From nobody Thu Apr 2 17:16:03 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C6746402B8E; Fri, 27 Mar 2026 16:24:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628650; cv=none; b=XxuMztE977utoXO8SMVYGETfkzDkEsIb48HXUjV1xjbpcSkrmGDtyk3bV7cdR9X22IxqKKkBOCnIRmRcDsJr+aJ4vsOnOAPOx9goGD0hL7x7mqpiVQzo4542L+o8d+nzPvuwxoR7mYpRAhLfW2L9l768HpR1b9nNJ+83K7HhWIo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628650; c=relaxed/simple; bh=8E2PLd8Xi1KBtL2Kxec5V5ZmUSQnGJ77ky0/+RmRlqo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=l3R4vTjeayZdS5bDsmBRQho45Ngok61Qk4/V/5TgD9NDd/ST8WijRb3JFPYqofCEVUfyrK0EsqxHtzioStMp5r3dzqdPrZqS1Yf1l5xy40zQZZWSBqIdHAcMRU+xHOD8WgrfnJY/FFtwTbfNFzH/gaG+UyN8vQPnbq+xLAV2jbo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=PmDk0dLx; arc=none smtp.client-ip=198.175.65.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="PmDk0dLx" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774628649; x=1806164649; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8E2PLd8Xi1KBtL2Kxec5V5ZmUSQnGJ77ky0/+RmRlqo=; b=PmDk0dLxtx3OtJzIU9LzR+iZlfFFogJAJ3rZcV6OU4HToL8AVxJDS9Ye F4ONWE+oYKE0r2UMvIzBUo4Owkoj+fN0BLI8WHhI3F4vk9+yJSss6Nbuz WJ4vYs1/5MaZpQm/rQaWnzmSVUZ3cyf/jRQTrkYKpFCOs4LXoizIXjaGT 4Ii9d/mKhO/NO8DlUfyBIwtQAyepIh/he+qBu7oF0izGzKP+DfzDM6SQJ asgCb3vv9uLnKg8f3qCBYKbo3WPvEBZvOL0DKE1KwvfE16yMZnUVOhxfU jHJ4Fqtw+plxtL7EDarJUQxNLgN6IWUlYA0niuDwXEMKEqZpkCtb6tQTA Q==; X-CSE-ConnectionGUID: cGuIfJfzSsKoq0zlWdSO1Q== X-CSE-MsgGUID: y2EJi8zETKaJUyYhyXlK/w== X-IronPort-AV: E=McAfee;i="6800,10657,11741"; a="79565672" X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="79565672" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 09:24:09 -0700 X-CSE-ConnectionGUID: INInqSmmT5GX8l6IsBXsZw== X-CSE-MsgGUID: MDEUJzpURl2LxhyA9Xh66w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="220516363" Received: from yilunxu-optiplex-7050.sh.intel.com ([10.239.159.165]) by fmviesa006.fm.intel.com with ESMTP; 27 Mar 2026 09:24:06 -0700 From: Xu Yilun To: linux-coco@lists.linux.dev, linux-pci@vger.kernel.org, dan.j.williams@intel.com, x86@kernel.org Cc: chao.gao@intel.com, dave.jiang@intel.com, baolu.lu@linux.intel.com, yilun.xu@linux.intel.com, yilun.xu@intel.com, zhenzhong.duan@intel.com, kvm@vger.kernel.org, rick.p.edgecombe@intel.com, dave.hansen@linux.intel.com, kas@kernel.org, xiaoyao.li@intel.com, vishal.l.verma@intel.com, linux-kernel@vger.kernel.org Subject: [PATCH v2 26/31] mm: Add __free() support for __free_page() Date: Sat, 28 Mar 2026 00:01:27 +0800 Message-Id: <20260327160132.2946114-27-yilun.xu@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260327160132.2946114-1-yilun.xu@linux.intel.com> References: <20260327160132.2946114-1-yilun.xu@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Allow for the declaration of struct page * variables that trigger __free_page() when they go out of scope. A example usage would be in the following patch: static struct pci_tsm *tdx_tsm_link_pf0_probe(...) { ... struct page *in_msg_page __free(__free_page) =3D alloc_page(GFP_KERNEL | __GFP_ZERO); if (!in_msg_page) return NULL; struct page *out_msg_page __free(__free_page) =3D alloc_page(GFP_KERNEL | __GFP_ZERO); if (!out_msg_page) return NULL; ... tlink->in_msg =3D no_free_ptr(in_msg_page); tlink->out_msg =3D no_free_ptr(out_msg_page); ... } Signed-off-by: Xu Yilun Reviewed-by: Jonathan Cameron --- include/linux/gfp.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 51ef13ed756e..d37e5564234e 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -391,6 +391,7 @@ extern void free_pages_nolock(struct page *page, unsign= ed int order); extern void free_pages(unsigned long addr, unsigned int order); =20 #define __free_page(page) __free_pages((page), 0) +DEFINE_FREE(__free_page, struct page *, if (_T) __free_page(_T)) #define free_page(addr) free_pages((addr), 0) =20 void page_alloc_init_cpuhp(void); --=20 2.25.1