8274d998763mr4706209b3a.19.1772302117279; Sat, 28 Feb 2026 10:08:37 -0800 (PST) Received: from sean-All-Series.. (1-160-203-78.dynamic-ip.hinet.net. [1.160.203.78]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82739ff1ca9sm8065154b3a.36.2026.02.28.10.08.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Feb 2026 10:08:37 -0800 (PST) From: Sean Chang To: Andrew Lunn , Chuck Lever , David Laight , nicolas.ferre@microchip.com, claudiu.beznea@tuxon.dev, trond.myklebust@hammerspace.com, anna@kernel.org Cc: netdev@vger.kernel.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, Sean Chang Subject: [PATCH v5 1/2] sunrpc: simplify dfprintk macros and fix nfsd build error Date: Sun, 1 Mar 2026 02:08:20 +0800 Message-Id: <20260228180821.811683-2-seanwascoding@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260228180821.811683-1-seanwascoding@gmail.com> References: <20260228180821.811683-1-seanwascoding@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When CONFIG_SUNRPC_DEBUG is disabled, the dfprintk() macros currently expand to empty do-while loops. This causes variables used solely within these calls to appear unused, triggering -Wunused-variable warnings. Following David Laight's suggestion, simplify the macro definitions by removing the unnecessary 'fmt' argument and using no_printk(__VA_ARGS__) directly. This ensures the compiler performs type checking and "sees" the variables, silencing the warnings without emitting any code. Additionally, fix a build error in fs/nfsd/nfsfh.c reported by syzbot. In nfsd_setuser_and_check_port(), the variable 'buf' is conditionally defined via RPC_IFDEBUG. Since no_printk() now performs type checking, it triggers an 'undeclared identifier' error when debug is disabled. Wrap the dprintk call in an #if block to synchronize its lifecycle with 'buf', following the pattern in svc_rdma_transport.c. Link: https://lore.kernel.org/all/69a2e269.050a0220.3a55be.003e.GAE@google.com/ Suggested-by: Andrew Lunn Suggested-by: David Laight Signed-off-by: Sean Chang --- fs/nfsd/nfsfh.c | 2 ++ include/linux/sunrpc/debug.h | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index ed85dd43da18..f7386fd483a6 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -106,8 +106,10 @@ static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp, /* Check if the request originated from a secure port. */ if (rqstp && !nfsd_originating_port_ok(rqstp, cred, exp)) { RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) dprintk("nfsd: request from insecure port %s!\n", svc_print_addr(rqstp, buf, sizeof(buf))); +#endif return nfserr_perm; } diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h index eb4bd62df319..cb33c7e1f370 100644 --- a/include/linux/sunrpc/debug.h +++ b/include/linux/sunrpc/debug.h @@ -52,8 +52,8 @@ do { \ # define RPC_IFDEBUG(x) x #else # define ifdebug(fac) if (0) -# define dfprintk(fac, fmt, ...) do {} while (0) -# define dfprintk_rcu(fac, fmt, ...) do {} while (0) +# define dfprintk(fac, ...) no_printk(__VA_ARGS__) +# define dfprintk_rcu(fac, ...) no_printk(__VA_ARGS__) # define RPC_IFDEBUG(x) #endif -- 2.34.1