From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f50.google.com (mail-wm1-f50.google.com [209.85.128.50]) (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 1629E1E1A3B for ; Mon, 21 Oct 2024 08:09:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729498147; cv=none; b=HoBAGXCeDcSfYKd+STT0TzO2nvBZKEsP20cwdLkyPd+JjsGuRfMWqfndA2Ixows7FjhHW3ATttAqRrU0VMneIcR5zEZBkkjijuzI5k4IqmArFvY9hFRm0XzxSkfFiQ0Mw+DWINf7G4KFNA9P9fbNAdnBbhvtekrnbTCC1NV0RSg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729498147; c=relaxed/simple; bh=utP1TBVPTQii8sqmMIxLHJpFjq0gZZuv3z0x3E0vmyw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Z6FgNW4rVqH/8ZtHW2istukqnvp7Sd5OGCRC5kIVOmsDiNjcRK+RqgK9pGKwbfJ1RqAORCooswT90K0gPYYf6oobmHptgKvyCRJAyVhxj1nz4IY8T6slHcwfv3+i90lkWZR94Ft+30SPSKAMkz6wJ4XUDUjKcnvty3TBr25sVKU= 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=kDAgRR9P; arc=none smtp.client-ip=209.85.128.50 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="kDAgRR9P" Received: by mail-wm1-f50.google.com with SMTP id 5b1f17b1804b1-4315eeb2601so46826405e9.2 for ; Mon, 21 Oct 2024 01:09:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729498143; x=1730102943; 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=dGYDCgTegQahGt6W0OyeaxxuCRjXY1E2wgBMnm57zms=; b=kDAgRR9Pb4iBPt67hQPM07qnTR5hekan6LZ4RrsxUtNe06uIY1B3eJunOIhR23GAa2 RgbadrhWF0DhkSoOCWLBJTdcIO4y8DQTYM2dbDypoEKqJQfEY/YNZOwIeWsGCx8xAGsH VLrz0J/80u++MkRNDJjwYjW2qwf93YBbcuqwSA8I9QGwk5lH45FbJ+Vj5axKJBl5sQT8 yljrkHxoNxbc9WK0e0ira0neTAS1MK5nPEumNtvOeqTYZqpYBq4ZxgQq5aJ5dZaYNFIk IKys/2lW/kQcFErxKBVQqRAhjb+MCnWXiyAmK9DKyMx/wHiDsPLYzac/MOuxXPdX0mU3 e/bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729498143; x=1730102943; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=dGYDCgTegQahGt6W0OyeaxxuCRjXY1E2wgBMnm57zms=; b=LZRpHqOvJk47h5xho9xLP7BGEkYR1H6y+AK/4sGNXTQ1257DEjXy20fPowX4eZMTty eZhORjqdCe5foikwn9bjI4rRbvdlhX4HGY4yCHEPxJi1+Iw8uIkro7hcLrUxZ1LAKLUR FX7KOJeE+CvbtEj9pHzzFquvBAnw16tnGROFcR6TIilht08G/e3OhXHD2PrB//C4kJ2X Qs1l38xxyTwGKXQiviOlmXGxTRMk5spHMOzT7g4h1VnbwT6SCs1f6RsoJGeFeNgk1Ssk qKonh39r8t+2GT7F2FoCecKg+480gbmjV8n7Ub1BRIM4N2zSO9axCNbh98NxgQR78Kxl +gZA== X-Forwarded-Encrypted: i=1; AJvYcCWrhBtjFEyT9n/TXXZs8CfBBjSTtQtRFY9QwzNZWvI9NoCs3sI10Q6Fe47N1by43FvovKN0Qc1MEk4ptYo=@vger.kernel.org X-Gm-Message-State: AOJu0YwCloNJ7/ekzpTi6W7mDFepY/EiznhgNGWalZON20/3vkOGjqBe EIJEVJkMm0b7iY7WQUUHpejbCxKNp9anSmQksYb8wHUaceudRZ6J X-Google-Smtp-Source: AGHT+IHFQByHjFNMRT59cjPcxA3RcXY5ZiMSkbh1QNihsbwHAb2N9O3yUVyeBVPBGs/Ass4ZkQ+uMA== X-Received: by 2002:adf:f9cb:0:b0:37c:d1ea:f1ce with SMTP id ffacd0b85a97d-37eab2e303amr11142282f8f.25.1729498143150; Mon, 21 Oct 2024 01:09:03 -0700 (PDT) Received: from fedora.iskraemeco.si ([193.77.86.230]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9a913706a7sm175925366b.141.2024.10.21.01.09.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Oct 2024 01:09:01 -0700 (PDT) From: Uros Bizjak To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Uros Bizjak , Dennis Zhou , Tejun Heo , Christoph Lameter , Andrew Morton Subject: [PATCH 3/3] percpu: Cast percpu pointer in PERCPU_PTR() via unsigned long Date: Mon, 21 Oct 2024 10:07:38 +0200 Message-ID: <20241021080856.48746-3-ubizjak@gmail.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241021080856.48746-1-ubizjak@gmail.com> References: <20241021080856.48746-1-ubizjak@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 Cast pointer from percpu address space to generic (kernel) address space in PERCPU_PTR() macro via unsigned long intermediate cast [1]. This intermediate cast is also required to avoid build failure when GCC's strict named address space checks for x86 targets [2] are enabled. Found by GCC's named address space checks. [1] https://sparse.docs.kernel.org/en/latest/annotations.html#address-space-name [2] https://gcc.gnu.org/onlinedocs/gcc/Named-Address-Spaces.html#x86-Named-Address-Spaces Signed-off-by: Uros Bizjak Cc: Dennis Zhou Cc: Tejun Heo Cc: Christoph Lameter Cc: Andrew Morton --- include/linux/percpu-defs.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h index e1cf7982424f..35842d1e3879 100644 --- a/include/linux/percpu-defs.h +++ b/include/linux/percpu-defs.h @@ -221,7 +221,10 @@ do { \ } while (0) #define PERCPU_PTR(__p) \ - (typeof(*(__p)) __force __kernel *)(__p); +({ \ + unsigned long __pcpu_ptr = (__force unsigned long)(__p); \ + (typeof(*(__p)) __force __kernel *)(__pcpu_ptr); \ +}) #ifdef CONFIG_SMP -- 2.47.0