From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21FF4C433EF for ; Wed, 15 Dec 2021 11:19:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242055AbhLOLTE (ORCPT ); Wed, 15 Dec 2021 06:19:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237092AbhLOLTA (ORCPT ); Wed, 15 Dec 2021 06:19:00 -0500 Received: from mail-lj1-x22d.google.com (mail-lj1-x22d.google.com [IPv6:2a00:1450:4864:20::22d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44380C061574; Wed, 15 Dec 2021 03:18:59 -0800 (PST) Received: by mail-lj1-x22d.google.com with SMTP id m12so32790697ljj.6; Wed, 15 Dec 2021 03:18:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IXBBA6tooNUJe0qcFXJZUGQ+vzEcA/gvh+yxjKcwpWY=; b=pFAJRY08zh4uBk2yxFcOF5CRP5Xaooyqwvpkmq2oEvGAQ29n7VwOVwMZ5YcYsRtnjE TMWBfGOrijArZzJlMRZvq59nWMFouDYH2FJf6e8QPgc20vUl57S/RRbBOVRc9YectayT F2eCI8I/9mnHUmreR8KoSMZq3aVMOOvYOLqDkwfKPUib3W1BRd09Q4NlPJYTDXWhOMbn G3b/ALm9DCYnoIb+KaP3vIwidiQQviOunF7lPv7roa/cOYoydJdnOqD6pTL14WXmV2SO eyGz/EIHJeNKSIUIVwATPPo560Dw6J4xxFMkkPmFsjZx9utlFKT8M0AQTmJhngBqii9S g9ng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IXBBA6tooNUJe0qcFXJZUGQ+vzEcA/gvh+yxjKcwpWY=; b=Tf/8Z6B5azX79OKO+2xPA2rlT9/qj7miKW7fR7x0ST6PS8Dxa9gN8SQ8JR6UqShy3t 34DU6XhYz+QQNyLk79w9WOFHyJFkxOU9Rc1aClQ/yRYmnlzgcOygzzg2fn6DFR9VotC8 8kJxeijN54U96ZXuMjhX786hesD/gqGqha0288I/MO0CQvRbBS+VWG9mzkyoYnQh9bGE DWDdnNw85nutGTJZD9fgGUjHf3iZqWJCwN8qPXdZb69tXE4ePeRNpNry0ZKZVdk53ZcN yM8vVT/8LqtjIZ7dGJzgyQOYdVM3QIdb+PUF42PAqiVGO7J0mBSkKKRrcSBGMNMBUTA0 wX5Q== X-Gm-Message-State: AOAM533AYl6lhSLDQlJ4nfPqJqGrNE+cQ/5wf1CLFjmhea9go58iE8D3 HD7HUI/XUHtbwHyqtb/yTQzOrQpLPPd0y+ck X-Google-Smtp-Source: ABdhPJyjG0DF4H4NoX1YAecwDQnw1hcE7326b6kvl7XCGvbMqGBBUdTOiGM1KVJ4k4cFtCxeDGNOcQ== X-Received: by 2002:a05:651c:1689:: with SMTP id bd9mr9870481ljb.192.1639567137573; Wed, 15 Dec 2021 03:18:57 -0800 (PST) Received: from pc638.lan (h5ef52e3d.seluork.dyn.perspektivbredband.net. [94.245.46.61]) by smtp.gmail.com with ESMTPSA id n17sm383906ljg.128.2021.12.15.03.18.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Dec 2021 03:18:57 -0800 (PST) From: "Uladzislau Rezki (Sony)" To: LKML , RCU , "Paul E . McKenney" Cc: Michal Hocko , Andrew Morton , Daniel Axtens , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Peter Zijlstra , Thomas Gleixner , "Theodore Y . Ts'o" , Sebastian Andrzej Siewior , Uladzislau Rezki , Oleksiy Avramchenko , Uladzislau Rezki Subject: [PATCH] fs: nfs: sysfs: Switch to kvfree_rcu() API Date: Wed, 15 Dec 2021 12:18:40 +0100 Message-Id: <20211215111845.2514-4-urezki@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211215111845.2514-1-urezki@gmail.com> References: <20211215111845.2514-1-urezki@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Uladzislau Rezki Instead of invoking a synchronize_rcu() to free a pointer after a grace period we can directly make use of new API that does the same but in more efficient way. TO: Trond Myklebust TO: linux-nfs@vger.kernel.org Signed-off-by: Uladzislau Rezki --- fs/nfs/sysfs.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/nfs/sysfs.c b/fs/nfs/sysfs.c index 8cb70755e3c9..ff88d5d58e1e 100644 --- a/fs/nfs/sysfs.c +++ b/fs/nfs/sysfs.c @@ -113,10 +113,9 @@ static ssize_t nfs_netns_identifier_store(struct kobject *kobj, if (!p) return -ENOMEM; old = rcu_dereference_protected(xchg(&c->identifier, (char __rcu *)p), 1); - if (old) { - synchronize_rcu(); - kfree(old); - } + if (old) + kvfree_rcu(old); + return count; } -- 2.30.2