From patchwork Tue Mar 4 09:21:04 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Elver X-Patchwork-Id: 14000257 Received: from mail-ed1-f73.google.com (mail-ed1-f73.google.com [209.85.208.73]) (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 0B8131FECD8 for ; Tue, 4 Mar 2025 09:25:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741080326; cv=none; b=b6JxLledo+G8DM0Nbm+lp/sC4OTjvzAGAmsjoaYE4Ql5un3CcltKLQz4H/mexUa/bg7dI1qgDPFAmmjqYyhfzzHL/OwM3xExZvUL4T3U7Fzo/iKM2wtJmXpQ0O1RJmGvdeEbdJ8Mj9ecQ9TtuIPr4XQHixSJ8wK4pP1V6kP+xXw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741080326; c=relaxed/simple; bh=StYpncqzFSXHEYm8ZOW/8xsOKbkMA3l0kvQy8Snle/I=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=FSxRitt9bk8kINMaUaJRCJujOM7zxVacjhA9zYchvQDa+idkg1593Id+0toTrigfgth5TLfgy5DiGdl8dciLpcMVIXG6lsOHl8o3Dj8qKeJhI/TbwhUDOEZ/VLcE7YJ+fqsRNukSpGuSqiQurCX6GyQqIAUVDm3aCaLM9beUIQM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--elver.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=scVZ+iz5; arc=none smtp.client-ip=209.85.208.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--elver.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="scVZ+iz5" Received: by mail-ed1-f73.google.com with SMTP id 4fb4d7f45d1cf-5e4becb4582so7133077a12.3 for ; Tue, 04 Mar 2025 01:25:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1741080322; x=1741685122; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Pp+E8sKoonvgdGAMVoQXSiL/gMXgRdJZHQEkz4wDB8k=; b=scVZ+iz51d3NKfYcrDAT7foKOBgwosQbwsV6wvyQNI64abLBrDh3kInDKqEL2XZ2yI i/QZrCOLpx273bv8NHyFfMkQaEWrn+gVldrsOScezd369MRxCkFon/5fDKG3/J6LLe2Y /Rt2C3SRfGIkS4ckhqBpP2oarSPq8DXVGzU83CN+VTEPdX6PELSIYgXMFiA5JrRwOvRw qJcNkstNO1s+24/ilf3YPA860LBYfj+jGrKgER2EpZJ30Mu3wnVVCtrUgCVx+9zW6f58 bbuk0W9+4Yn8rXXv+O7ED6LSWG+ZGH4EFSkSprX9pQazlOX1H+ktLbCGNglRfh7f3OmK q0Zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741080322; x=1741685122; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Pp+E8sKoonvgdGAMVoQXSiL/gMXgRdJZHQEkz4wDB8k=; b=q3juYUTE8+uosBVBoCmO+k/wzk9AQY4/fT2s9HHT1jqVBWgA3D7dOCzbXvFrua2QXL 7JsB7hkIUut0cRPtAK/mwySxHCvODrj6r01VycRh9ZpaPIhMLR7BrFuAhqGh6kV78tRO BZ0eC3p+o8SKBdDpdBeBFSp+vCzj385xcsvY4ZSQERfD7b82MYWCjtyZDXZRRTx8rUI4 oKAaQ8w0SBPM+hAsXnocj2q5nuNglERkDz8Oi+7p6x87mYxUhkgNy8zInAk15D3uP6Y/ GtvpaRbVZ1rXSXhxpIN0QU7dpp42O+nM0cQ5ta9uV6Y2wMsbQlw2reFRoOnR8P2UcuZr en4Q== X-Forwarded-Encrypted: i=1; AJvYcCUfzYWImOSqyHnwTenTeddthzk9QNfW3XEtc8++tDazexshk/oqE9vrotnW8REf8xg8pM8=@vger.kernel.org X-Gm-Message-State: AOJu0YxTZMuEVs4LAFIolal9pSpl6aQaKQsiMpeQuYC4dqdLK0fAmTK+ RLCXiqrNc48CnvhtnwzWMMyaTFQPWKuP3emaCgEmaLTkq27SdyokRi8gTNQShA9pbd7/DtFAGA= = X-Google-Smtp-Source: AGHT+IH9KyF8MJ1v+l119Ih9d9zKK6oLF4W3jM8vNIisJnYl0p8zp9JkukwRd5xgRYNmt/zF9O2bCVvi1Q== X-Received: from edpr11.prod.google.com ([2002:aa7:c14b:0:b0:5dc:578d:62e9]) (user=elver job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6402:3487:b0:5de:3478:269b with SMTP id 4fb4d7f45d1cf-5e4d6b75ef2mr15880706a12.32.1741080322290; Tue, 04 Mar 2025 01:25:22 -0800 (PST) Date: Tue, 4 Mar 2025 10:21:04 +0100 In-Reply-To: <20250304092417.2873893-1-elver@google.com> Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250304092417.2873893-1-elver@google.com> X-Mailer: git-send-email 2.48.1.711.g2feabab25a-goog Message-ID: <20250304092417.2873893-6-elver@google.com> Subject: [PATCH v2 05/34] checkpatch: Warn about capability_unsafe() without comment From: Marco Elver To: elver@google.com Cc: "David S. Miller" , Luc Van Oostenryck , "Paul E. McKenney" , Alexander Potapenko , Arnd Bergmann , Bart Van Assche , Bill Wendling , Boqun Feng , Dmitry Vyukov , Eric Dumazet , Frederic Weisbecker , Greg Kroah-Hartman , Herbert Xu , Ingo Molnar , Jann Horn , Jiri Slaby , Joel Fernandes , Jonathan Corbet , Josh Triplett , Justin Stitt , Kees Cook , Kentaro Takeda , Mark Rutland , Mathieu Desnoyers , Miguel Ojeda , Nathan Chancellor , Neeraj Upadhyay , Peter Zijlstra , Steven Rostedt , Tetsuo Handa , Thomas Gleixner , Uladzislau Rezki , Waiman Long , Will Deacon , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, rcu@vger.kernel.org, linux-crypto@vger.kernel.org, linux-serial@vger.kernel.org Warn about applications of capability_unsafe() without a comment, to encourage documenting the reasoning behind why it was deemed safe. Signed-off-by: Marco Elver --- scripts/checkpatch.pl | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 7b28ad331742..c28efdb1d404 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -6693,6 +6693,14 @@ sub process { } } +# check for capability_unsafe without a comment. + if ($line =~ /\bcapability_unsafe\b/) { + if (!ctx_has_comment($first_line, $linenr)) { + WARN("CAPABILITY_UNSAFE", + "capability_unsafe without comment\n" . $herecurr); + } + } + # check of hardware specific defines if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) { CHK("ARCH_DEFINES",