From patchwork Tue Mar 25 12:16:07 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 14029077 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 56726C36005 for ; Tue, 25 Mar 2025 13:53:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=P6w/CgGOPWwJmjVxM3Ud0BM7zAshxUpx2YeHpdME5LY=; b=fCskIB6MIW76r+ X6an0xC/74IoC2RKrUT8WrTTLBpDi/YOylezaYYClwjoH07nHZAn2jOg6jU+psEcuQZB52Dvt/ao9 VU4PoSFE1qKK+/Qdn8kh9EWv4zrZkGH8ChJvQbMgGjWVFE7iOsCbzyZdMVq24SxGDr2wiIK6Y9i+Y FSS4Se2qvcgO4NP3nNzr8cNkTEQbq1Tcmjbcl5l9kc+O61q6gMGKbS+4KAz4Rs8S9VHZw0RwE2Th2 N/CqDLfCDNH/T5VekHkfPOxV6D3kMKVs1Zr6kXbRqPrjRmip9VeUJ/+osrkVUqaqHTXp9ebyC2wUr F2dspwbbf0eww8gzldcg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.1 #2 (Red Hat Linux)) id 1tx4iz-000000066Tm-3eQ6; Tue, 25 Mar 2025 13:53:49 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.1 #2 (Red Hat Linux)) id 1tx3J6-00000005nfP-44Xg; Tue, 25 Mar 2025 12:23:02 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 536EA4368C; Tue, 25 Mar 2025 12:23:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E4CEC4CEE4; Tue, 25 Mar 2025 12:22:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742905380; bh=kGPsHFFMg2CAbXtRnGFCoMZoeXyVXOmvw2ykjsD95WE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ntclLWycxIrsN91q9/Iq7DZLV3nwTWOf4Qo5f6R8yJlXo1s0ypvyO9gc8nw1n9iJa FXE4HvXg9jbtr74bzaGhsm46h50G8b9MlQPjOkwWiuLMEejz6lYx8r2CpJVGHd+i84 Y9n4c1aA4xtTudNn6+y4oe79jba9Mxkk0kZFXd/7xCyMom+qmIyy4T/0ysXPzI7bay 5sdbYuoQbrTw4El0JuMiLQwd1ke34f9kjkg3HXYA3l/Iwam2xe4E80RyKMurhKZ1jo s5Lzild3//u1NkkMe5ZEFU8hjrRZDyJHVc5UpBWJ9x1eZ2XWDKu2b3FH9QfncuRVF3 1ztYGTU3Jqe1Q== From: guoren@kernel.org To: arnd@arndb.de, gregkh@linuxfoundation.org, torvalds@linux-foundation.org, paul.walmsley@sifive.com, palmer@dabbelt.com, anup@brainfault.org, atishp@atishpatra.org, oleg@redhat.com, kees@kernel.org, tglx@linutronix.de, will@kernel.org, mark.rutland@arm.com, brauner@kernel.org, akpm@linux-foundation.org, rostedt@goodmis.org, edumazet@google.com, unicorn_wang@outlook.com, inochiama@outlook.com, gaohan@iscas.ac.cn, shihua@iscas.ac.cn, jiawei@iscas.ac.cn, wuwei2016@iscas.ac.cn, drew@pdp7.com, prabhakar.mahadev-lad.rj@bp.renesas.com, ctsai390@andestech.com, wefu@redhat.com, kuba@kernel.org, pabeni@redhat.com, josef@toxicpanda.com, dsterba@suse.com, mingo@redhat.com, peterz@infradead.org, boqun.feng@gmail.com, guoren@kernel.org, xiao.w.wang@intel.com, qingfang.deng@siflower.com.cn, leobras@redhat.com, jszhang@kernel.org, conor.dooley@microchip.com, samuel.holland@sifive.com, yongxuan.wang@sifive.com, luxu.kernel@bytedance.com, david@redhat.com, ruanjinjie@huawei.com, cuiyunhui@bytedance.com, wangkefeng.wang@huawei.com, qiaozhe@iscas.ac.cn Cc: ardb@kernel.org, ast@kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-mm@kvack.org, linux-crypto@vger.kernel.org, bpf@vger.kernel.org, linux-input@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-serial@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, maple-tree@lists.infradead.org, linux-trace-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-atm-general@lists.sourceforge.net, linux-btrfs@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, linux-nfs@vger.kernel.org, linux-sctp@vger.kernel.org, linux-usb@vger.kernel.org, linux-media@vger.kernel.org Subject: [RFC PATCH V3 26/43] rv64ilp32_abi: file_ref: Use 32-bit width for refcnt Date: Tue, 25 Mar 2025 08:16:07 -0400 Message-Id: <20250325121624.523258-27-guoren@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20250325121624.523258-1-guoren@kernel.org> References: <20250325121624.523258-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250325_052301_049562_64BFDBA9 X-CRM114-Status: UNSURE ( 8.84 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: "Guo Ren (Alibaba DAMO Academy)" The sizeof(atomic_t) is 4 in rv64ilp32 abi linux kernel, which could provide a higher density of cache and a smaller memory footprint. Signed-off-by: Guo Ren (Alibaba DAMO Academy) --- include/linux/file_ref.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/file_ref.h b/include/linux/file_ref.h index 9b3a8d9b17ab..ce9b47359e14 100644 --- a/include/linux/file_ref.h +++ b/include/linux/file_ref.h @@ -27,7 +27,7 @@ * 0xFFFFFFFFFFFFFFFFUL */ -#ifdef CONFIG_64BIT +#if BITS_PER_LONG == 64 #define FILE_REF_ONEREF 0x0000000000000000UL #define FILE_REF_MAXREF 0x7FFFFFFFFFFFFFFFUL #define FILE_REF_SATURATED 0xA000000000000000UL @@ -44,7 +44,7 @@ #endif typedef struct { -#ifdef CONFIG_64BIT +#if BITS_PER_LONG == 64 atomic64_t refcnt; #else atomic_t refcnt;